ISO/IEC DIS 27035-2

Information technology — Information security incident management — Part 2: Guidelines to plan and prepare for incident response

This document provides guidelines to plan and prepare for incident response and to learn lessons from incident response. The guidelines are based on the “plan and prepare” and “learn lessons” phases of the information security incident management phases model presented in ISO/IEC 27035-1:2023, 5.2 and 5.6. The major points within the “plan and prepare” phase include: — information security incident management policy and commitment of top management; — information security policies, including those relating to risk management, updated at both organizational level and system, service and network levels; — information security incident management plan; — Incident Management Team (IMT) establishment; — establishing relationships and connections with internal and external organizations; — technical and other support (including organizational and operational support); — information security incident management awareness briefings and training. The “learn lessons” phase includes: — identifying areas for improvement; — identifying and making necessary improvements; — Incident Response Team (IRT) evaluation. The guidance given in this document is generic and intended to be applicable to all organizations, regardless of type, size or nature. Organizations can adjust the guidance given in this document according to their type, size and nature of business in relation to the information security risk situation. This document is also applicable to external organizations providing information security incident management services.

Technologies de l'information — Gestion des incidents de sécurité de l'information — Partie 2: Lignes directrices pour planifier et préparer une réponse aux incidents

General Information

• Status: Published
• Publication Date: 12-Feb-2023
• ICS: 35.030 - IT Security
• Technical Committee: ISO/IEC JTC 1/SC 27 - Information security, cybersecurity and privacy protection
• Drafting Committee: ISO/IEC JTC 1/SC 27/WG 4 - Security controls and services
• Current Stage: 6060 - International Standard published
• Start Date: 13-Feb-2023
• Due Date: 08-Jul-2023
• Completion Date: 13-Feb-2023

Relations

• Revises: ISO/IEC 27035-2:2016 - Information technology — Security techniques — Information security incident management — Part 2: Guidelines to plan and prepare for incident response
• Effective Date: 23-Apr-2020

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
27035-2
ISO/IEC JTC 1/SC 27
Information technology —
Secretariat: DIN
Information security incident
Voting begins on:
2022-10-25 management —
Voting terminates on:
Part 2:
2022-12-20
Guidelines to plan and prepare for
incident response
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC FDIS 27035-2:2022(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO/IEC 2022
---------------------- Page: 1 ----------------------
ISO/IEC FDIS 27035-2:2022(E)
FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
27035-2
ISO/IEC JTC 1/SC 27
Information technology —
Secretariat: DIN
Information security incident
Voting begins on:
management —
Voting terminates on:
Part 2:
Guidelines to plan and prepare for
incident response
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/IEC FDIS 27035­2:2022(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
© ISO/IEC 2022 – All rights reserved
NATIONAL REGULATIONS. © ISO/IEC 2022
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ISO/IEC FDIS 27035-2:2022(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction .............................................................................................................................................................................................................................. vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms, definitions and abbreviated terms .............................................................................................................................. 2

3.1 Terms and definitions ...................................................................................................................................................................... 2

3.2 Abbreviated terms .............................................................................................................................................................................. 2

4 Information security incident management policy ........................................................................................................ 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Interested parties ................................................................................................................................................................................ 3

4.3 Information security incident management policy content ........................................................................... 3

5 Updating of information security policies................................................................................................................................ 5

5.1 General ........................................................................................................................................................................................................... 5

5.2 Linking of policy documents ...................................................................................................................................................... 6

6 Creating information security incident management plan .................................................................................... 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Information security incident management plan built on consensus ................................................... 7

6.3 Interested parties ................................................................................................................................................................................ 7

6.4 Information security incident management plan content ............................................................................... 8

6.5 Incident classification scale ..................................................................................................................................................... 11

6.6 Incident forms ...................................................................................................................................................................................... 11

6.7 Documented processes and procedures .......................................................................................................................12

6.8 Trust and confidence ......................................................................................................................................................................13

6.9 Handling confidential or sensitive information ..................................................................................................... 14

7 Establishing an incident management capability .........................................................................................................14

7.1 General ........................................................................................................................................................................................................ 14

7.2 Incident management team establishment ................................................................................................................ 14

7.2.1 IMT structure ..................................................................................................................................................................... 14

7.2.2 IMT roles and responsibilities ............................................................................................................................. 16

7.3 Incident response team establishment .......................................................................................................................... 17

7.3.1 IRT structure ...................................................................................................................................................................... 17

