full-disclosure - [FD] Backdoor.Win32.LolBot.gen / Insecure Permissions

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Message-ID: <CAAHK0WRMsWHgDqg3c4RCw1Y41wkiVt-BNeL1JCr9RYqOfrV_=g@mail.gmail.com>
Date: Tue, 5 Oct 2021 19:56:19 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.LolBot.gen / Insecure Permissions

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/56a93a2a0a4c6a09e2761f2e0351b020.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.LolBot.gen
Vulnerability: Insecure Permissions
Description: The malware creates an executable with insecure
permissions under c:\ drive granting change (C) permissions to the
authenticated user group. Standard users can rename the executable
dropped by the malware to disable it or replace it with their own
executable. Then wait for a privileged user to logon to the infected
machine to potentially escalate privileges.
Type: PE32
MD5: 56a93a2a0a4c6a09e2761f2e0351b020
Vuln ID: MVID-2021-0353
Dropped files: "New Folder .exe"
Disclosure: 10/04/2021

Exploit/PoC:
C:\>cacls "New Folder .exe"
C:\New Folder .exe BUILTIN\Administrators:(ID)F
                   NT AUTHORITY\SYSTEM:(ID)F
                   BUILTIN\Users:(ID)R
                   NT AUTHORITY\Authenticated Users:(ID)C

Disclaimer: The information contained within this advisory is supplied
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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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