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Date discovered:15/11/2010
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:56.832 Bytes
MD5 checksum:400ab8f23844227443cc309c472844dd
VDF version:
IVDF version:

 General Method of propagation:
   • Messenger

   •  Mcafee: W32/YahLover.worm
   •  Kaspersky: Backdoor.Win32.IRCBot.rbe
   •  TrendMicro: WORM_SLENFBOT.DA
   •  F-Secure: Backdoor.Bot.131406
   •  Sophos: Mal/PushBot-A
   •  Bitdefender: Backdoor.Bot.131406

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7

Side effects:
   • Drops files
   • Lowers security settings
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %WINDIR%\nvsvc32.exe

 Registry To each registry key one of the values is added in order to run the processes after reboot:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"

–  [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\
   • "NVIDIA driver monitor"="%WINDIR%\nvsvc32.exe"

The following registry keys are added:

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   • "Start Page"=""

– [HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   • "%malware execution directory%\%executed file%"="%WINDIR%\nvsvc32.exe:*:Enabled:NVIDIA driver monitor"

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   • "%malware execution directory%\%executed file%"="%WINDIR%\nvsvc32.exe:*:Enabled:NVIDIA driver monitor"

The following registry key is changed:

– [HKLM\SYSTEM\ControlSet001\Services\wuauserv]
   Old value:
   • "Start"=dword:00000002
   New value:
   • "Start"=dword:00000004

 Messenger It is spreading via Messenger. The characteristics are described below:

– Yahoo Messenger

The sent message looks like one of the following:

   • You have only 3 minutes to fill out the selected survey
or you will not have access to your account.
     You have only 3 minutes to fill out the selected survey
or you will be banned from this site.

 IRC – Furthermore it has the ability to perform actions such as:
    • Join IRC channel
    • Leave IRC channel

 Stealing – A logging routine is started after the following website is visited, which contains one of the following substrings in the URL:

 Miscellaneous  Checks for an internet connection by contacting the following web sites:

 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 Andrei Ilie on Wednesday, March 23, 2011
Description updated by Andrei Ilie on Friday, April 1, 2011

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