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Date discovered:19/10/2010
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:454.656 Bytes
MD5 checksum:876eda673046154a667a11295932040b
VDF version:
IVDF version:

 General Method of propagation:
   • Autorun feature

   •  Sophos: W32/Agent-PAV
   •  Bitdefender: Worm.Generic.273622
   •  Panda: W32/Autorun.JVV
   •  Eset: MSIL/Autorun.Agent.Q

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

Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following locations:
   • %drive%\windows\system32\ultrafx.exe
   • %drive%\windows\system32\suchost.exe
   • %drive%\ultrafx.exe

The following file is created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

It tries to execute the following files:

– Filename:
   • %SYSDIR%\suchost.exe

– Filename:
   • %SYSDIR%\ultrafx.exe

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Sound driver"="%SYSDIR%\suchost.exe"
   • "Video Card"="%SYSDIR%\ultrafx.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Sound driver"="%SYSDIR%\suchost.exe"
   • "Video Card"="%SYSDIR%\ultrafx.exe"

The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Windows]
   • "mID"="442ddbd9-1984-4a81-9091-2dde5a9f650f"
   • "vs"="15"

The following registry keys are changed:

– [HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server]
   New value:
   • "fDenyTSConnections"=dword:0x00000000

– [HKLM\SYSTEM\CurrentControlSet\Control\Lsa]
   New value:
   • "limitblankpassworduse"=dword:0x00000000

– [HKLM\SYSTEM\CurrentControlSet\Control\Windows]
   New value:
   • "ErrorMode"=dword:0x00000002

 Backdoor Contact server:
The following:
   • (TCP)

 Miscellaneous Accesses internet resources:
   • http://lookingforfun.blo**********.org/

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

Description inserted by Petre Galan on Thursday, February 24, 2011
Description updated by Petre Galan on Thursday, February 24, 2011

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