ITU-T SERIES X SUPP 9-2011 ITU-T X 1205 C Supplement on guidelines for reducing malware in ICT networks (Study Group 17)《ITU-T X 1205 减少信息通信技术网络中的恶意软件补充指南 17号研究组》.pdf

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1、 International Telecommunication Union ITU-T Series XTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 9(09/2011) SERIES X: DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY ITU-T X.1205 Supplement on guidelines for reducing malware in ICT networks ITU-T X-series Recommendations Supple

2、ment 9 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY PUBLIC DATA NETWORKS X.1X.199 OPEN SYSTEMS INTERCONNECTION X.200X.299 INTERWORKING BETWEEN NETWORKS X.300X.399 MESSAGE HANDLING SYSTEMS X.400X.499 DIRECTORY X.500X.599 OSI NETWORKING AND SYSTEM ASPECTS X.600

3、X.699 OSI MANAGEMENT X.700X.799 SECURITY X.800X.849 OSI APPLICATIONS X.850X.899 OPEN DISTRIBUTED PROCESSING X.900X.999 INFORMATION AND NETWORK SECURITY General security aspects X.1000X.1029 Network security X.1030X.1049 Security management X.1050X.1069 Telebiometrics X.1080X.1099 SECURE APPLICATIONS

4、 AND SERVICES Multicast security X.1100X.1109 Home network security X.1110X.1119 Mobile security X.1120X.1139 Web security X.1140X.1149 Security protocols X.1150X.1159 Peer-to-peer security X.1160X.1169 Networked ID security X.1170X.1179 IPTV security X.1180X.1199 CYBERSPACE SECURITY Cybersecurity X

5、.1200X.1229 Countering spam X.1230X.1249 Identity management X.1250X.1279 SECURE APPLICATIONS AND SERVICES Emergency communications X.1300X.1309 Ubiquitous sensor network security X.1310X.1339 CYBERSECURITY INFORMATION EXCHANGE Overview of cybersecurity X.1500X.1519 Vulnerability/state exchange X.15

6、20X.1539 Event/incident/heuristics exchange X.1540X.1549 Exchange of policies X.1550X.1559 Heuristics and information request X.1560X.1569 Identification and discovery X.1570X.1579 Assured exchange X.1580X.1589 For further details, please refer to the list of ITU-T Recommendations. X series Suppleme

7、nt 9 (09/2011) i Supplement 9 to ITU-T X-series Recommendations ITU-T X.1205 Supplement on guidelines for reducing malware in ICT networks Summary This supplement to Recommendation ITU-T X.1205 provides guidelines that can be utilized by end users to reduce malware in information and communication t

8、echnology (ICT) networks. History Edition Recommendation Approval Study Group 1.0 ITU-T X Suppl. 9 2011-09-02 17 ii X series Supplement 9 (09/2011) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and co

9、mmunication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis.

10、 The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resoluti

11、on 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a

12、recognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the publication is achieved when all of these mandatory provisions are met. The words

13、 “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the publication is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the

14、practice or implementation of this publication may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the publication developm

15、ent process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementers are cautioned that this may not represent the latest information and are therefore stron

16、gly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2012 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. X series Supplement 9 (09/2011) iii Table of Contents Page 1 Scope 1 2 Refe

17、rences. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this supplement . 1 4 Abbreviations and acronyms 2 5 Conventions 2 6 Guidelines for reducing malware in ICT networks 2 6.1 Mitigation in end-user platforms 2 6.2 Mitigation in applications . 3 6.3 Mitigation in external and

18、 portable devices . 4 Bibliography. 5 iv X series Supplement 9 (09/2011) Introduction Malware is the general term for various types of software instances intended to, or exhibiting characteristics that can, harm or threaten computers or computer systems. Malware includes viruses, worms, spyware, tro

19、jans, bots, etc. As it has become more complex, the distinctions among these types have tended to disappear. Indeed, malware types today may be polymorphic that is, they adapt and evolve as they propagate. Incidents of malware infection and related damage are increasing exponentially due in part to

20、the proliferation of ICT end-user devices and application software that are autonomously connected to open network infrastructures worldwide. This damage can include excessive network traffic, reduced available bandwidth, loss of sensitive data, lost end-user device resources, and loss of end-user c

21、onfidence. Malware has also become a major means of undertaking cybercrime, and is produced as part of criminal enterprise. As a result, malware constitutes a major threat to ICT networks and services. Malware mitigation is increasingly difficult to accomplish, even by expert end users. New techniqu

22、es particularly automated ones implemented through continuous security monitoring platforms are beginning to leverage new capabilities for sharing malware analysis and heuristics information. Malware Attribute Enumeration and Characterization, as described in b-MAEC, is one of the most prominent of

23、these capabilities and included as part of b-ITU-T X.1500. End-user awareness and behaviour can also mitigate malware propagation and important measures are included in this supplement. X series Supplement 9 (09/2011) 1 Supplement 9 to ITU-T X-series Recommendations ITU-T X.1205 Supplement on guidel

24、ines for reducing malware in ICT networks 1 Scope This supplement provides guidelines for end users to reduce malware in ICT networks, including propagation in end-user devices, applications, and external and portable devices. These guidelines can be implemented manually or through automated techniq

25、ues for cybersecurity information exchange described in b-ITU-T X.1500. 2 References None. 3 Definitions 3.1 Terms defined elsewhere This supplement uses the following terms defined elsewhere: 3.1.1 bot b-ITU-T X.1244: Bot is a contraction of “robot“, which is a program that operates as an agent for

26、 a user or another program to simulate a human activity. 3.1.2 certificate b-ITU-T X.1252: A set of security-relevant data issued by a security authority or a trusted third party, which, together with security information, is used to provide the integrity and data origin authentication services for

