Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'WinUpdateManager' = '%APPDATA%\Microsoft\Windows\Updates\winupdate.exe'
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\windowsservice.exe
Malicious functions
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v4.0.30319\cvtres.exe
Modifies file system
Creates the following files
- %TEMP%\cryptor_debug.log
- %APPDATA%\microsoft\windows\updates\winupdate.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\microsoft\windows\updates\winupdate.exe
Miscellaneous
Executes the following
- '%WINDIR%\microsoft.net\framework\v4.0.30319\cvtres.exe'
