Non-privileged Usage of Reg or Powershell

Hunt Hypothesis

Search for usage of reg or Powershell by non-privileged users to modify service configuration in registry

Detection Rule

Sigma (Original)

title: Non-privileged Usage of Reg or Powershell
id: 8f02c935-effe-45b3-8fc9-ef8696a9e41d
status: test
description: Search for usage of reg or Powershell by non-privileged users to modify service configuration in registry
references:
    - https://image.slidesharecdn.com/kheirkhabarovoffzonefinal-181117201458/95/hunting-for-privilege-escalation-in-windows-environment-20-638.jpg
author: Teymur Kheirkhabarov (idea), Ryan Plas (rule), oscd.community
date: 2020-10-05
modified: 2024-12-01
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: process_creation
    product: windows
detection:
    selection_cli:
        - CommandLine|contains|all:
              - 'reg '
              - 'add'
        - CommandLine|contains:
              - 'powershell'
              - 'set-itemproperty'
              - ' sp '
              - 'new-itemproperty'
    selection_data:
        IntegrityLevel:
            - 'Medium'
            - 'S-1-16-8192'
        CommandLine|contains|all:
            - 'ControlSet'
            - 'Services'
        CommandLine|contains:
            - 'ImagePath'
            - 'FailureCommand'
            - 'ServiceDLL'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

KQL (Azure Sentinel)

imProcessCreate
| where ((TargetProcessCommandLine contains "reg " and TargetProcessCommandLine contains "add") or (TargetProcessCommandLine contains "powershell" or TargetProcessCommandLine contains "set-itemproperty" or TargetProcessCommandLine contains " sp " or TargetProcessCommandLine contains "new-itemproperty")) and ((TargetProcessIntegrityLevel in~ ("Medium", "S-1-16-8192")) and (TargetProcessCommandLine contains "ControlSet" and TargetProcessCommandLine contains "Services") and (TargetProcessCommandLine contains "ImagePath" or TargetProcessCommandLine contains "FailureCommand" or TargetProcessCommandLine contains "ServiceDLL"))

Required Data Sources

False Positive Guidance

• Unknown

MITRE ATT&CK Context

• Tactic: Persistence
• Technique: T1112 — T1112

References

• https://image.slidesharecdn.com/kheirkhabarovoffzonefinal-181117201458/95/hunting-for-privilege-escalation-in-windows-environment-20-638.jpg
• SigmaHQ Rule