Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Corp' = '%TEMP%\winlogon.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Corp' = '%TEMP%\winlogon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\Updates\Drivers\System.exe
- <Drive name for removable media>:\Updates\Drivers\Desktop.ini
Malicious functions:
Creates and executes the following:
- '%TEMP%\winlogon.exe'
Modifies file system :
Creates the following files:
- %TEMP%\winlogon.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Updates\Drivers\System.exe
- %TEMP%\winlogon.exe
Network activity:
Connects to:
- 'pr####.#nlimited-network.ro':6696
UDP:
- DNS ASK pr####.#nlimited-network.ro
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: '(null)' WindowName: 'BitDefender Firewall Alert'
- ClassName: '(null)' WindowName: 'Windows Security Alert'
