Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ef6805c25b5a2f877bc96e021971597e' = '"%TEMP%\lsass.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ef6805c25b5a2f877bc96e021971597e' = '"%TEMP%\lsass.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\ef6805c25b5a2f877bc96e021971597e.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\lsass.exe' = '%TEMP%\lsass.exe:*:Enabled:lsass.exe'
Creates and executes the following:
- '%TEMP%\lsass.exe'
- '%HOMEPATH%\Local Settings\TempKeygen.exe'
- '%HOMEPATH%\Local Settings\TempServer1.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\lsass.exe" "lsass.exe" ENABLE
Modifies file system :
Creates the following files:
- %TEMP%\lsass.exe
- %HOMEPATH%\Local Settings\TempKeygen.exe
- %HOMEPATH%\Local Settings\TempServer1.exe
Network activity:
Connects to:
- 'xm####xsx.zapto.org':1177
UDP:
- DNS ASK xm####xsx.zapto.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
