Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '97335ed968c8d21501810d2516770677' = '"%APPDATA%\csrss.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '97335ed968c8d21501810d2516770677' = '"%APPDATA%\csrss.exe" ..'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\csrss.exe' = '%APPDATA%\csrss.exe:*:Enabled:csrss.exe'
Creates and executes the following:
- '%APPDATA%\csrss.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\csrss.exe" "csrss.exe" ENABLE
Modifies file system :
Creates the following files:
- %APPDATA%\csrss.exe
Network activity:
Connects to:
- 'ne###.zapto.org':1604
UDP:
- DNS ASK ne###.zapto.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
