RE: Possible New Malware

["Perrymon, Josh L." <PerrymonJ () bek com>]

After sending the file to the link below this is what we found.
 <http://www.kaspersky.com/scanforvirus>
http://www.kaspersky.com/scanforvirus 
 
I'm awaiting the binary to review.
 
It probably came in on a laptop and spread to machines unpatched to MS04-11.
W32/Forbot-C is a worm which attempts to spread to remote network shares.
The worm also contains backdoor Trojan functionality, allowing unauthorised
remote access to the infected computer via IRC channels while running in the
background as a service process. 

W32/Forbot-C moves itself to the Windows system folder as winitr32.exe
andcreates the following registry entries to run itself on system logon: 

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Win32 Wmls Driver = winitr32.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Win32 Wmls Driver = winitr32.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Win32 Wmls Driver = winitr32.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Win32 Wmls Driver = winitr32.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Win32 Wmls Driver = winitr32.exe 

W32/Forbot-C attempts to spread to network machines using various exploits
including the LSASS vulnerability (please see MS04-011
<http://www.microsoft.com/technet/security/bulletin/MS04-011.mspx> ). 

W32/Forbot-C attempts to terminate several processes related to anti-virus
and security related software. 

 

-----Original Message-----
From: Perrymon, Josh L. [mailto:PerrymonJ () bek com] 
Sent: Tuesday, September 14, 2004 9:02 AM
To: full-disclosure () lists netsys com
Subject: [Full-disclosure] Possible New Malware



Anyone Heard of BackDoor-CIW? 

This is a piece of malware with the .exe of winstr32.exe that is causing 99%
CPU on a couple machine at a remote location. I found that one infected
machine does not have MS04-11 patched. So that could be an attack vector.

I get no luck googling for the .exe or BackDoor-CIW   <----  This is what
Postini identifies the file as. 

I'm trying to get a copy to put in my VMWare Lab. 


Also----   Isn't there a website that we can email this file to and it will
run several AV solutions on it to find more info?


Joshua Perrymon 
Sr. Network Security Consultant 

PGP Fingerprint 
51B8 01AC E58B 9BFE D57D  8EF6 C0B2 DECF EC20 6021 

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