7.3.2 IRT types and roles ....................................................................................................................................................... 18

7.3.3 IRT staff competencies ........................................................................................................................................... .... 19

8 Establishing internal and external relationships .........................................................................................................20

8.1 General ........................................................................................................................................................................................................ 20

8.2 Relationship with other parts of the organization .............................................................................................. 20

8.3 Relationship with external interested parties........................................................................................................ 21

9 Defining technical and other support ........................................................................................................................................22

9.1 General ........................................................................................................................................................................................................22

9.2 Technical support ...................................................................... ........................................................................................................ 24

9.3 Other support ....................................................................................................................................................................................... 24

10 Creating information security incident awareness and training .................................................................24

11 Testing the information security incident management plan .........................................................................25

11.1 General ........................................................................................................................................................................................................ 25

11.2 Exercise ...................................................................................................................................................................................................... 26

11.2.1 Defining the goal of the exercise ....................................................................................................................... 26

11.2.2 Defining the scope of an exercise ..................................................................................................................... 27

11.2.3 Conducting an exercise .............................................................................................................................................. 27

11.3 Incident response capability monitoring ..................................................................................................................... 27

11.3.1 Implementing an incident response capability monitoring programme ...................... 27

iii
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ISO/IEC FDIS 27035-2:2022(E)

11.3.2 Metrics and governance of incident response capability monitoring ..............................28

12 Learn lessons .......................................................................................................................................................................................................28

12.1 General ........................................................................................................................................................................................................28

12.2 Identifying areas for improvement ...................................................................................................................................29

12.3 Identifying and making improvements to the information security incident

management plan ..............................................................................................................................................................................29

12.4 IRT Evaluation......................................................................................................................................................................................30

12.5 Identifying and making improvements to information security control

implementation ...................................................................................................................................................................................30

12.6 Identifying and making improvements to information security risk assessment

and management review results ......................................................................................................................................... 31

12.7 Other improvements ...................................................................................................................................................................... 31

Annex A (informative) Considerations related to legal or regulatory requirements ..................................32

Annex B (informative) Example forms for information security events, incidents and

vulnerability reports ...................................................................................................................................................................................35

Annex C (informative) Example approaches to the categorization, evaluation and

prioritization of information security events and incidents .............................................................................47

Bibliography .............................................................................................................................................................................................................................52

© ISO/IEC 2022 – All rights reserved
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ISO/IEC FDIS 27035-2:2022(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide standardization. National bodies that are

members of ISO or IEC participate in the development of International Standards through technical

committees established by the respective organization to deal with particular fields of technical

activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international

organizations, governmental and non­governmental, in liaison with ISO and IEC, also take part in the

work.

The procedures used to develop this document and those intended for its further maintenance

are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria

needed for the different types of document should be noted. This document was drafted in

accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or

www.iec.ch/members_experts/refdocs).

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent

rights. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC

list of patent declarations received (see https://patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see

www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding­standards.

This document was prepared by Technical Committee ISO/IEC JTC 1, Information technology,

Subcommittee SC 27, Information security, cybersecurity and privacy protection.

This second edition cancels and replaces the first edition (ISO/IEC 27035-2:2016), which has been

technically revised.
The main changes are as follows:
— the title has been modified;

— new roles including incident management team and incident coordinator and their responsibilities

have been added;
— content related to vulnerability management has been modified;
— content on a recommended process for organizations has been added in 6.7;
— Clause 7 structure has been reorganized;
— C.3 has been replaced by a single paragraph;
— bibliography has been updated;
— document has been aligned with the ISO/IEC Directives Part 2, 2021.

A list of all parts in the ISO/IEC 27035 series can be found on the ISO and IEC websites.

Any feedback or questions on this document should be directed to the user’s national standards

body. A complete listing of these bodies can be found at www.iso.org/members.html and

www.iec.ch/national­committees.
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ISO/IEC FDIS 27035-2:2022(E)
Introduction

This document focuses on information security incident management which is identified in

ISO/IEC 27000 as one of the critical success factors for the information security management system.

