Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '@h@' = 'wscript.exe //B "%TEMP%\@h@.vbs"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '@h@' = 'wscript.exe //B "%TEMP%\@h@.vbs"'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\@h@.vbs
Creates the following files on removable media:
- <Drive name for removable media>:\@h@.vbs
Malicious functions:
Creates and executes the following:
- '<SYSTEM32>\wscript.exe' "%TEMP%\@h@.vbs"
Executes the following:
- '%TEMP%\HS50Tool.exe'
Modifies file system:
Creates the following files:
- %TEMP%\HS50Tool.exe
- %TEMP%\@h@.vbs
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\@h@.vbs
Network activity:
Connects to:
- 'sy#####ysis.linkpc.net':35000
- 'localhost':1035
UDP:
- DNS ASK sy#####ysis.linkpc.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''