Virus:TR/BHO.czo
Date discovered:24/07/2008
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:No
File size:~313.856 Bytes
IVDF version:7.00.05.160 - Thursday, July 24, 2008

 General Method of propagation:
   • No own spreading routine


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops a file
   • Registry modification

 Files The following file is created:

– Non malicious file:
   • %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-602162358-2077806209-839522115-1003

 Registry The following registry key is added in order to run the process after reboot:

– [HKCR\CLSID\{2091569e-6d42-33a3-3e35-602d17233ca3}\InProcServer32]
   • @="%malware execution directory%\%malware dll%"
   • "ThreadingModel"="Apartment"



It registers a browser helper object (BHO) by adding the following key:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{2091569e-6d42-33a3-3e35-602d17233ca3}]
   • "NoExplorer"="\"\""

 File details Programming language:
 The malware program was written in MS Visual C++.

Description inserted by Thomas Wegele on Tuesday, August 5, 2008
Description updated by Thomas Wegele on Wednesday, August 20, 2008

Back . . . .