There can be a large gap between an organization’s plan for an incident and an organization's

preparedness for an incident. Therefore, this document addresses the development of procedures to

increase the confidence of an organization’s actual readiness to respond to an information security

incident. This is achieved by addressing the policies and plans associated with incident management,

as well as the process for establishing the incident response team and improving its performance over

time by adopting lessons learned and by evaluation.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/IEC FDIS 27035-2:2022(E)
Information technology — Information security incident
management —
Part 2:
Guidelines to plan and prepare for incident response
1 Scope

This document provides guidelines to plan and prepare for incident response and to learn lessons from

incident response. The guidelines are based on the “plan and prepare” and “learn lessons” phases of the

information security incident management phases model presented in ISO/IEC 27035-1:— , 5.2 and

5.6.
The major points within the “plan and prepare” phase include:

— information security incident management policy and commitment of top management;

— information security policies, including those relating to risk management, updated at both

organizational level and system, service and network levels;
— information security incident management plan;
— Incident Management Team (IMT) establishment;

— establishing relationships and connections with internal and external organizations;

— technical and other support (including organizational and operational support);

— information security incident management awareness briefings and training.
The “learn lessons” phase includes:
— identifying areas for improvement;
— identifying and making necessary improvements;
— Incident Response Team (IRT) evaluation.

The guidance given in this document is generic and intended to be applicable to all organizations,

regardless of type, size or nature. Organizations can adjust the guidance given in this document

according to their type, size and nature of business in relation to the information security risk situation.

This document is also applicable to external organizations providing information security incident

management services.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/IEC 27000, Information technology — Security techniques — Information security management

systems — Overview and vocabulary

1) Under preparation. Stage at the time of publication: ISO/IEC/FDIS 27035­1:2022.

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ISO/IEC FDIS 27035-2:2022(E)

ISO/IEC 27035­1:— , Information technology — Information security incident management — Part 1:

Principles and process
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/IEC 27000 and ISO/IEC 27035-1

apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.2 Abbreviated terms
CERT computer emergency response team
CSIRT computer security incident response team
IMT Incident Management Team
IRT Incident Response Team
PoC Point of Contact
4 Information security incident management policy
4.1 General
1)
NOTE Clause 4, in its entirety, links to ISO/IEC 27035-1:— , 5.2 a).

An organization's information security incident management policy should provide the formally

documented principles and intentions used to direct decision­making. Supporting processes and

procedures ensures consistent application of the policy.

Any information security incident management policy should be part of the information security

strategy for an organization. It should also support the existing mission of its parent organization and

be in line with already existing policies and procedures.

An organization should implement an information security incident management policy that outlines

the processes, responsible persons, authority and reporting lines when an information security event/

incident occurs. The policy should be reviewed regularly to ensure it reflects the latest organizational

structure, processes, and technology that can affect incident management. The policy should also

outline any awareness and training initiatives within the organization that are related to incident

management (see Clause 10).

An organization should document its policy for managing information security events, incidents and

vulnerabilities as a free-standing document, as part of its overall information security management

system policy (see ISO/IEC 27001:— , 5.2), or as part of its information security policies (see

ISO/IEC 27002:2022, 5.1). The size, structure and business nature of an organization and the extent of

its information security incident management programme are deciding factors in determining which

of these options to adopt. An organization should direct its information security incident management

policy at every person having legitimate access to its information systems and related locations.

2) Under preparation. Stage at the time of publication ISO/IEC FDIS 27001:2022.
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ISO/IEC FDIS 27035-2:2022(E)

Before the information security incident management policy is formulated, the organization should

identify the following regarding its information security incident management:
a) principles, objectives and purpose;

b) the scope, including not only which parts of the organization it applies to, but also what information

it applies to e.g. hardcopy, electronic, verbal;
c) internal and external interested parties;

d) specific incident types and vulnerabilities that are controlled, responded to and resolved;

e) any specific roles that are involved;
f) benefits to the whole organization and to its departments;
g) understanding of its legal and regulatory environment;
h) dependencies including alignment to risk management;
i) skills and competency requirements.
4.2 Interested parties

A successful information security incident management policy should be created and implemented

as an enterprise­wide process. To that end, all interested parties or their representatives should be

involved in the development of the policy from the initial planning stages through to the implementation

of any process or response team. This may include legal advisors, public relations and marketing staff,

departmental managers, security staff, ICT responsible persons, upper-level management, and, in some

cases, even facilities and human resources staff.

An organization should ensure that its information security incident management policy is approved by

top management.

Ensuring continued management commitment is vital for the acceptance of a structured approach to

information security incident management. It is important that personnel recognize an event, know

what to do and understand the benefits of the approach by the organization. It is also important that

management is supportive of the information security incident management policy to ensure that the

organization commits to resourcing and maintaining an incident management capability.

