{"id":"24c8392b-aa3c-46b7-a545-43f71657fe98","title":"Suspicious Schtasks Schedule Types","description":"Detects scheduled task creations or modification on a suspicious schedule type","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-09-09","modified":"","tags":["attack.privilege-escalation","attack.persistence","attack.execution","attack.t1053.005"],"technique_ids":["T1053.005"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Legitimate processes that run at logon. Filter according to your environment"],"references":["https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-change","https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create","http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html"],"source_path":"rules/windows/process_creation/proc_creation_win_schtasks_schedule_type.yml","source_sha256":"6355c03228916d530139e47e19432330ad8db1df03fabf37871f240cf37da228","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_schtasks_schedule_type.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 Schtasks Schedule Types\nid: 24c8392b-aa3c-46b7-a545-43f71657fe98\nrelated:\n    - id: 7a02e22e-b885-4404-b38b-1ddc7e65258a\n      type: similar\nstatus: test\ndescription: Detects scheduled task creations or modification on a suspicious schedule type\nreferences:\n    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-change\n    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create\n    - http://blog.talosintelligence.com/2022/09/lazarus-three-rats.html\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-09-09\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_img:\n        - Image|endswith: '\\schtasks.exe'\n        - OriginalFileName: 'schtasks.exe'\n    selection_time:\n        CommandLine|contains:\n            - ' ONLOGON '\n            - ' ONSTART '\n            - ' ONCE '\n            - ' ONIDLE '\n    filter_privs:\n        CommandLine|contains:\n            - 'NT AUT' # This covers the usual NT AUTHORITY\\SYSTEM\n            - ' SYSTEM' # SYSTEM is a valid value for schtasks hence it gets it's own value with space\n            - 'HIGHEST'\n    condition: all of selection_* and not 1 of filter_*\nfalsepositives:\n    - Legitimate processes that run at logon. Filter according to your environment\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/24c8392b-aa3c-46b7-a545-43f71657fe98.json","kind":"sigma"}