Home page logo
/

fulldisclosure logo 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/


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault