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Win32.HLLW.Autoruner.64322

Added to the Dr.Web virus database: 2011-10-20

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Audio Driver' = '%APPDATA%\audiohd.exe'
  • [<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows-Network Component' = '<SYSTEM32>\WUDHosts.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Audio Driver' = '%APPDATA%\audiohd.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows-Network Component' = '<SYSTEM32>\WUDHosts.exe'
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Executes the following
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram <Full path to file> http-bot ENABLE
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram %APPDATA%\audiohd.exe http-bot ENABLE
Modifies file system
Creates the following files
  • %APPDATA%\audiohd.exe
  • <SYSTEM32>\wudhosts.exe
Sets the 'hidden' attribute to the following files
  • %APPDATA%\audiohd.exe
  • <SYSTEM32>\wudhosts.exe
Network activity
UDP
  • DNS ASK di###-things.at
Miscellaneous
Creates and executes the following
  • '%APPDATA%\audiohd.exe'
  • '<SYSTEM32>\wudhosts.exe'
  • '<SYSTEM32>\cmd.exe' /C netsh firewall add allowedprogram <Full path to file> http-bot ENABLE' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f' (with hidden window)
  • '%APPDATA%\audiohd.exe' ' (with hidden window)
  • '<SYSTEM32>\wudhosts.exe' ' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C netsh firewall add allowedprogram %APPDATA%\audiohd.exe http-bot ENABLE' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /C netsh firewall add allowedprogram <Full path to file> http-bot ENABLE
  • '<SYSTEM32>\cmd.exe' /C reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f
  • '<SYSTEM32>\cmd.exe' /C reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f
  • '<SYSTEM32>\cmd.exe' /C reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f
  • '<SYSTEM32>\cmd.exe' /C reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows Audio Driver" /t REG_SZ /d "%APPDATA%\audiohd.exe" /f
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows-Network Component" /t REG_SZ /d "<SYSTEM32>\WUDHosts.exe" /f
  • '<SYSTEM32>\cmd.exe' /C netsh firewall add allowedprogram %APPDATA%\audiohd.exe http-bot ENABLE

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