Security Incidents mailing list archives
Re: New Rootkit?
From: Eoghan Casey <eco () corpus-delicti com>
Date: Thu, 16 Oct 2003 11:45:46 -0400
This sounds like SucKIT (http://hysteria.sk/sd/f/suckit/) or a variant. This has been in general use since last year. It injects itself directly into kernel memory rather than using kernel loadable modules.
See the README (http://hysteria.sk/sd/f/suckit/readme): Q: How I can make suckit to run automatically each reboot of machine ? A: The generic way (as the install script does) is to rename /sbin/init to /sbin/init<hidesuffix>, and place sk binary instead of /sbin/init, so suckit will get resident imediatelly after boot. However, when it will get resident, all of such changes will be stealthed ;) If you can't fiddle with /sbin/init, youstill can place binary to somewhere into /etc/rc.d/rc3.d/S##<hidesuffix>
or such. Eoghan CaseyOn Thursday, October 16, 2003, at 03:38 AM, Jonas Frey (Probe Networks) wrote:
Hello, we've just had a customer machine blasing some 50mbit into our lines with pretty high pps counts. After a short analysis we found out the init got replaced/backdoored and the original init was moved to /sbin/telinit. However the filesize on both files was the same. This is probably due to a lkm the rootkit uses to hide its existence. Chkrootkit did NOT find this rootkit. However it pointed us the right way saying the system had hidden processes running. After replacing init with a good version and updating the kernel we rebooted the box and found the hacked init as well as other programs of the rootkit beeing located in /etc/.MG/ (this directory was hidden before). Apparently this is a rootkit with a ddosnet touch. I've put up the files for further analysis at: http://81.2.144.1/rootkit/-- Mit freundlichen Grüßen / With kind regards,Jonas Frey----------------------------------------------------------------------- ----FREE Whitepaper: Better Management for Network Security Looking for a better way to manage your IP security? Learn how Solsoft can help you: - Ensure robust IP security through policy-based management - Make firewall, VPN, and NAT rules interoperable across heterogeneous networks - Quickly respond to network events from a central console Download our FREE whitepaper at: http://www.securityfocus.com/sponsor/Solsoft_incidents_031015----------------------------------------------------------------------- -----
--------------------------------------------------------------------------- FREE Whitepaper: Better Management for Network Security Looking for a better way to manage your IP security? Learn how Solsoft can help you: - Ensure robust IP security through policy-based management - Make firewall, VPN, and NAT rules interoperable across heterogeneous networks - Quickly respond to network events from a central console Download our FREE whitepaper at: http://www.securityfocus.com/sponsor/Solsoft_incidents_031015 ----------------------------------------------------------------------------
Current thread:
- New Rootkit? Frey (Probe Networks) (Oct 16)
- Re: New Rootkit? Thorsten Holz (Oct 16)
- Re: New Rootkit? Eoghan Casey (Oct 16)
- Re: New Rootkit? Alvin Wong (Oct 17)
- Re: New Rootkit? Russell Harding (Oct 19)
- Re: New Rootkit? Alvin Wong (Oct 17)
- Re: New Rootkit? Jeffrey Denton (Oct 16)