The information security incident management policy should be made available to every employee and

contractor. It should also be addressed in information security awareness briefings and training.

4.3 Information security incident management policy content

The information security incident management policy should be high-level. Detailed information and

step-by-step instructions should be included in the series of documents that make up the information

security incident management plan, which is outlined in Clause 6.

An organization should ensure that its information security incident management policy content

addresses, but is not limited to, the following topics:

a) the purpose, objectives and the scope (to whom it applies and under what circumstances) of the

policy;
b) policy owner and review cycle;

c) the importance of information security incident management to the organization, top management's

commitment to it and the related plan documentation;
d) a definition of security incident;
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ISO/IEC FDIS 27035-2:2022(E)

e) a description of the type of security incidents or categories (or a reference to another document

which describes this in more depth);

f) a description of how incidents should be reported, including what to report, the mechanisms used

for reporting, where and to whom to report;

g) a high-level overview or visualization of the incident management process flow (showing the basic

steps for handling a security incident) encompassing detection and reporting, assessment and

decision, response and lessons learned;

h) a requirement for post information security incident resolution activities, including learning from

and improving the process, following the resolution of information security incidents;

i) if appropriate, also a summary of reporting and handling vulnerabilities that are related to incident

(although this can be a separate document);

j) a defined set of roles, responsibilities, and decision-making authority for each phase of the

information security incident management process and related activities (including reporting and

handling vulnerabilities that are related to incident if appropriate);

k) a reference to the document describing the event and incident classification, severity ratings (if

used) and related terms;

l) an overview of the IMT, encompassing the IMT organizational structure, key roles, responsibilities,

and authority, along with summary of duties including, but not limited to:

1) reporting and notification requirements related to incidents that have been confirmed,

2) dealing with enquiries, instigating follow-up, and resolving incidents,
3) liaising with the external organizations (when necessary),

4) requirement and rationale for ensuring all information security incident management activities

performed by the IRT are properly logged for later analysis;

m) requirements for establishing/terminating IRTs to respond to specific incidents which have

different scopes and expertise depending on the incident. Several IRTs may exist, depending on the

aspect of business that is affected by the incident;

n) a requirement that components across the organization work in collaboration to detect, analyse,

and respond to information security incidents;

o) a description of any oversight or governance structure and its authority and duties, if applicable;

p) links to organizations providing specific external support such as forensics teams, legal counsel,

other IT operations, etc;

q) a summary of the legal and regulatory compliance requirements or mandates associated with

information security incident management activities (for more details, see Annex A).

There are other related policies or procedures that support the information security incident

management policy and can also be established as part of the preparation phase, if they are not already

existent and are appropriate for the organization. These include, but are not lim

...

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Formatted
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation,

no part of this publication may be reproduced or utilized otherwise in any form or by any means,

electronic or mechanical, including photocopying, or posting on the internet or an intranet,

without prior written permission. Permission can be requested from either ISO at the address

below or ISO's member body in the country of the requester.
ISO Copyright Office
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
Website: www.iso.org
Published in Switzerland.
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ISO/IEC FDIS 27035-2:2022(E)
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Contents Page

Foreword ...................................................................................................................................................................... 5

Introduction ................................................................................................................................................................ 6

1 Scope ................................................................................................................................................................ 1

2 Normative references ................................................................................................................................ 1

3 Terms, definitions and abbreviated terms .......................................................................................... 2

3.1 Terms and definitions ................................................................................................................................ 2

3.2 Abbreviated terms ...................................................................................................................................... 2

4 Information security incident management policy .......................................................................... 2

4.1 General ............................................................................................................................................................ 2

4.2 Interested parties ........................................................................................................................................ 3

4.3 Information security incident management policy content .......................................................... 3

5 Updating of information security policies ........................................................................................... 6

5.1 General ............................................................................................................................................................ 6

5.2 Linking of policy documents .................................................................................................................... 6

6 Creating information security incident management plan ............................................................ 6

6.1 General ............................................................................................................................................................ 6

6.2 Information security incident management plan built on consensus ........................................ 7

6.3 Interested parties ........................................................................................................................................ 8

6.4 Information security incident management plan content ............................................................. 8

6.5 Incident classification scale ................................................................................................................... 12

6.6 Incident forms ............................................................................................................................................ 12

6.7 Documented processes and procedures ............................................................................................ 13

6.8 Trust and confidence ................................................................................................................................ 14

