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Win32.HLLW.Autoruner2.33793

Added to the Dr.Web virus database: 2018-03-02

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Updat' = '"%APPDATA%\Svchost.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Updat' = '"%APPDATA%\Svchost.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\Updat.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\Updat.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\Svchost.exe' = '%APPDATA%\Svchost.exe:*:Enabled:Svchost.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\Svchost.exe" "Svchost.exe" ENABLE
Modifies file system:
Creates the following files:
  • %APPDATA%\Svchost.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Updat.exe
Network activity:
Connects to:
  • 'ha####st.linkpc.net':5552
UDP:
  • DNS ASK ha####st.linkpc.net
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Saary?naf?' WindowName: ''
  • ClassName: 'POOCEEN_W??AO?UCLAI?' WindowName: ''
  • ClassName: 'TCPV?O?Alass' WindowName: ''
  • ClassName: 'Saary?naf®' WindowName: ''
  • ClassName: 'DNSUuer?‡nifeer' WindowName: ''
  • ClassName: 'DNSUuer??nifeer' WindowName: ''
  • ClassName: 'ProcessHOcker' WindowName: ''
  • ClassName: 'PROC?XIL' WindowName: ''
Creates and executes the following:
  • '%APPDATA%\Svchost.exe'