Backdoor.Win32.GF.j Remote Command Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/fa00524d7289cdba327d5c34ab3d9bd7.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.GF.j  
Vulnerability: Unauthenticated Remote Command Execution  
Description: The malware listens on TCP port 21554. Third-party adversaries who can reach infected hosts can run commands made available by the backdoor.  
  
Eg. commands  
setport (change port)  
RESETALL (resets to default port)  
KillHER (terminates backdoor)  
  
Family: GF  
Type: PE32  
MD5: fa00524d7289cdba327d5c34ab3d9bd7  
Vuln ID: MVID-2022-0566  
Dropped files: Windll.exe   
Disclosure: 04/26/2022  
  
  
Exploit/PoC:  
C:\>nc64.exe x.x.x.x 21554  
setport 666  
New port: 666  
KillHER  
  
  
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