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Win32.HLLW.Autoruner1.26213

Added to the Dr.Web virus database: 2012-09-18

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Media Starter' = '<SYSTEM32>\wmpls64.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\~Config.{645FF040-5081-101B-9F08-00AA002F954E}\cfg-x93051059.np
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List] '<SYSTEM32>\wmpls64.exe' = '<SYSTEM32>\wmpls64.exe:*:Enabled:Windows Media Starter'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\wmpls64.exe' = '<SYSTEM32>\wmpls64.exe:*:Enabled:Windows Media Starter'
Creates and executes the following:
  • <SYSTEM32>\wmpls64.exe <Full path to virus>
Executes the following:
  • <SYSTEM32>\sc.exe config OutpostFirewall start= disabled
  • <SYSTEM32>\sc.exe stop OutpostFirewall
  • <SYSTEM32>\net1.exe stop OutpostFirewall
  • <SYSTEM32>\sc.exe delete OutpostFirewall
  • <SYSTEM32>\net.exe stop OutpostFirewall
  • <SYSTEM32>\sc.exe delete NOD32krn
  • <SYSTEM32>\sc.exe config NOD32krn start= disabled
  • <SYSTEM32>\sc.exe delete ekrn
  • <SYSTEM32>\sc.exe config ekrn start= disabled
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Searches for windows to
detect analytical utilities:
  • ClassName: 'PROCMON_WINDOW_CLASS' WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
detect programs and games:
  • ClassName: 'gdkWindowToplevel' WindowName: 'The Wireshark Network Analyzer'
Hides the following processes:
  • <Full path to virus>
  • <SYSTEM32>\wmpls64.exe
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\n0x4a[1].txt
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\n0x2a[1].zip
  • <SYSTEM32>\wmpls64.exe
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\wmpls64.exe
Deletes itself.
Network activity:
Connects to:
  • '45.##.235.74':5213
  • '20#.#1.237.59':80
  • '45.##.235.77':5949
  • '1.##6.35.98':80
  • '45.##.235.76':52311
TCP:
HTTP GET requests:
  • 20#.#1.237.59/aspnet_client/ip/n0x4a.txt
  • 1.##6.35.98/css/n0x2a.zip
UDP:
  • DNS ASK 02#.#rofunda.su
  • DNS ASK 01#.#rofunda.su
  • DNS ASK fi##.#atrensis.su
  • DNS ASK 03#.#rofunda.su
Miscellaneous:
Searches for the following windows:
  • ClassName: 'TCPViewClass' WindowName: ''
  • ClassName: '#32770' WindowName: 'Regshot 1.8.2'
  • ClassName: 'PROCEXPL' WindowName: ''
  • ClassName: 'CNetmonMainFrame' WindowName: 'Microsoft Network Monitor 3.3'
  • ClassName: 'SmartSniff' WindowName: 'SmartSniff'
  • ClassName: 'CurrPorts' WindowName: 'CurrPorts'

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