Security Incidents mailing list archives
Re: New Trojan
From: Brian Eckman <eckman () umn edu>
Date: Mon, 27 Oct 2003 15:30:47 -0600
AFAIK, there is *no* method of removal for this trojan, due to its way of infection. Some have speculated that there is an option for removal within the trojan, but I have no confirmation of this -- try running strings on the DLL, and see if you can find anything in there (i.e. grep for 'remov', 'instal').
It can be "removed" by renaming all instances of rundll32.exe at once, so System File Protection won't replace it again. Then reboot and remove it from starting up in the registry and, if you're paranoid, overwrite the ADS stream with benign text. Then rename rundll32.exe back again.
It should be also removable by unregistering the DLL then deleting the registry entry, as was mentioned earlier in this thread. I haven't tried it though.
Brian -- Brian Eckman Security Analyst OIT Security and Assurance University of Minnesota 612-626-7737 "There are 10 types of people in this world. Those who understand binary and those who don't." --------------------------------------------------------------------------- Network with over 10,000 of the brightest minds in information security at the largest, most highly-anticipated industry event of the year. Don't miss RSA Conference 2004! Choose from over 200 class sessions and see demos from more than 250 industry vendors. If your job touches security, you need to be here. Learn more or register at http://www.securityfocus.com/sponsor/RSA_incidents_031023 and use priority code SF4. ----------------------------------------------------------------------------
Current thread:
- New Trojan Jay Castaldo (Oct 25)
- Re: New Trojan Harlan Carvey (Oct 25)
- Re: New Trojan lsi (Oct 27)
- RE: New Trojan Lucretia (Oct 28)
- RE: New Trojan Harlan Carvey (Oct 27)
- Re: New Trojan lsi (Oct 27)
- Re: New Trojan Harlan Carvey (Oct 25)
- RE: New Trojan Rob Shein (Oct 25)
- RE: New Trojan Tiago Halm (Oct 26)
- Re: New Trojan Damian Gerow (Oct 27)
- RE: New Trojan Rob Shein (Oct 28)
- Re: New Trojan Damian Gerow (Oct 28)
- Re: New Trojan Brian Eckman (Oct 28)
- Re: New Trojan Damian Gerow (Oct 28)
- Re: New Trojan Damian Gerow (Oct 28)
- Re: New Trojan Russell Fulton (Oct 28)
- RE: New Trojan Rob Shein (Oct 28)
- <Possible follow-ups>
- RE: New Trojan Jerry Heidtke (Oct 25)
- RE: New Trojan John Ives (Oct 26)
- Re: New Trojan Grzegorz (Oct 25)
- Re: New Trojan Harlan Carvey (Oct 27)
- Re: New Trojan sean (Oct 25)
- Re: New Trojan Jay Castaldo (Oct 27)
- Re: New Trojan Damian Gerow (Oct 27)