{"id":"4beb6ae0-f85b-41e2-8f18-8668abc8af78","title":"Sysinternals PsSuspend Suspicious Execution","description":"Detects suspicious execution of Sysinternals PsSuspend, where the utility is used to suspend critical processes such as AV or EDR to bypass defenses","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2023-03-23","modified":"","tags":["attack.defense-impairment","attack.t1685"],"technique_ids":["T1685"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unlikely"],"references":["https://learn.microsoft.com/en-us/sysinternals/downloads/pssuspend","https://twitter.com/0gtweet/status/1638069413717975046"],"source_path":"rules/windows/process_creation/proc_creation_win_sysinternals_pssuspend_susp_execution.yml","source_sha256":"9e738e2ad6d323dff0909796d6180eba6f005094c26b8050cb851c584416fe9e","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_sysinternals_pssuspend_susp_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Sysinternals PsSuspend Suspicious Execution\nid: 4beb6ae0-f85b-41e2-8f18-8668abc8af78\nrelated:\n    - id: 48bbc537-b652-4b4e-bd1d-281172df448f # Basic Execution\n      type: similar\nstatus: test\ndescription: Detects suspicious execution of Sysinternals PsSuspend, where the utility is used to suspend critical processes such as AV or EDR to bypass defenses\nreferences:\n    - https://learn.microsoft.com/en-us/sysinternals/downloads/pssuspend\n    - https://twitter.com/0gtweet/status/1638069413717975046\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-03-23\ntags:\n    - attack.defense-impairment\n    - attack.t1685\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - OriginalFileName: 'pssuspend.exe'\n        - Image|endswith:\n              - '\\pssuspend.exe'\n              - '\\pssuspend64.exe'\n    selection_cli:\n        # Add more interesting/critical processes\n        CommandLine|contains: 'msmpeng.exe'\n    condition: all of selection_*\nfalsepositives:\n    - Unlikely\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1685","id":"T1685","name":"Disable or Modify Tools","page":"techniques/enterprise/T1685/"}],"data_path":"data/detection-rules/4beb6ae0-f85b-41e2-8f18-8668abc8af78.json","kind":"sigma"}