Forensic corpora

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This page describes large-scale corpora of forensically interesting information that are available for those involved in forensic research.

Contents

Disk Images

The Real Data Corpus.
Between 1998 and 2006, Garfinkel acquired 1250+ hard drives on the secondary market. These hard drive images have proven invaluable in performing a range of studies such as the developing of new forensic techniques and the sanitization practices of computer users.
Garfinkel, S. and Shelat, A., "Remembrance of Data Passed: A Study of Disk Sanitization Practices," IEEE Security and Privacy, January/February 2003.
The Honeynet Project Forensic Challenge.
In 2001 the Honeynet project distributed a set of disk images and asked participants to conduct a forensic analysis of a compromised computer. Entries were judged and posted for all to see. The drive and writeups are still available online.
http://www.honeynet.org/challenge/index.html
The Computer Forensic Reference Data Sets project from NIST hosts a few sample cases that may be useful for examiners to practice with
http://www.cfreds.nist.gov/Hacking_Case.html
Digital Forensics Tool Testing Images can be downloaded from Sourceforge
http://dftt.sourceforge.net/
Shortinfosec
computer forensics competition
http://www.shortinfosec.net/2008/07/competition-computer-forensic.html
In the competition, you will have to analyze a submitted disk image for incriminating evidence.
Lance Mueller has created some disk images; they can be downloaded from his blog
http://www.forensickb.com/search?q=practical
The PyFlag standard test image set
http://pyflag.sourceforge.net/Documentation/tutorials/howtos/test_image.html

Network Packets and Traces

DARPA ID Eval

The DARPA Intrusion Detection Evaluation. In 1998, 1999 and 2000 the Information Systems Technology Group at MIT Lincoln Laboratory created a test network complete with simulated servers, clients, clerical workers, programmers, and system managers. Baseline traffic was collected. The systems on the network were then “attacked” by simulated hackers. Some of the attacks were well-known at the time, while others were developed for the purpose of the evaluation.

WIDE

The MAWI Working Group of the WIDE Project maintains a Traffic Archive. In it you will find:

  • daily trace of a trans-Pacific T1 line;
  • daily trace at an IPv6 line connected to 6Bone;
  • daily trace at another trans-Pacific line (100Mbps link) in operation since 2006/07/01.

Traffic traces are made by tcpdump, and then, IP addresses in the traces are scrambled by a modified version of tcpdpriv.

Wireshark

The open source Wireshark project (formerly known as Ethereal) has a website with many network packet captures:

NFS Packets

The Storage Networking Industry Association has a set of network file system traces that can be downloaded from:

Text Files

Email messages

The Enron Corpus of email messages that were seized by the Federal Energy Regulatory Commission during its investigation of Enron.

Log files

CRAWDAD is a community archive for wireless data.

CAIDA collects a wide variety of data.

DShield asks users to submit firewall logs.

Text for Text Retrieval

The Text REtrieval Conference (TREC) has made available a series of text collections.

American National Corpus

The American National Corpus (ANC) project is creating a massive collection of American english from 1990 onward. The goal is to create a corpus of at least 100 million words that is comparable to the British National Corpus.

British National Corpus

The British National Corpus (100) is a 100 million word collection of written and spoken english from a variety of sources.

Voice

CALLFRIEND

CALLFRIEND is a database of recorded English conversations. A total of 60 recorded conversations are available from the University of Pennsylvania at a cost of $600.

TalkBank

TalkBank in an online database of spoken language. The project was originally funded between 1999 and 2004 by two National Science Foundation grants; ongoing support is provided by two NSF grants and one NIH grant.

Augmented Multi-Party Interaction Corpus

The AMI Meeting Corpus has 100 hours of meeting recordings.

Other Corpora

  • The Canterbury Corpus is a set of files used for testing lossless compression algorithms. The corpus consists of 11 natural files, 4 artificial files, 3 large files, and a file with the first million digits of pi. You can also find a copyof the Calgaruy Corpus at the website, which was the defacto standard for testing lossless compression algorithms in the 1990s.
  • The UMass Trace Repository provides network, storage, and other traces to the research community for analysis. The UMass Trace Repository is supported by grant #CNS-323597 from the National Science Foundation.