full-disclosure - [FD] Email-Worm.Win32.Sircam.eb / Insecure Permissions EoP

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Message-ID: <CAAHK0WT+cnJU_B8VR0VeEcJE94ZxNvB1nooyTDfUMV5V_d1dbA@mail.gmail.com>
Date: Sun, 7 Feb 2021 00:18:56 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Email-Worm.Win32.Sircam.eb / Insecure Permissions EoP

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/cd88a9b686acd9ccf23dba8d248129b4.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Email-Worm.Win32.Sircam.eb
Vulnerability: Insecure Permissions EoP
Description: Sircam.eb creates a vuln dir under c:\ drive named
"Windupdt" and drops an exe named "winupdate.exe". Grants change (C)
permissions to authenticated users group.
Type: PE32
MD5: cd88a9b686acd9ccf23dba8d248129b4
Vuln ID: MVID-2021-0070
Dropped files: winupdate.exe
Disclosure: 02/06/2021

Exploit/PoC:
C:\>cacls \Windupdt
C:\Windupdt BUILTIN\Administrators:(OI)(CI)(ID)F
            NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F
            BUILTIN\Users:(OI)(CI)(ID)R
            NT AUTHORITY\Authenticated Users:(ID)C
            NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

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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