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Date discovered:22/06/2009
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:32.768 Bytes
MD5 checksum:08fb2ad78b684627acabdbc2493498ab
IVDF version:

 General Method of propagation:
• Autorun feature

   •  Mcafee: W32/Autorun.worm.i.gen virus
   •  Sophos: W32/Autorun-AVG
   •  Panda: W32/AutoRun.DJ.worm
   •  Bitdefender: Worm.Generic.71434

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

Side effects:
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files The following file is created:

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


 Registry The following registry key is added:

– [HKCU\Software\VB and VBA Program Settings\NahsOR\NahsOR]
   • "NahsOR"="%current date%"

 Miscellaneous String:
Furthermore it contains the following strings:
   • 10th day or day
   • \system32\shutdown.exe -f
   • DisableTaskMgr
   • NoFolderOptions
   • SearchHidden
   • DisableRegistryTools
   • NoRun
   • DisableCmd
   • DisableSR
   • DisableConfig
   • AutoEndTasks

 File details Programming language:
The malware program was written in Visual Basic.

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 Monday, December 14, 2009
Description updated by Petre Galan on Monday, December 14, 2009

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