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Virus:WORM/Ainslot.A.599
Date discovered:02/05/2011
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
File size:634.880 Bytes
MD5 checksum:D04CCAABBAC35FE15120DC30A8EE1A8E
VDF version:7.11.07.107 - Monday, May 2, 2011
IVDF version:7.11.07.107 - Monday, May 2, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: W32/Ainslot.b
   •  Kaspersky: Trojan.Win32.Jorik.Shakblades.vj
   •  TrendMicro: TROJ_SPNR.03GK11
   •  Sophos: Mal/Jorik-G
   •  Microsoft: Worm:Win32/Ainslot.A


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


Side effects:
   • Drops files
   • Registry modification

 Files It copies itself to the following location:
   • %APPDATA%\O9IDCPTEQC.exe



The following file is created:

– %APPDATA%\data.dat This file serves as flag for an internal routine.

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

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\
   run]
   • "Windows Defender"="%APPDATA%\O9IDCPTEQC.exe"

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Defender"="%APPDATA%\O9IDCPTEQC.exe"

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Defender"="%APPDATA%\O9IDCPTEQC.exe"

 Injection – It injects itself as a remote thread 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 Andrei Ilie on Tuesday, July 26, 2011
Description updated by Andrei Ilie on Tuesday, July 26, 2011

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