Extensions to the IODEF-Document Class for Reporting Phishing
RFC 5901

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• 07

Internet Engineering Task Force (IETF)                           P. Cain
Request for Comments: 5901                   The Cooper-Cain Group, Inc.
Category: Standards Track                                      D. Jevans
ISSN: 2070-1721                          The Anti-Phishing Working Group
                                                               July 2010

     Extensions to the IODEF-Document Class for Reporting Phishing

Abstract

   This document extends the Incident Object Description Exchange Format
   (IODEF) defined in RFC 5070 to support the reporting of phishing
   events, which is a particular type of fraud.  These extensions are
   flexible enough to support information gleaned from activities
   throughout the entire electronic fraud cycle -- from receipt of the
   phishing lure to the disablement of the collection site.  Both simple
   reporting and complete forensic reporting are possible, as is
   consolidating multiple incidents.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc5901.

Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Cain & Jevans                Standards Track                    [Page 1]
RFC 5901                IODEF Phishing Extensions              July 2010

Table of Contents

   1. Introduction ....................................................3
      1.1. Why a Common Report Format Is Needed .......................3
      1.2. Processing of Exchanged Data Not Defined ...................4
      1.3. Relation to the INCH IODEF Data Model ......................4
   2. Terminology Used in This Document ...............................4
      2.1. Requirements Language ......................................5
   3. Interesting Fraud Event Data ....................................5
      3.1. The Elements of a Phishing/Fraud Event .....................6
      3.2. Useful Data Items in a Fraud Event .........................7
   4. Fraud Activity Reporting via IODEF-Documents ....................8
      4.1. Fraud Report Types .........................................8
      4.2. Fraud Report XML Representation ............................9
      4.3. Syntactical Correctness of Fraud Activity Reports ..........9
   5. PhraudReport Element Definitions ...............................10
      5.1. PhraudReport Structure ....................................10
      5.2. Reuse of IODEF-Defined Elements ...........................11
      5.3. Element and Attribute Specification Format ................11
      5.4. Version Attribute .........................................12
      5.5. FraudType Attribute .......................................12
      5.6. PhishNameRef Element ......................................13
      5.7. PhishNameLocalRef Element .................................13
      5.8. FraudedBrandName Element ..................................13
      5.9. LureSource Element ........................................14
      5.10. OriginatingSensor Element ................................22
      5.11. The DCSite Element .......................................23
      5.12. TakeDownInfo Element .....................................25
      5.13. ArchivedData Element .....................................27
      5.14. RelatedData Element ......................................28
      5.15. CorrelationData Element ..................................28
      5.16. PRComments Element .......................................28
      5.17. EmailRecord Element ......................................28
   6. Mandatory IODEF and PhraudReport Elements ......................29
      6.1. Guidance on Usage .........................................30
   7. Security Considerations ........................................31
      7.1. Transport-Specific Concerns ...............................31
      7.2. Using the iodef:restriction Attribute .....................31