{"id":"379fa130-190e-4c3f-b7bc-6c8e834485f3","title":"File Deletion Via Del","description":"Detects execution of the builtin \"del\"/\"erase\" commands in order to delete files.\nAdversaries may delete files left behind by the actions of their intrusion activity.\nMalware, tools, or other non-native files dropped or created on a system by an adversary may leave traces to indicate to what was done within a network and how.\nRemoval of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.\n","author":"frack113","status":"test","level":"low","date":"2022-01-15","modified":"2024-03-05","tags":["attack.stealth","attack.t1070.004"],"technique_ids":["T1070.004"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["False positives levels will differ Depending on the environment. You can use a combination of ParentImage and other keywords from the CommandLine field to filter legitimate activity"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.004/T1070.004.md","https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/erase"],"source_path":"rules/windows/process_creation/proc_creation_win_cmd_del_execution.yml","source_sha256":"b3d22aa6b6d19865f292bdc1d15a94010bc0ff5aca481de419abc1f5e1fd3798","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_cmd_del_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: File Deletion Via Del\nid: 379fa130-190e-4c3f-b7bc-6c8e834485f3\nstatus: test\ndescription: |\n    Detects execution of the builtin \"del\"/\"erase\" commands in order to delete files.\n    Adversaries may delete files left behind by the actions of their intrusion activity.\n    Malware, tools, or other non-native files dropped or created on a system by an adversary may leave traces to indicate to what was done within a network and how.\n    Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.004/T1070.004.md\n    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/erase\nauthor: frack113\ndate: 2022-01-15\nmodified: 2024-03-05\ntags:\n    - attack.stealth\n    - attack.t1070.004\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith: '\\cmd.exe'\n        - OriginalFileName: 'Cmd.Exe'\n    selection_del:\n        CommandLine|contains:\n            - 'del '\n            - 'erase '\n    selection_flags:\n        CommandLine|contains|windash:\n            - ' -f' # Force deleting of read-only files.\n            - ' -s' # Delete specified files from all subdirectories.\n            - ' -q' # Quiet mode, do not ask if ok to delete on global wildcard\n    condition: all of selection_*\nfalsepositives:\n    - False positives levels will differ Depending on the environment. You can use a combination of ParentImage and other keywords from the CommandLine field to filter legitimate activity\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1070.004","id":"T1070.004","name":"File Deletion","page":"techniques/enterprise/T1070.004/"}],"data_path":"data/detection-rules/379fa130-190e-4c3f-b7bc-6c8e834485f3.json","kind":"sigma"}