{"id":"f0ca6c24-3225-47d5-b1f5-352bf07ecfa7","title":"PUA - DefenderCheck Execution","description":"Detects the use of DefenderCheck, a tool to evaluate the signatures used in Microsoft Defender. It can be used to figure out the strings / byte chains used in Microsoft Defender to detect a tool and thus used for AV evasion.","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-08-30","modified":"2023-02-04","tags":["attack.stealth","attack.t1027.005"],"technique_ids":["T1027.005"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unlikely"],"references":["https://github.com/matterpreter/DefenderCheck"],"source_path":"rules/windows/process_creation/proc_creation_win_pua_defendercheck.yml","source_sha256":"b6e5b970a105059b2a56e6d992433b7777044a8fa143ea642bf7b0e6b74b65dc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_pua_defendercheck.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: PUA - DefenderCheck Execution\nid: f0ca6c24-3225-47d5-b1f5-352bf07ecfa7\nstatus: test\ndescription: Detects the use of DefenderCheck, a tool to evaluate the signatures used in Microsoft Defender. It can be used to figure out the strings / byte chains used in Microsoft Defender to detect a tool and thus used for AV evasion.\nreferences:\n    - https://github.com/matterpreter/DefenderCheck\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-08-30\nmodified: 2023-02-04\ntags:\n    - attack.stealth\n    - attack.t1027.005\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        - Image|endswith: '\\DefenderCheck.exe'\n        - Description: 'DefenderCheck'\n    condition: selection\nfalsepositives:\n    - Unlikely\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1027.005","id":"T1027.005","name":"Indicator Removal from Tools","page":"techniques/enterprise/T1027.005/"}],"data_path":"data/detection-rules/f0ca6c24-3225-47d5-b1f5-352bf07ecfa7.json","kind":"sigma"}