Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Webhost' = '%HOMEPATH%\AppData\Roaming\Windows\<File name>.exe'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\Webhost.url
Malicious functions:
Injects code into
the following user processes:
- winhost.exe
Modifies file system:
Creates the following files:
- %TEMP%\winhost.exe
Moves the following files:
- from <Full path to file> to %HOMEPATH%\AppData\Roaming\Windows\<File name>.exe
Miscellaneous:
Creates and executes the following:
- '<Full path to file>'
- '%TEMP%\winhost.exe'
Executes the following:
- '<SYSTEM32>\schtasks.exe' /create /tn \System\SecurityServiceUpdate /tr %HOMEPATH%\AppData\Roaming\Windows\<File name>.exe /st 00:00 /du 9999:59 /sc daily /ri 5 /f
- '<SYSTEM32>\cmd.exe' /C schtasks /create /tn \System\SecurityServiceUpdate /tr %userprofile%\AppData\Roaming\Windows\<File name>.exe /st 00:00 /du 9999:59 /sc daily /ri 5 /f
