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Win32.HLLW.Autohit.12747

Added to the Dr.Web virus database: 2011-06-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe csrcs.exe'
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Creates and executes the following:
  • <SYSTEM32>\csrcs.exe 
Executes the following:
  • <SYSTEM32>\ping.exe -n 5 -w 250 127.0.0.1
  • <SYSTEM32>\cmd.exe /c "%TEMP%\suicide.bat"
Modifies file system :
Creates the following files:
  • %TEMP%\aut2.tmp
  • %TEMP%\rtrkcfk
  • %TEMP%\suicide.bat
  • %TEMP%\aut1.tmp
  • %TEMP%\ucchfjo
  • <SYSTEM32>\csrcs.exe
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\csrcs.exe
Deletes the following files:
  • %TEMP%\aut2.tmp
  • %TEMP%\rtrkcfk
  • %TEMP%\aut1.tmp
  • %TEMP%\ucchfjo
Deletes itself.

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