6.9 Handling confidential or sensitive information .............................................................................. 15

7 Establishing an incident management capability ........................................................................... 15

7.1 General .......................................................................................................................................................... 15

7.2 Incident management team (IMT) establishment .......................................................................... 16

7.2.1 IMT structure .............................................................................................................................................. 16

7.2.2 IMT roles and responsibilities .............................................................................................................. 16

7.3 Incident response team (IRT) establishment ................................................................................... 18

7.3.1 IRT structure ............................................................................................................................................... 18

7.3.2 IRT types and roles ................................................................................................................................... 19

7.3.3 IRT staff competencies ............................................................................................................................. 20

8 Establishing internal and external relationships ........................................................................... 21

8.1 General .......................................................................................................................................................... 21

8.2 Relationship with other parts of the organization ......................................................................... 21

8.3 Relationship with external interested parties ................................................................................. 22

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10 Creating information security incident awareness and training ............................................... 26

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ISO/IEC FDIS 27035-2:2022(E)

11 Testing the information security incident management plan .................................................... 27

11.1 General .......................................................................................................................................................... 27

11.2 Exercise ......................................................................................................................................................... 28

11.2.1 Defining the goal of the exercise ........................................................................................................... 28

11.2.2 Defining the scope of an exercise ......................................................................................................... 28

11.2.3 Conducting an exercise ............................................................................................................................ 29

11.3 Incident response capability monitoring .......................................................................................... 29

11.3.1 Implementing an incident response capability monitoring programme ................................ 29

11.3.2 Metrics and governance of incident response capability monitoring ...................................... 30

12 Lessons learned ......................................................................................................................................... 30

12.1 General .......................................................................................................................................................... 30

12.2 Identifying areas for improvement ..................................................................................................... 31

12.3 Identifying and making improvements to the information security incident

management plan ...................................................................................................................................... 31

12.4 IRT Evaluation ............................................................................................................................................ 32

12.5 Identifying and making improvements to information security control

implementation ......................................................................................................................................... 33

12.6 Identifying and making improvements to information security risk assessment and

management review results ................................................................................................................... 33

12.7 Other improvements ................................................................................................................................ 33

Annex A (informative) Considerations related to legal or regulatory requirements ...................... 35

A.1 Introduction ................................................................................................................................................ 35

A.2 Data protection and privacy of personal information ................................................................... 35

A.3 Record keeping .......................................................................................................................................... 35

A.4 Controls to ensure fulfilment of commercial contractual obligations ..................................... 35

A.5 Legal issues related to policies and procedures .............................................................................. 36

A.6 Disclaimers are checked for legal validity ........................................................................................ 36

A.7 Contracts with external support personnel ...................................................................................... 36

A.8 Non-disclosure agreements ................................................................................................................... 36

A.9 Law enforcement requirements ........................................................................................................... 36

A.10 Liability aspects ......................................................................................................................................... 36

A.11 Specific regulatory requirements ........................................................................................................ 37

A.12 Prosecutions, or internal disciplinary procedures......................................................................... 37

A.13 Legal aspects ............................................................................................................................................... 37

A.14 Acceptable use policy ............................................................................................................................... 37

Annex B (informative) Example forms for information security events, incidents and

vulnerability reports ................................................................................................................................ 38

B.1 Introduction ................................................................................................................................................ 38

B.2 Example items in records ....................................................................................................................... 38

B.2.1 Example items of the record for information security event ...................................................... 38

B.2.2 Example items of the record for information security incident ................................................. 39

B.2.3 Example items of the record for information security vulnerability ........................................ 40

B.3 How to use forms ....................................................................................................................................... 40

B.3.1 Format of date and time .......................................................................................................................... 40

B.3.2 Notes for completion ................................................................................................................................ 40

B.4 Example forms ............................................................................................................................................ 42

B.4.1 Example form for information security event report .................................................................... 42

B.4.2 Example form for information security incident report ............................................................... 43

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B.4.3 Example form for information security vulnerability report ..................................................... 49

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prioritization of information security events and incidents ....................................................... 50

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C.2 Categorization of information security incidents ........................................................................... 50

C.3 Evaluation and prioritization of information security incidents ............................................... 56

Bibliography.............................................................................................................................................................. 57

Foreword ................................................................................................................................................................... viii

Introduction ................................................................................................................................................................. x

1 Scope ................................................................................................................................................................ 1

2 Normative references ................................................................................................................................ 2

