Security Incidents mailing list archives

Re: wmon16.exe


From: Harlan Carvey <keydet89 () yahoo com>
Date: Mon, 10 May 2004 08:21:29 -0700 (PDT)



I believe that I have a HUGE problem, and I can't
find anything anywhere.  
Here are our symptoms:

- C:\winnt\system32\wmon16.exe appeared and began
running (no idea what it is or does)

Is there a startup entry for wmon16.exe, either in the
Registry or StartUp folders?

Also, have you sent a copy of the file to your
anti-virus vendor?

- hosts file was altered to redirect antivirus sites
to 127.0.0.1 (similar 
to Trojan.QHOST but nothing else matches
- disables antivirus

What does?  wmon16.exe?  Are you sure?

- creates lots of connections to network computers
using microsoft-ds and netbios ports

What does?  wmon16.exe?  Have you used fport.exe or
openports.exe to confirm this?  Also, are these the
source or destination ports?

I am completely lost.  No removal tools have worked,
no A/V is picking it 
up.  I've got about four hosts with these symptoms
(so far) and I'm just 
unplugging network cables at this point.  Anyone
with any pointers?

A little digital detective work will help you tie the
symptoms to the file you found, if that is in fact the
case.  Kill the process, remove any Startup entries,
and restart a machine.  If the process returns, then
you need to dig deeper.

HTH,

Harlan


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