A remote administration utility that bypasses normal security mechanisms to secretly control a program, computer or network.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
The malware creates a dummy winlogon.exe process where it runs its malicious threads and drops the following copy:
It also creates a legitimate winlogon.exe to %windir%\system32\install\Windows.exe.
The malware creates the following registry launch point:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run %path_of_executed_file% = %appdata%\Winlogon\winlogon.exe
The following registry entries would also be created:
- HKEY_CURRENT_USER\Software\chuck norris FirstExecution = %date_time% NewIdentification = "chuck norris" NewGroup = 2
The malware is a reverse connection remote administration tool. It connects to chucknorris.zapto.org at port 150 to get its command.