Win32.HLLW.Autoruner.55300
Added to the Dr.Web virus database:
2011-07-29
Virus description added:
2011-07-30
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%APPDATA%\<Virus name>.exe'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\UPRtJrz.exe
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\UPRtJrz.exe
Malicious functions:
Executes the following:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:"%TEMP%\RES2.tmp"" "%TEMP%\CSC1.tmp"
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\csc.exe /noconfig /fullpaths @"%TEMP%\tfomntnb.cmdline"
Modifies file system :
Creates the following files:
- %TEMP%\RES2.tmp
- %TEMP%\tfomntnb.dll
- %APPDATA%\<Virus name>.exe
- %TEMP%\CSC1.tmp
- %TEMP%\tfomntnb.0.cs
- %TEMP%\tfomntnb.cmdline
- %TEMP%\tfomntnb.out
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\UPRtJrz.exe
Deletes the following files:
- %TEMP%\tfomntnb.dll
- %TEMP%\tfomntnb.out
- %TEMP%\tfomntnb.cmdline
- %TEMP%\RES2.tmp
- %TEMP%\CSC1.tmp
- %TEMP%\tfomntnb.0.cs
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
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