27、the data. 3.1.3 firewall b-ITU-T X.1205: A system or combination of systems that enforces a boundary between two or more networks. A gateway that limits access between networks in accordance with local security policy. 3.1.4 P2P communications b-ITU-T X.1161: Communications on P2P network, whereby e

28、ach peer communicates with another peer directly for sharing information, resources, etc. 3.2 Terms defined in this supplement This supplement defines the following terms: 3.2.1 end-user device (EUD): A network-attached terminal generally under the control of a network subscriber, whether hardware o

29、r software based, mobile and/or stationary, and including personal computer (PC)s, multimedia terminals, and mobile phones. 3.2.2 end-user firewall: A software application running on a single machine, and protecting network traffic into and out of that machine to permit or deny communications based

30、on an end-user-defined security policy. 3.2.3 instant messaging: A real-time communication service between two or more users, generally via the network, which enables the sending of messages and files to other users. 3.2.4 malware: Software instances intended to, or exhibiting characteristics that h

31、arm or threaten computers or computer systems. 3.2.5 service set identifier (SSID): A name that identifies a particular wireless access point. 3.2.6 smartphone: A mobile phone that offers more advanced computing ability and connectivity than a contemporary feature phone. NOTE Smartphones and feature

32、 phones are handheld computers integrated with a mobile telephone. 2 X series Supplement 9 (09/2011) 4 Abbreviations and acronyms This supplement uses the following abbreviations and acronyms: EUD End-User Device HDD Hard Disk Drive ICT Information and Communication Technology ID IDentification or I

33、Dentifier LAN Local Area Network OS Operating System P2P Peer-to-Peer PC Personal Computer PDA Personal Digital Assistant SSID Service Set IDentifier TLS Transport Layer Security URL Uniform Resource Locator USB Universal Serial Bus WLAN Wireless LAN 5 Conventions None. 6 Guidelines for reducing mal

34、ware in ICT networks 6.1 Mitigation in end-user platforms 6.1.1 Software management End users today are enabled to install many types of software on their devices. However, the software, including updates, can be used to propagate hidden malware. Users should manually, or by automatic means: use sof

35、tware provided (and, ideally, signed using strong certificates) by reputable vendors keep all software on the end-user device up-to-date enable software security updates to run automatically with user review understand and use security options watch continuously for threats manifested by installed s

36、oftware. 6.1.2 Anti-malware product installation and management Anti-malware products for specific end-user devices or platforms are important for detecting and responding to malware. Users should manually, or by automatic means: use compatible anti-malware products (and, ideally, signed using stron

37、g certificates) by reputable vendors use anti-malware software regularly to run a full scan on end-user devices keep the anti-malware software and signatures current X series Supplement 9 (09/2011) 3 install or enable an end-user firewall, and configure it to filter traffic coming into and leaving e

38、nd-user devices. 6.1.3 Operating-system management An operating system (OS) is software, consisting of programs and data, that runs end-user devices, manages the EUD hardware resources, and provides common services for the execution of various application software. Careless OS account management may

39、 allow an attacker to use a device in a way that leads to leakage of sensitive information and propagation of malware. Consequently, appropriate OS management is very important for reducing malware propagation. Users should manually, or by automatic means: create strong passwords especially for admi

40、nistrator or root accounts frequently change account password. 6.1.4 WLAN configuration Wireless LANs are vulnerable to attacks and misuse if their access points/routers are not properly configured. Users should manually or by automatic means: use a strong password for the WLAN access point administ

41、rator password restrict WLAN access by using strong encryption and passwords use a firewall in the WLAN router. 6.2 Mitigation in applications 6.2.1 E-mail, including instant messaging E-mail is a common means for transferring files together with messages. However, malware can be propagated through

42、such files. Propagation may also occur via a linked file or link address. Malware may propagate more widely by sending itself to another e-mail address stored in the infected end-user device using e-mail addresses generated from user contact lists. Users should manually, or by automatic means: selec

43、t strong e-mail security settings be wary of unsolicited attachments, even from people known to them be wary of clicking on unknown URLs save and check any attachments using anti-malware software before opening them turn off options for automatically downloading attachments. 6.2.2 File sharing File

44、sharing involves using technology that allows networked users to share files on end-user devices. Peer-to-peer (P2P) applications, such as those used to share music files, are some of the most common forms of file-sharing technology. However, P2P applications can be used as a means for propagating m

45、alware. Users should manually, or by automatic means: disable file-sharing when not using it save and check downloaded files for malware before opening them. 6.2.3 Web A web browser is an application that finds and displays web pages. To increase functionality or add design embellishments, web sites

46、 often rely on scripts that execute programs within the web browser. This active content can be used to create splash pages or options like drop-down menus. These scripts are often used as a way for attackers to download or execute malware on an end-user device. Secure usage and management of the we

47、b browser is important for preventing devices from being infected with malware. Users should manually, or by automatic means: 4 X series Supplement 9 (09/2011) check a web sites certificate, favouring extended validation certificates that offer far greater assurance levels that the site is genuine u

48、se web TLS capabilities by typing in “https:“ followed by the URL, or verifying that the https exists as the URL prefix, when additional security is desired as, for instance, in the case of financial transactions, conveying of sensitive information, or downloading software keep the browser applicati

49、on software and security patches up-to-date not use predictive text input for ID and password remove temporary files periodically delete the browser cookies periodically not use automatic login be wary of clicking on unknown URLs and avoid access to web sites that are not familiar or trusted not click and download unidentified files and programs scan downloaded files for malware, as for any software. 6.3 Mitigation in external and portable