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Added to the Dr.Web virus database: 2011-03-03

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,<SYSTEM32>\mstap32.exe'
Creates the following files on removable media
  • <Drive name for removable media>:\usbmon.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions
To complicate detection of its presence in the operating system,
blocks the following features:
  • User Account Control (UAC)
Modifies file system
Creates the following files
  • <SYSTEM32>\mstap32.exe
  • <SYSTEM32>\htdns.dll
  • <SYSTEM32>\msmon.exe
  • %TEMP%\dbg.txt
  • C:\usbmon.exe
  • C:\autorun.inf
  • D:\usbmon.exe
  • D:\autorun.inf
Sets the 'hidden' attribute to the following files
  • <SYSTEM32>\mstap32.exe
  • <SYSTEM32>\htdns.dll
Network activity
Creates and executes the following
  • '<SYSTEM32>\mstap32.exe'

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Doctor Web is the Russian developer of Dr.Web anti-virus software. Dr.Web anti-virus software has been developed since 1992.

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