sigmahighHunting

Sysinternals PsSuspend Suspicious Execution

Detects suspicious execution of Sysinternals PsSuspend, where the utility is used to suspend critical processes such as AV or EDR to bypass defenses

MITRE ATT&CK

T1562.001

defense-evasion

Detection Query

selection_img:
  - OriginalFileName: pssuspend.exe
  - Image|endswith:
      - \pssuspend.exe
      - \pssuspend64.exe
selection_cli:
  CommandLine|contains: msmpeng.exe
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-03-23

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.001

Raw Content

title: Sysinternals PsSuspend Suspicious Execution
id: 4beb6ae0-f85b-41e2-8f18-8668abc8af78
related:
    - id: 48bbc537-b652-4b4e-bd1d-281172df448f # Basic Execution
      type: similar
status: test
description: Detects suspicious execution of Sysinternals PsSuspend, where the utility is used to suspend critical processes such as AV or EDR to bypass defenses
references:
    - https://learn.microsoft.com/en-us/sysinternals/downloads/pssuspend
    - https://twitter.com/0gtweet/status/1638069413717975046
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-23
tags:
    - attack.defense-evasion
    - attack.t1562.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - OriginalFileName: 'pssuspend.exe'
        - Image|endswith:
              - '\pssuspend.exe'
              - '\pssuspend64.exe'
    selection_cli:
        # Add more interesting/critical processes
        CommandLine|contains: 'msmpeng.exe'
    condition: all of selection_*
falsepositives:
    - Unlikely
level: high