Virus:TR/Spy.ZBot.bth
Date discovered:19/11/2008
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:No
File size:~ 56.320 Bytes
IVDF version:7.01.00.106 - Wednesday, November 19, 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:
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %SYSDIR%\ntos.exe



The following files are created:

– Temporary files that might be deleted afterwards:
   • %SYSDIR%\wnspoem\video.dll
   • %SYSDIR%\wnspoem\audio.dll

 Registry The following registry key is changed:

– [HKLM\software\microsoft\windows nt\currentversion\winlogon]
   Old value:
   • userinit="%SYSDIR%\userinit.exe,"
   New value:
   • userinit="%SYSDIR%\userinit.exe,%SYSDIR%\ntos.exe,"

 Backdoor The following port is opened:

– svchost.exe on a random TCP port


Contact server:
The following:
   • http://aerophotodarkcity-newway.com/**********/cfg.bin

As a result it may send information and remote control could be provided.

 Injection – It injects itself into a process.

    Process name:
   • winlogon.exe


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


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Thomas Wegele on Wednesday, November 19, 2008
Description updated by Thomas Wegele on Wednesday, November 19, 2008

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