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Profile

Win32.HLLW.Siggen.5913

Added to the Dr.Web virus database: 2016-07-08

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • <LS_APPDATA>\Start\update_backup.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
Executes the following:
  • '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES2.tmp" "%TEMP%\vbc1.tmp"
  • '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\1fnxkq3b.cmdline"
  • '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES4.tmp" "%TEMP%\vbc3.tmp"
  • '%TEMP%\update.exe'
  • '%TEMP%\svchost.exe'
  • '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\zlyivs7d.cmdline"
Modifies file system:
Creates the following files:
  • %TEMP%\ynBszVri.resources
  • %TEMP%\whatdafock.txt
  • %TEMP%\C.resources
  • %TEMP%\RES2.tmp
  • %TEMP%\zlyivs7d.exe
  • %TEMP%\vbc3.tmp
  • %TEMP%\RES4.tmp
  • %TEMP%\1fnxkq3b.out
  • %TEMP%\1fnxkq3b.0.vb
  • %TEMP%\1fnxkq3b.cmdline
  • <LS_APPDATA>\Start\update.exe
  • %TEMP%\o2cj7.resources
  • %TEMP%\svchost.exe
  • %TEMP%\busSMFMbH.resources
  • %TEMP%\update.exe
  • %TEMP%\zlyivs7d.out
  • %TEMP%\vbc1.tmp
  • %TEMP%\zlyivs7d.cmdline
  • %TEMP%\MSNPSharp.dll
  • %TEMP%\zlyivs7d.0.vb
Deletes the following files:
  • %TEMP%\zlyivs7d.cmdline
  • %TEMP%\zlyivs7d.exe
  • %TEMP%\vbc3.tmp
  • %TEMP%\RES4.tmp
  • %TEMP%\vbc1.tmp
  • %TEMP%\RES2.tmp
  • %TEMP%\zlyivs7d.out
  • %TEMP%\zlyivs7d.0.vb
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''