sigmamediumHunting

Direct Autorun Keys Modification

Detects direct modification of autostart extensibility point (ASEP) in registry using reg.exe.

MITRE ATT&CK

privilege-escalationpersistence

Detection Query

selection_img:
  - Image|endswith: \reg.exe
  - OriginalFileName: reg.exe
selection_cli_add:
  CommandLine|contains: add
selection_cli_keys:
  CommandLine|contains:
    - \software\Microsoft\Windows\CurrentVersion\Run
    - \software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run
    - \software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
    - \software\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit
    - \software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell
    - \software\Microsoft\Windows NT\CurrentVersion\Windows
    - \system\CurrentControlSet\Control\SafeBoot\AlternateShell
condition: all of selection_*

Author

Victor Sergeev, Daniil Yugoslavskiy, oscd.community, Swachchhanda Shrawan Poudel (Nextron Systems)

Created

2019-10-25

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.privilege-escalationattack.persistenceattack.t1547.001

Raw Content

title: Direct Autorun Keys Modification
id: 24357373-078f-44ed-9ac4-6d334a668a11
status: test
description: Detects direct modification of autostart extensibility point (ASEP) in registry using reg.exe.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.001/T1547.001.md
    - https://github.com/HackTricks-wiki/hacktricks/blob/e4c7b21b8f36c97c35b7c622732b38a189ce18f7/src/windows-hardening/windows-local-privilege-escalation/privilege-escalation-with-autorun-binaries.md
author: Victor Sergeev, Daniil Yugoslavskiy, oscd.community, Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2019-10-25
modified: 2026-01-05
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\reg.exe'
        - OriginalFileName: 'reg.exe'
    selection_cli_add:
        CommandLine|contains: 'add'     # to avoid intersection with discovery tactic rules
    selection_cli_keys:
        CommandLine|contains:           # need to improve this list, there are plenty of ASEP reg keys
            - '\software\Microsoft\Windows\CurrentVersion\Run' # Also covers the strings "RunOnce", "RunOnceEx", "RunServices", "RunServicesOnce"
            - '\software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run'
            - '\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run'
            - '\software\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit'
            - '\software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell'
            - '\software\Microsoft\Windows NT\CurrentVersion\Windows'
            - '\system\CurrentControlSet\Control\SafeBoot\AlternateShell'
    condition: all of selection_*
falsepositives:
    - Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reasons.
    - Legitimate administrator sets up autorun keys for legitimate reasons.
    - Discord
level: medium