Incidents
Re: Compromised Windows Server Jun 06 2006 06:26AM
Butterworth, Jim (jim butterworth guidancesoftware com)
Just a guess, but I'd bet the behavior you're seeing is the same method with which you became infected, that is, via TCP 139 and 445. Sounds like a propogation worm.

It will morph on reboot, so use a prog like regshot or regmon to diff the registry.

Check HKLM software Microsoft windowsnt currentversion run for any new processes set to run at boot.

Use a forensic solution to get the malware back, copy it to a VM box using NAT, set the VM's gateway to your local host and sniff the traffic for signs of replication mechanism.

After you get the malware off the box, clean registry, and patch the box.

Best,

Jim Butterworth

Guidance Software

Mgr. Prof Svcs

Jim Butterworth, EnCE, GCIA

Manager, Professional Services, Southwest

*** Sent while Mobile ***

-----Original Message-----

From: Patrick Beam <patrick.beam (at) gmail (dot) com [email concealed]>

To: incidents (at) securityfocus (dot) com [email concealed] <incidents (at) securityfocus (dot) com [email concealed]>

Sent: Mon Jun 05 12:27:32 2006

Subject: Compromised Windows Server

Came in this morning to find a windows 2003 server I manage scanning the

Internet for machines listening on tcp 139 and 445. While looking at the

machine I noticed the following processes running.

Mwvsta.exe found in c:\windows\system32

rundll16.exe c:\windows\system23

Ponoas.exe c:\windows\system32

I believe that the ponoas.exe is some sort of rootkit although searching on

google for this file name returns nothing. Also searching

mwvsta.exereturns nothing. At this point I have removed these files

from the system

and registry but am weary that the server will get hit again. Has anyone

had an experience with the following file or have any idea what rookkit of

virus they are associated with?

Thanks,

Patrick

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