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Win32.HLLW.Autoruner2.52475

Added to the Dr.Web virus database: 2019-07-17

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\software\Microsoft\Windows\CurrentVersion\Run] '4cd071c8714b30ad2e17828cfd4364c9' = '"%TEMP%\server.exe" ..'
  • [<HKLM>\software\Microsoft\Windows\CurrentVersion\Run] '4cd071c8714b30ad2e17828cfd4364c9' = '"%TEMP%\server.exe" ..'
Creates or modifies the following files
  • %APPDATA%\microsoft\windows\start menu\programs\startup\4cd071c8714b30ad2e17828cfd4364c9.exe
Creates the following files on removable media
  • <Drive name for removable media>:\4cd071c8714b30ad2e17828cfd4364c9.exe
  • <Drive name for removable media>:\autorun.inf
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 "%TEMP%\server.exe" "server.exe" ENABLE
Modifies file system
Creates the following files
  • %TEMP%\server.exe
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\4cd071c8714b30ad2e17828cfd4364c9.exe
  • <Drive name for removable media>:\autorun.inf
  • %TEMP%\server.exe
  • %APPDATA%\microsoft\windows\start menu\programs\startup\4cd071c8714b30ad2e17828cfd4364c9.exe
Miscellaneous
Creates and executes the following
  • '%TEMP%\server.exe'
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\server.exe" "server.exe" ENABLE' (with hidden window)

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