full-disclosure - [FD] Trojan.Win32.DarkGateLoader (multi variants) / Arbitrary Code Execution

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Message-ID: <CAAHK0WSGWXwJNd8SJxvEjkrDp9rPY=-hDfykbtbb9SnQeonGHQ@mail.gmail.com>
Date: Wed, 5 Jun 2024 20:57:20 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Trojan.Win32.DarkGateLoader (multi variants) / Arbitrary Code
	Execution

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024
Original source:
https://malvuln.com/advisory/afe012ed0d96abfe869b9e26ea375824.txt
Contact: malvuln13@...il.com
Media: x.com/malvuln

Threat: Trojan.Win32.DarkGateLoader (multi variants)
Vulnerability: Arbitrary Code Execution
Description: Multiple variants of this malware look for and execute
x32-bit "urlmon.dll" PE file in its current directory. Therefore, we
can hijack that DLL and execute our own code to intercept and
terminate the malware. Once loaded the exploit dll will check if the
current directory is "C:\Windows\System32", if not we grab our process
ID and terminate. Leverage RansomLord v3.1 for DLL generation, while
written as a proof-of-concept to specifically defeat ransomware, it
can also be used to generate DLLs to try an exploit other types of
malwares. All basic tests were conducted successfully in a virtual
machine environment.

Family: DarkGateLoader
Type: PE32
MD5: afe012ed0d96abfe869b9e26ea375824
SHA256: 18d87c514ff25f817eac613c5f2ad39b21b6e04b6da6dbe8291f04549da2c290

Other vulnerable samples:
cad102af0d2709fd57f62d9cce9ba174
ca2ef9d3146341428657295892894170
3c609ac6b2de29578a2383d71e12caa9

Vuln ID: MVID-2024-0685
Disclosure: 06/05/2024

Exploit/PoC:
1) Download RansomLord v3.1
    https://github.com/malvuln/RansomLord
2) Locate the x32 urlmon.dll entry using the -m flag (DLL Map)
3) Use -g flag (Generate Exploit) to output an x32 DLL urlmon.dll,
based on an existing vulnerable malware in the victims list.
4) (Optional) -e flag to setup Windows event IOC logging in the
registry, this will attempt to log the SHA256 hash, full path and
filename.

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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