Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '<Full path to virus>'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\yeawr.exe
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yeawr.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%\yg7mkynx.cmdline"
Terminates or attempts to terminate
the following user processes:
- ge.exe
- outpost.exe
- zlclient.exe
- bdagent.exe
Modifies file system :
Creates the following files:
- %TEMP%\CSC1.tmp
- %TEMP%\RES2.tmp
- %TEMP%\yg7mkynx.dll
- %TEMP%\yg7mkynx.out
- %APPDATA%\svchost.exe
- %TEMP%\yg7mkynx.0.cs
- %TEMP%\yg7mkynx.cmdline
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yeawr.exe
Deletes the following files:
- %TEMP%\yg7mkynx.cmdline
- %TEMP%\yg7mkynx.0.cs
- %TEMP%\yg7mkynx.out
- %TEMP%\RES2.tmp
- %TEMP%\CSC1.tmp
- %TEMP%\yg7mkynx.dll
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
