Virus:TR/Vundo.IS
Date discovered:24/07/2008
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:93.184 Bytes
MD5 checksum:ac0B91f457566dfbdaeb0904946aa1c4
IVDF version:7.00.05.160 - Thursday, July 24, 2008

 General Method of propagation:
   • No own spreading routine


Alias:
   •  Mcafee: Vundo trojan


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


Side effects:
   • Drops files
   • Registry modification
   • Third party control

 Files The following files are created:

– Non malicious files:
   • %malware execution directory%\%random character string%.tmp
   • %malware execution directory%\%random character string%.ini

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "%hex values%"="rundll32.exe \"%malware execution directory%\%malware dll%",b"



The following registry keys are added:

– [HKLM\SOFTWARE\Microsoft\%hex values%]
   • @="%hex values%"
   • "red_srv"="%internet resources used by malware%"
   • "red_srv_bckp"="%internet resources used by malware%"

– [HKLM\SOFTWARE\Microsoft\aoprndtws]
   • @="%generated CLSID%"

– [HKCU\Software\Microsoft\rdfa]
   • "F"=hex:30,00
   • "N"=hex:30,00

 Backdoor Contact server:
The following:
   • http://regters.**********

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

 Injection – It injects itself into a process.

    Process name:
   • explorer.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 Andreas Feuerstein on Wednesday, July 30, 2008
Description updated by Andreas Feuerstein on Tuesday, December 16, 2008

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