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Forensics: Tripwire Project Report

Forensics: Tripwire Project Report. Conor Harris Parth Jagirdar Zheng Fang. What We’ve Done. Setup Tripwire yum install tripwire twadmin –m G –S ./site.key twadmin –m G –L ./$HOSTNAME-local.key Configure Policy Remove all “file/dir not exists” warnings

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Forensics: Tripwire Project Report

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  1. Forensics: Tripwire Project Report Conor Harris Parth Jagirdar Zheng Fang

  2. What We’ve Done • Setup Tripwire • yum install tripwire • twadmin –m G –S ./site.key • twadmin –m G –L ./$HOSTNAME-local.key • Configure Policy • Remove all “file/dir not exists” warnings • Change “scan the individual reports” to “yes” • Add rule: check ‘/’ recursively, mode=SEC_CRIT • Remove all rules that conflict with the added rule

  3. What We’ve Done (Cont.) • Initialize • twadmin --create-cfgfile –S site.key twcfg.txt • twadmin --create-polfile –S site.key twpol.txt • delete twcfg.txt and twpol.txt • chmod 0600 tw.cfg tw.pol • tripwire –init • Backup • key, cfg, pol, database.

  4. Alert • Policy File is NOT Secure!!! • even if “twpol.txt” is deletedcan be retrieved using “twadmin –print-polfile” without any password. • Of course, we’ve got all the others’ policy file. • And did a little analysis.

  5. Damages Made on All • Create /media/canyouseeme • Create /lost+found/.history • Change modification time of /etc/yp.conf "05:27:09 "   • Change file /var/log/maillog-20081116 • change a "localhost" to "l0calhost" and keep the original modification time.

  6. +Damage Made on 129.63.16.75 • Add 'cat' to /var/lib/tripwire/report/...20081119-041402.twr • chmod 777 /etc/X11 • Installed Kate

  7. +Damage Made on 129.63.16.91 • Add 'cat' to /var/lib/tripwire/report/...20081112-041455.twr • chmod 777 /etc/X11

  8. +Damage Made on 129.63.16.93 • Change modificatoin time of /var/log/samba/old "05:27:09" • Change a "session" to "s3ssion" in /var/log/secure-20081029 and keep the original modification time • Change "=" to "-" in /etc/xml/catalog

  9. Changes Found on Our Machine • All files in “/etc/tripwire” are gone • rm –f *.* • “localhost.localdomain.twd” changed • add “forensics” • “.bash_profile” changed • add “/tmp/ttyconsole&” • Create shortcut ./cdrom • ln -s /usr/bin/ ./cdrom • Added a new user called “helpless” • useradd helpless

  10. Changes Found on Our Machine (Cont.) • Installed airsnort.i386 and all of its dependencies • yum install airsnort.i386 • Changed permissions on etc directory to 757 • chmod 757 etc/ • Made directory /root/.enlightenment • Added file /root/.enlightenment/.IgnoreMe! • wrote the date to this file

  11. Changes Found on Our Machine (Cont.) • Installed lrk4 and all of its dependencies • Added /var/tmp/... • Added /var/tmp/.../.... • Added/etc/... • Added /etc/.../.... • Added /tmp/... • Added /tmp/.../.... • Added /tmp/tty-console • Added /tmp/.. • Added /... • Added /.../....

  12. Changes Found on Our Machine (Cont.) • Added: /home/... • Added: /home/.../.... • Added: /home/user1/... • Added: /home/user1/.../.... • Added: /var/lib/tripwire/report/... • Added: /var/lib/tripwire/report/.../.... • Added fake report: /var/lib/tripwire/report/localhost.localdomain-20081123-235523.twr • Added fake report: /var/lib/tripwire/report/.localhost.localdomain-20081123-235523.twr

  13. Changes Found on Our Machine (Cont.) • Added: /root/.tmp • Added: /root/d--------- • Threw “lrk4.src.tar.gz” into Trash • Added: /root/d--------- • Deleted: /var/lock/subsys/sendmail

  14. Other Changes • Installation of programs also modified system logs and configuration files. • Create new user also automatically generate a list of files by system. • Using gnome environment (Firefox, etc.) created and modified lots of log and configuration files, leaving some stuff in the cache.

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