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Profile

Win32.HLLW.Siggen.6404

Added to the Dr.Web virus database: 2016-08-26

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%\ic1ijj3p.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%\2xulbiz9.cmdline"
Modifies file system:
Creates the following files:
  • %TEMP%\KyxzCvR.resources
  • %TEMP%\whatdafock.txt
  • %TEMP%\ZZkPhfwu.resources
  • %TEMP%\RES2.tmp
  • %TEMP%\2xulbiz9.exe
  • %TEMP%\vbc3.tmp
  • %TEMP%\RES4.tmp
  • %TEMP%\ic1ijj3p.out
  • %TEMP%\ic1ijj3p.0.vb
  • %TEMP%\ic1ijj3p.cmdline
  • <LS_APPDATA>\Start\update.exe
  • %TEMP%\2k75w08.resources
  • %TEMP%\svchost.exe
  • %TEMP%\wl.resources
  • %TEMP%\update.exe
  • %TEMP%\2xulbiz9.out
  • %TEMP%\vbc1.tmp
  • %TEMP%\2xulbiz9.cmdline
  • %TEMP%\MSNPSharp.dll
  • %TEMP%\2xulbiz9.0.vb
Deletes the following files:
  • %TEMP%\2xulbiz9.cmdline
  • %TEMP%\2xulbiz9.0.vb
  • %TEMP%\vbc3.tmp
  • %TEMP%\RES4.tmp
  • %TEMP%\vbc1.tmp
  • %TEMP%\RES2.tmp
  • %TEMP%\2xulbiz9.exe
  • %TEMP%\2xulbiz9.out
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '' WindowName: ''