Monday, February 22, 2021

Backdoor.Win32.Inject.tyq Insecure Permissions

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/833868d3092bea833839a6b8ec196046.txt
Contact: [email protected]
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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