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List:       full-disclosure
Subject:    [FD] Backdoor.Win32.Inject.tyq / Insecure Permissions
From:       malvuln <malvuln13 () gmail ! com>
Date:       2021-02-20 4:21:01
Message-ID: CAAHK0WQpbhc9eeazCiMoMX=ccUxYS5jw3e2A9UcKnQF+PP3dVw () mail ! gmail ! com
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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/833868d3092bea833839a6b8ec196046.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Inject.tyq
Vulnerability: Insecure Permissions
Description: The backdoor creates an dir named "hotfix" under c:\ drive
granting change (C) permissions to the authenticated user group.
Type: PE32
MD5: 833868d3092bea833839a6b8ec196046
Vuln ID: MVID-2021-0100
Dropped files:
Disclosure: 02/19/2021

Exploit/PoC:
C:\>cacls hotfix
C:\hotfix 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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