{"id":"9f4662ac-17ca-43aa-8f12-5d7b989d0101","title":"Tamper With Sophos AV Registry Keys","description":"Detects tamper attempts to sophos av functionality via registry key modification","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-09-02","modified":"2023-08-17","tags":["attack.defense-impairment","attack.t1685"],"technique_ids":["T1685"],"logsource":{"category":"registry_set","product":"windows"},"falsepositives":["Some FP may occur when the feature is disabled by the AV itself, you should always investigate if the action was legitimate"],"references":["https://redacted.com/blog/bianlian-ransomware-gang-gives-it-a-go/"],"source_path":"rules/windows/registry/registry_set/registry_set_sophos_av_tamper.yml","source_sha256":"ec2647c58a64d09088e816fdf631ba27ee00734c29e4f8ebf24acc283802305b","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_set/registry_set_sophos_av_tamper.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Tamper With Sophos AV Registry Keys\nid: 9f4662ac-17ca-43aa-8f12-5d7b989d0101\nstatus: test\ndescription: Detects tamper attempts to sophos av functionality via registry key modification\nreferences:\n    - https://redacted.com/blog/bianlian-ransomware-gang-gives-it-a-go/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-09-02\nmodified: 2023-08-17\ntags:\n    - attack.defense-impairment\n    - attack.t1685\nlogsource:\n    category: registry_set\n    product: windows\ndetection:\n    selection:\n        TargetObject|contains:\n            - '\\Sophos Endpoint Defense\\TamperProtection\\Config\\SAVEnabled'\n            - '\\Sophos Endpoint Defense\\TamperProtection\\Config\\SEDEnabled'\n            - '\\Sophos\\SAVService\\TamperProtection\\Enabled'\n        Details: DWORD (0x00000000)\n    condition: selection\nfalsepositives:\n    - Some FP may occur when the feature is disabled by the AV itself, you should always investigate if the action was legitimate\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1685","id":"T1685","name":"Disable or Modify Tools","page":"techniques/enterprise/T1685/"}],"data_path":"data/detection-rules/9f4662ac-17ca-43aa-8f12-5d7b989d0101.json","kind":"sigma"}