{"id":"f2c64357-b1d2-41b7-849f-34d2682c0fad","title":"Suspicious Command Patterns In Scheduled Task Creation","description":"Detects scheduled task creation using \"schtasks\" that contain potentially suspicious or uncommon commands","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-02-23","modified":"2024-03-19","tags":["attack.privilege-escalation","attack.persistence","attack.execution","attack.t1053.005"],"technique_ids":["T1053.005"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Software installers that run from temporary folders and also install scheduled tasks are expected to generate some false positives"],"references":["https://app.any.run/tasks/512c1352-6380-4436-b27d-bb62f0c020d6/","https://twitter.com/RedDrip7/status/1506480588827467785","https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/devil-bait/NCSC-MAR-Devil-Bait.pdf"],"source_path":"rules/windows/process_creation/proc_creation_win_schtasks_susp_pattern.yml","source_sha256":"8f2dea3f06ca14d8556f7efb32d0c20d1aea9b1a51e31ff36142db24ed4baa01","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_schtasks_susp_pattern.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Command Patterns In Scheduled Task Creation\nid: f2c64357-b1d2-41b7-849f-34d2682c0fad\nstatus: test\ndescription: Detects scheduled task creation using \"schtasks\" that contain potentially suspicious or uncommon commands\nreferences:\n    - https://app.any.run/tasks/512c1352-6380-4436-b27d-bb62f0c020d6/\n    - https://twitter.com/RedDrip7/status/1506480588827467785\n    - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/devil-bait/NCSC-MAR-Devil-Bait.pdf\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-02-23\nmodified: 2024-03-19\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.execution\n    - attack.t1053.005\nlogsource:\n    product: windows\n    category: process_creation\ndetection:\n    selection_schtasks:\n        Image|endswith: '\\schtasks.exe'\n        CommandLine|contains: '/Create '\n    selection_pattern_1:\n        CommandLine|contains:\n            - '/sc minute '\n            - '/ru system '\n    selection_pattern_2:\n        CommandLine|contains:\n            - 'cmd /c'\n            - 'cmd /k'\n            - 'cmd /r'\n            - 'cmd.exe /c '\n            - 'cmd.exe /k '\n            - 'cmd.exe /r '\n    selection_uncommon:\n        CommandLine|contains:\n            - ' -decode '\n            - ' -enc '\n            - ' -w hidden '\n            - ' bypass '\n            - ' IEX'\n            - '.DownloadData'\n            - '.DownloadFile'\n            - '.DownloadString'\n            - '/c start /min ' # https://twitter.com/RedDrip7/status/1506480588827467785\n            - 'FromBase64String'\n            - 'mshta http'\n            - 'mshta.exe http'\n    selection_anomaly_1:\n        CommandLine|contains:\n            - ':\\ProgramData\\'\n            - ':\\Temp\\'\n            - ':\\Tmp\\'\n            - ':\\Users\\Public\\'\n            - ':\\Windows\\Temp\\'\n            - '\\AppData\\'\n            - '%AppData%'\n            - '%Temp%'\n            - '%tmp%'\n    selection_anomaly_2:\n        CommandLine|contains:\n            - 'cscript'\n            - 'curl'\n            - 'wscript'\n    condition: selection_schtasks and ( all of selection_pattern_* or selection_uncommon or all of selection_anomaly_* )\nfalsepositives:\n    - Software installers that run from temporary folders and also install scheduled tasks are expected to generate some false positives\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1053.005","id":"T1053.005","name":"Scheduled Task","page":"techniques/enterprise/T1053.005/"}],"data_path":"data/detection-rules/f2c64357-b1d2-41b7-849f-34d2682c0fad.json","kind":"sigma"}