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Win32.HLLW.Silka.17
Added to the Dr.Web virus database:
2010-07-05
Virus description added:
2011-08-19
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Adobe Flash ActiveX' = '"%TEMP%\lsass.exe"'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Adobe Flash ActiveX' = '"%TEMP%\lsass.exe"'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
<Drive name for removable media>:\TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\Desktop.ini
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '"%TEMP%\lsass.exe"' = '"%TEMP%\lsass.exe:*:Enabled:uid32"'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:uid32'
Modifies file system :
Creates the following files:
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\TTHDHGC\DFG-2352-66235-2352322-634621321-6662355\364855.exe
%TEMP%\lsass.exe
Network activity:
Connects to:
'ld.###kivarsin.org':1578
'ft#.#ripod.com':21
UDP:
DNS ASK ld.###kivarsin.org
DNS ASK ft#.#ripod.com
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
ClassName: 'MS_WINHELP' WindowName: ''
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