Permission Check Via Accesschk.EXE

testmedium
Log-Quelle: windows · process_creationAutor Teymur Kheirkhabarov (idea), Mangatas Tondang, oscd.community, Nasreddine Bencherchali (Nextron Systems)Datum 2020-10-13
01

Beschreibung

Was dies ist, in Kürze.

Detects the usage of the "Accesschk" utility, an access and privilege audit tool developed by SysInternal and often being abused by attacker to verify process privileges

02

Tags

attack.discoveryattack.t1069.001
03

Regelquelle (YAML)

title: Permission Check Via Accesschk.EXE
id: c625d754-6a3d-4f65-9c9a-536aea960d37
status: test
description: Detects the usage of the "Accesschk" utility, an access and privilege audit tool developed by SysInternal and often being abused by attacker to verify process privileges
references:
    - https://speakerdeck.com/heirhabarov/hunting-for-privilege-escalation-in-windows-environment?slide=43
    - https://www.youtube.com/watch?v=JGs-aKf2OtU&ab_channel=OFFZONEMOSCOW
    - https://github.com/carlospolop/PEASS-ng/blob/fa0f2e17fbc1d86f1fd66338a40e665e7182501d/winPEAS/winPEASbat/winPEAS.bat
    - https://github.com/gladiatx0r/Powerless/blob/04f553bbc0c65baf4e57344deff84e3f016e6b51/Powerless.bat
author: Teymur Kheirkhabarov (idea), Mangatas Tondang, oscd.community, Nasreddine Bencherchali (Nextron Systems)
date: 2020-10-13
modified: 2026-06-29
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Product|endswith: 'AccessChk'
        - Description|contains: 'Reports effective permissions'
        - Image|endswith:
              - '\accesschk.exe'
              - '\accesschk64.exe'
              - '\accesschk64a.exe'
        - OriginalFileName: 'accesschk.exe'
    selection_cli:
        CommandLine|contains: # These are the most common flags used with this tool. You could add other combinations if needed
            - 'uwcqv '
            - 'kwsu '
            - 'qwsu '
            - 'uwdqs '
    condition: all of selection*
falsepositives:
    - System administrator Usage
level: medium
04

erkennt Techniken (1)

ATT&CK-Techniken, die dies ermöglicht oder abbildet.

05

Referenzen

Externe Belege — Patches, Meldungen, Analysen.