3 Terms, definitions and abbreviated terms .......................................................................................... 2

3.1 Terms and definitions ................................................................................................................................ 2

3.2 Abbreviated terms ...................................................................................................................................... 2

4 Information security incident management policy .......................................................................... 2

4.1 General ............................................................................................................................................................ 2

4.2 Interested parties ........................................................................................................................................ 3

4.3 Information security incident management policy content .......................................................... 4

5 Updating of information security policies ........................................................................................... 6

5.1 General ............................................................................................................................................................ 6

5.2 Linking of policy documents .................................................................................................................... 7

6 Creating information security incident management plan ............................................................ 7

6.1 General ............................................................................................................................................................ 7

6.2 Information security incident management plan built on consensus ........................................ 8

6.3 Interested parties ........................................................................................................................................ 8

6.4 Information security incident management plan content ............................................................. 9

6.5 Incident classification scale ................................................................................................................... 13

6.6 Incident forms ............................................................................................................................................ 13

6.7 Documented processes and procedures ............................................................................................ 13

6.8 Trust and confidence ................................................................................................................................ 15

6.9 Handling confidential or sensitive information .............................................................................. 15

7 Establishing an incident management capability ........................................................................... 16

7.1 General .......................................................................................................................................................... 16

7.2 Incident management team establishment ...................................................................................... 16

7.2.1 IMT structure .............................................................................................................................................. 16

7.2.2 IMT roles and responsibilities .............................................................................................................. 18

7.3 Incident response team establishment .............................................................................................. 20

7.3.1 IRT structure ............................................................................................................................................... 20

7.3.2 IRT types and roles ................................................................................................................................... 21

7.3.3 IRT staff competencies ............................................................................................................................. 23

8 Establishing internal and external relationships ........................................................................... 24

8.1 General .......................................................................................................................................................... 24

8.2 Relationship with other parts of the organization ......................................................................... 24

8.3 Relationship with external interested parties ................................................................................. 25

9 Defining technical and other support ................................................................................................. 26

9.1 General .......................................................................................................................................................... 26

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9.3 Other support ............................................................................................................................................. 28

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10 Creating information security incident awareness and training ............................................... 28 pt

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11 Testing the information security incident management plan .................................................... 30

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11.1 General .......................................................................................................................................................... 30

11.2 Exercise ......................................................................................................................................................... 30

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11.2.1 Defining the goal of the exercise ........................................................................................................... 30

11.2.2 Defining the scope of an exercise ......................................................................................................... 31

11.2.3 Conducting an exercise ............................................................................................................................ 31

11.3 Incident response capability monitoring .......................................................................................... 32

11.3.1 Implementing an incident response capability monitoring programme ................................ 32

11.3.2 Metrics and governance of incident response capability monitoring ...................................... 32

12 Learn lessons .............................................................................................................................................. 33

12.1 General .......................................................................................................................................................... 33

12.2 Identifying areas for improvement ..................................................................................................... 33

12.3 Identifying and making improvements to the information security incident

management plan ...................................................................................................................................... 34

12.4 IRT Evaluation ............................................................................................................................................ 34

12.5 Identifying and making improvements to information security control

implementation ......................................................................................................................................... 35

12.6 Identifying and making improvements to information security risk assessment and

management review results ................................................................................................................... 36

12.7 Other improvements ................................................................................................................................ 36

Annex A (informative) Considerations related to legal or regulatory requirements ...................... 37

Annex B (informative) Example forms for information security events, incidents and

vulnerability reports ................................................................................................................................ 41

Annex C (informative) Example approaches to the categorization, evaluation and

prioritization of information security events and incidents ....................................................... 59

Bibliography.............................................................................................................................................................. 66

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Foreword

ISO (the International Organization for Standardization) is aand IEC (the International Formatted: English (United Kingdom)

Electrotechnical Commission) form the specialized system for worldwide federation of national

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standardsstandardization. National bodies (that are members of ISO member bodies). The work of

preparingor IEC participate in the development of International Standards is normally carried out

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through ISO technical committees. Each member body interested in a subject for which a technical

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committee has been established has the right to be represented on that committee. Internationalby the

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respective organization to deal with particular fields of technical activity. ISO and IEC technical

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committees collaborate in fields of mutual interest. Other international organizations, governmental

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and non-governmental, in liaison with ISO and IEC, also take part in the work. ISO collaborates closely

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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical

standardization.
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The procedures used to develop this document and those intended for its further maintenance are

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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

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