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List:       full-disclosure
Subject:    [FD] Backdoor.Win32.Noknok.60 / Insecure Permissions
From:       malvuln <malvuln13 () gmail ! com>
Date:       2021-01-23 6:07:05
Message-ID: CAAHK0WRGMZ7wQUXU686wmRBUyF15X+Xa5oNG=yHwrHgOZkNw8g () mail ! gmail ! com
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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/ecaf6a123fdf1f5660692dfc4c67a933.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Noknok.60
Vulnerability: Insecure Permissions
Description: When generating an executable you can specify a directory
to write the file, the malware then grants change (C) permissions to
authenticated users group.
Type: PE32
MD5: ecaf6a123fdf1f5660692dfc4c67a933
Vuln ID: MVID-2021-0049
Disclosure: 01/23/2021

Exploit/PoC:
C:\>cacls c:\temp
c:\temp 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


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