Backdoor.Win32.Azbreg.aant / Insecure Permissions

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/dcc1855744f2d740745f096e4f031143.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Azbreg.aant
Vulnerability: Insecure Permissions
Description: Azbreg.aant backdoor creates an insecure dir named
"RECYCLER" under c:\ drive, granting change (C) permissions to the
authenticated user group.
Type: PE32
MD5: dcc1855744f2d740745f096e4f031143
Vuln ID: MVID-2021-0089
Dropped files:
Disclosure: 02/15/2021


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