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Win32.HLLW.Autoruner3.1999

Added to the Dr.Web virus database: 2020-02-11

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '%APPDATA%\EXSHELLCONFIG\csrss.exe'
Creates the following files on removable media
  • <Drive name for removable media>:\sys.exe
  • <Drive name for removable media>:\autorun.inf
Modifies file system
Creates the following files
  • %APPDATA%\exshellconfig\csrss.exe
Sets the 'hidden' attribute to the following files
  • %APPDATA%\exshellconfig\csrss.exe
  • <Drive name for removable media>:\sys.exe
  • <Drive name for removable media>:\autorun.inf
Network activity
TCP
  • 'sm##.gmail.com':587
UDP
  • DNS ASK sm##.gmail.com
Miscellaneous
Creates and executes the following
  • '%APPDATA%\exshellconfig\csrss.exe'

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