Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\filename.vbs
Creates the following files on removable media
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\sys.exe
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe
Modifies file system
Creates the following files
- %APPDATA%\subfolder\filename.exe
- %APPDATA%\pid.txt
- %APPDATA%\pidloc.txt
Sets the 'hidden' attribute to the following files
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\sys.exe
Network activity
UDP
- DNS ASK wh#####yipaddress.com
Miscellaneous
Executes the following
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holdermail.txt"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holderwb.txt"
