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Added to the Dr.Web virus database: 2011-12-02

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'WINDOWS' = '%TEMP%\EncryptedFile.exe'
  • [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\] 'Windows Firewall' = '%APPDATA%\lsass.exe'
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\] 'Windows Firewall' = '%APPDATA%\lsass.exe'
  • [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'WINDOWS' = '%APPDATA%\lsass.exe'
Creates the following files on removable media
  • <Drive name for removable media>:\tthdhgc\dfg-2352-66235-2352322-634621321-6662355\desktop.ini
  • <Drive name for removable media>:\tthdhgc\dfg-2352-66235-2352322-634621321-6662355\364855.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions
Injects code into
the following user processes:
  • lsass.exe
Modifies file system
Creates the following files
  • %TEMP%\encryptedfile.exe
  • %APPDATA%\lsass.exe
Sets the 'hidden' attribute to the following files
  • %APPDATA%\lsass.exe
  • <Drive name for removable media>:\tthdhgc\dfg-2352-66235-2352322-634621321-6662355\364855.exe
Network activity
Connects to
  • '<LOCALNET>.0.0':445
  • '<LOCALNET>.0.0':139
  • '<LOCALNET>.0.0':80
Creates and executes the following
  • '%TEMP%\encryptedfile.exe'
  • '%APPDATA%\lsass.exe'
  • '%APPDATA%\lsass.exe' ' (with hidden window)

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