Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winupdates' = '%APPDATA%\Winupdater\winupdate.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\lsass.exe"'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\lsass.exe' = '%APPDATA%\lsass.exe:*:Enabled:CityScape'
Creates and executes the following:
- %APPDATA%\lsass.exe
- %APPDATA%\Winupdater\winupdate.exe
Executes the following:
- <SYSTEM32>\netsh.exe firewall add allowedprogram "%APPDATA%\lsass.exe" CityScape Enable
- <SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "winupdates" /t REG_SZ /d "%APPDATA%\Winupdater\winupdate.exe" /f
- <SYSTEM32>\cmd.exe /c """%TEMP%\qhJZg.bat"" "
Modifies file system :
Creates the following files:
- %APPDATA%\lsass.exe
- %APPDATA%\Winupdater\winupdate.exe
- %TEMP%\qhJZg.bat
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\SYSTEM.EXE
- <Drive name for removable media>:\Autorun.inf
- %APPDATA%\Winupdater\winupdate.exe
- %APPDATA%\lsass.exe
Deletes the following files:
- %TEMP%\qhJZg.bat
Network activity:
Connects to:
- 'no###.no-ip.info':3175
UDP:
- DNS ASK no###.no-ip.info
Miscellaneous:
Searches for the following windows:
- ClassName: '' WindowName: 'HB'
- ClassName: 'Indicator' WindowName: ''