{"id":"bacf58c6-e199-4040-a94f-95dea0f1e45a","title":"Windows Filtering Platform Blocked Connection From EDR Agent Binary","description":"Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents.\nAdversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events.\n","author":"@gott_cyber","status":"test","level":"high","date":"2024-01-08","modified":"","tags":["attack.defense-impairment","attack.t1685"],"technique_ids":["T1685"],"logsource":{"product":"windows","service":"security","definition":"Requirements: Audit Filtering Platform Connection needs to be enabled"},"falsepositives":["Unlikely"],"references":["https://github.com/netero1010/EDRSilencer","https://github.com/amjcyber/EDRNoiseMaker","https://ghoulsec.medium.com/misc-series-4-forensics-on-edrsilencer-events-428b20b3f983"],"source_path":"rules/windows/builtin/security/object_access/win_security_wfp_endpoint_agent_blocked.yml","source_sha256":"387412af385f5ff488458a5365656cf6f4fe0a246647a4b7487c9cfdadd76270","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/object_access/win_security_wfp_endpoint_agent_blocked.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Windows Filtering Platform Blocked Connection From EDR Agent Binary\nid: bacf58c6-e199-4040-a94f-95dea0f1e45a\nstatus: test\ndescription: |\n    Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents.\n    Adversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events.\nreferences:\n    - https://github.com/netero1010/EDRSilencer\n    - https://github.com/amjcyber/EDRNoiseMaker\n    - https://ghoulsec.medium.com/misc-series-4-forensics-on-edrsilencer-events-428b20b3f983\nauthor: '@gott_cyber'\ndate: 2024-01-08\ntags:\n    - attack.defense-impairment\n    - attack.t1685\nlogsource:\n    product: windows\n    service: security\n    definition: 'Requirements: Audit Filtering Platform Connection needs to be enabled'\ndetection:\n    selection:\n        EventID: 5157\n        Application|endswith:\n            - '\\AmSvc.exe' # Cybereason\n            - '\\cb.exe' # Carbon Black EDR\n            - '\\CETASvc.exe' # TrendMicro Apex One\n            - '\\CNTAoSMgr.exe' # TrendMicro Apex One\n            - '\\CrAmTray.exe' # Cybereason\n            - '\\CrsSvc.exe' # Cybereason\n            - '\\CSFalconContainer.exe' # CrowdStrike Falcon\n            - '\\CSFalconService.exe' # CrowdStrike Falcon\n            - '\\CybereasonAV.exe' # Cybereason\n            - '\\CylanceSvc.exe' # Cylance\n            - '\\cyserver.exe' # Palo Alto Networks Traps/Cortex XDR\n            - '\\CyveraService.exe' # Palo Alto Networks Traps/Cortex XDR\n            - '\\CyvrFsFlt.exe' # Palo Alto Networks Traps/Cortex XDR\n            - '\\EIConnector.exe' # ESET Inspect\n            - '\\elastic-agent.exe' # Elastic EDR\n            - '\\elastic-endpoint.exe' # Elastic EDR\n            - '\\EndpointBasecamp.exe' # TrendMicro Apex One\n            - '\\ExecutionPreventionSvc.exe' # Cybereason\n            - '\\filebeat.exe' # Elastic EDR\n            - '\\fortiedr.exe' # FortiEDR\n            - '\\hmpalert.exe' # Sophos EDR\n            - '\\hurukai.exe' # Harfanglab EDR\n            - '\\LogProcessorService.exe' # SentinelOne\n            - '\\mcsagent.exe' # Sophos EDR\n            - '\\mcsclient.exe' # Sophos EDR\n            - '\\MsMpEng.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\MsSense.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\Ntrtscan.exe' # TrendMicro Apex One\n            - '\\PccNTMon.exe' # TrendMicro Apex One\n            - '\\QualysAgent.exe' # Qualys EDR\n            - '\\RepMgr.exe' # Carbon Black Cloud\n            - '\\RepUtils.exe' # Carbon Black Cloud\n            - '\\RepUx.exe' # Carbon Black Cloud\n            - '\\RepWAV.exe' # Carbon Black Cloud\n            - '\\RepWSC.exe' # Carbon Black Cloud\n            - '\\sedservice.exe' # Sophos EDR\n            - '\\SenseCncProxy.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\SenseIR.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\SenseNdr.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\SenseSampleUploader.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus\n            - '\\SentinelAgent.exe' # SentinelOne\n            - '\\SentinelAgentWorker.exe' # SentinelOne\n            - '\\SentinelBrowserNativeHost.exe' # SentinelOne\n            - '\\SentinelHelperService.exe' # SentinelOne\n            - '\\SentinelServiceHost.exe' # SentinelOne\n            - '\\SentinelStaticEngine.exe' # SentinelOne\n            - '\\SentinelStaticEngineScanner.exe' # SentinelOne\n            - '\\sfc.exe' # Cisco Secure Endpoint (Formerly Cisco AMP)\n            - '\\sophos ui.exe' # Sophos EDR\n            - '\\sophosfilescanner.exe' # Sophos EDR\n            - '\\sophosfs.exe' # Sophos EDR\n            - '\\sophoshealth.exe' # Sophos EDR\n            - '\\sophosips.exe' # Sophos EDR\n            - '\\sophosLivequeryservice.exe' # Sophos EDR\n            - '\\sophosnetfilter.exe' # Sophos EDR\n            - '\\sophosntpservice.exe' # Sophos EDR\n            - '\\sophososquery.exe' # Sophos EDR\n            - '\\sspservice.exe' # Sophos EDR\n            - '\\TaniumClient.exe' # Tanium\n            - '\\TaniumCX.exe' # Tanium\n            - '\\TaniumDetectEngine.exe' # Tanium\n            - '\\TMBMSRV.exe' # TrendMicro Apex One\n            - '\\TmCCSF.exe' # TrendMicro Apex One\n            - '\\TmListen.exe' # TrendMicro Apex One\n            - '\\TmWSCSvc.exe' # TrendMicro Apex One\n            - '\\Traps.exe' # Palo Alto Networks Traps/Cortex XDR\n            - '\\winlogbeat.exe' # Elastic EDR\n            - '\\WSCommunicator.exe' # TrendMicro Apex One\n            - '\\xagt.exe' # Trellix EDR\n    condition: selection\nfalsepositives:\n    - Unlikely\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/bacf58c6-e199-4040-a94f-95dea0f1e45a.json","kind":"sigma"}