Full Disclosure mailing list archives
Trojan found on Linux server
From: "Gaddis, Jeremy L." <jeremy () linuxwiz net>
Date: Mon, 02 Jan 2006 16:31:12 -0500
After having a customer report that he had large amounts of outbound traffic from one of his Linux servers, I began to investigate and found a trojan.
The trojan had created a crontab for the "nobody" user (Apache was running as nobody and, while I did not take the time to verify I believe that Apache was probably the way the intruder got in) which, at 24 minutes after the hour, would write itself out to /tmp/ummtodkhk and then execute itself.
The /tmp/ummtodkhk file was packed with UPX. It has been unpacked and made available at http://www.jeremygaddis.com/files/ummtodkhk. It was submitted to VirusTotal, but nothing identified as anything known.
The results of `crontab -l -u nobody >> nobody.cron` are available at http://www.jeremygaddis.com/files/nobody.cron.
-j -- Jeremy L. Gaddis, GCWN, Linux+, Network+ LinuxWiz Consulting http://www.linuxwiz.net/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Trojan found on Linux server Gaddis, Jeremy L. (Jan 02)
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