{"id":"33339be3-148b-4e16-af56-ad16ec6c7e7b","title":"Findstr Launching .lnk File","description":"Detects usage of findstr to identify and execute a lnk file as seen within the HHS redirect attack","author":"Trent Liffick","status":"test","level":"medium","date":"2020-05-01","modified":"2024-01-15","tags":["attack.stealth","attack.t1036","attack.t1202","attack.t1027.003"],"technique_ids":["T1027.003","T1036","T1202"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.bleepingcomputer.com/news/security/hhsgov-open-redirect-used-by-coronavirus-phishing-to-spread-malware/"],"source_path":"rules/windows/process_creation/proc_creation_win_findstr_lnk.yml","source_sha256":"5dd388c20396247c9b604dea1ab6a9a31b272d6415964d2a63ddd369d96754f9","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_findstr_lnk.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Findstr Launching .lnk File\nid: 33339be3-148b-4e16-af56-ad16ec6c7e7b\nstatus: test\ndescription: Detects usage of findstr to identify and execute a lnk file as seen within the HHS redirect attack\nreferences:\n    - https://www.bleepingcomputer.com/news/security/hhsgov-open-redirect-used-by-coronavirus-phishing-to-spread-malware/\nauthor: Trent Liffick\ndate: 2020-05-01\nmodified: 2024-01-15\ntags:\n    - attack.stealth\n    - attack.t1036\n    - attack.t1202\n    - attack.t1027.003\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\find.exe'\n              - '\\findstr.exe'\n        - OriginalFileName:\n              - 'FIND.EXE'\n              - 'FINDSTR.EXE'\n    selection_cli:\n        CommandLine|endswith:\n            - '.lnk'\n            - '.lnk\"'\n            - \".lnk'\"\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1027.003","id":"T1027.003","name":"Steganography","page":"techniques/enterprise/T1027.003/"},{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"},{"key":"enterprise/T1202","id":"T1202","name":"Indirect Command Execution","page":"techniques/enterprise/T1202/"}],"data_path":"data/detection-rules/33339be3-148b-4e16-af56-ad16ec6c7e7b.json","kind":"sigma"}