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Win32.HLLW.Autoruner2.45410

Added to the Dr.Web virus database: 2018-08-15

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'dwm.exe' = '"%ALLUSERSPROFILE%\dwm.exe" ..'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'dwm.exe' = '"%ALLUSERSPROFILE%\dwm.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\dwm.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\dwm.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>\taskkill.exe' /F /IM wscript.exe
  • '<SYSTEM32>\taskkill.exe' /F /IM cmd.exe
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\cmd.exe
Modifies file system:
Creates the following files:
  • <SYSTEM32>\ctfmon.exe.new
  • %ALLUSERSPROFILE%\dwm.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\dwm.exe
  • %ALLUSERSPROFILE%\dwm.exe
Moves the following system files:
  • from <SYSTEM32>\ctfmon.exe to %TEMP%\86651
Moves the following files:
  • from <STUBS_DIR>\ecmd\ecmd.exe to %TEMP%\75745
  • from %HOMEPATH%\Start Menu\Programs\Startup\desktop.ini to %TEMP%\28115
  • from %HOMEPATH%\Start Menu\Programs\Startup\Shortcut to startup_local.lnk to %TEMP%\40676
  • from %HOMEPATH%\Start Menu\Programs\Startup\desktop.ini to %TEMP%\76284
  • from %HOMEPATH%\Start Menu\Programs\Startup\Shortcut to startup_local.lnk to %TEMP%\89110
Network activity:
Connects to:
  • 'ne####zon.ddns.net':2222
UDP:
  • DNS ASK ne####zon.ddns.net
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''
  • ClassName: '' WindowName: 'AngarCl'
Creates and executes the following:
  • '%ALLUSERSPROFILE%\dwm.exe' and Settings\\All Users\\dwm.exe\"
Executes the following:
  • '<SYSTEM32>\schtasks.exe' /Delete /tn NYANP /F
  • '<SYSTEM32>\schtasks.exe' /create /tn NYANP /tr \"C:\\bf32d3b0\\<File name>.exe\" /sc minute /mo 5
  • '<SYSTEM32>\schtasks.exe' /create /tn NYANP /tr \"C:\\Documents and Settings\\All Users\\dwm.exe\" /sc minute /mo 5