Windows Filtering Platform Blocked Connection From EDR Agent Binary
Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents. Adversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events.
Detection logic
selection
EventID: 5157
Application|endswith:
- \AmSvc.exe
- \cb.exe
- \CETASvc.exe
- \CNTAoSMgr.exe
- \CrAmTray.exe
- \CrsSvc.exe
- \CSFalconContainer.exe
- \CSFalconService.exe
- \CybereasonAV.exe
- \CylanceSvc.exe
- \cyserver.exe
- \CyveraService.exe
- \CyvrFsFlt.exe
- \EIConnector.exe
- \elastic-agent.exe
- \elastic-endpoint.exe
- \EndpointBasecamp.exe
- \ExecutionPreventionSvc.exe
- \filebeat.exe
- \fortiedr.exe
- \hmpalert.exe
- \hurukai.exe
- \LogProcessorService.exe
- \mcsagent.exe
- \mcsclient.exe
- \MsMpEng.exe
- \MsSense.exe
- \Ntrtscan.exe
- \PccNTMon.exe
- \QualysAgent.exe
- \RepMgr.exe
- \RepUtils.exe
- \RepUx.exe
- \RepWAV.exe
- \RepWSC.exe
- \sedservice.exe
- \SenseCncProxy.exe
- \SenseIR.exe
- \SenseNdr.exe
- \SenseSampleUploader.exe
- \SentinelAgent.exe
- \SentinelAgentWorker.exe
- \SentinelBrowserNativeHost.exe
- \SentinelHelperService.exe
- \SentinelServiceHost.exe
- \SentinelStaticEngine.exe
- \SentinelStaticEngineScanner.exe
- \sfc.exe
- \sophos ui.exe
- \sophosfilescanner.exe
- \sophosfs.exe
- \sophoshealth.exe
- \sophosips.exe
- \sophosLivequeryservice.exe
- \sophosnetfilter.exe
- \sophosntpservice.exe
- \sophososquery.exe
- \sspservice.exe
- \TaniumClient.exe
- \TaniumCX.exe
- \TaniumDetectEngine.exe
- \TMBMSRV.exe
- \TmCCSF.exe
- \TmListen.exe
- \TmWSCSvc.exe
- \Traps.exe
- \winlogbeat.exe
- \WSCommunicator.exe
- \xagt.exeCondition
selectionRaw YAML
title: Windows Filtering Platform Blocked Connection From EDR Agent Binary
id: bacf58c6-e199-4040-a94f-95dea0f1e45a
status: test
description: |
Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents.
Adversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events.
references:
- https://github.com/netero1010/EDRSilencer
- https://github.com/amjcyber/EDRNoiseMaker
- https://ghoulsec.medium.com/misc-series-4-forensics-on-edrsilencer-events-428b20b3f983
author: '@gott_cyber'
date: 2024-01-08
tags:
- attack.defense-impairment
- attack.t1685
logsource:
product: windows
service: security
definition: 'Requirements: Audit Filtering Platform Connection needs to be enabled'
detection:
selection:
EventID: 5157
Application|endswith:
- '\AmSvc.exe' # Cybereason
- '\cb.exe' # Carbon Black EDR
- '\CETASvc.exe' # TrendMicro Apex One
- '\CNTAoSMgr.exe' # TrendMicro Apex One
- '\CrAmTray.exe' # Cybereason
- '\CrsSvc.exe' # Cybereason
- '\CSFalconContainer.exe' # CrowdStrike Falcon
- '\CSFalconService.exe' # CrowdStrike Falcon
- '\CybereasonAV.exe' # Cybereason
- '\CylanceSvc.exe' # Cylance
- '\cyserver.exe' # Palo Alto Networks Traps/Cortex XDR
- '\CyveraService.exe' # Palo Alto Networks Traps/Cortex XDR
- '\CyvrFsFlt.exe' # Palo Alto Networks Traps/Cortex XDR
- '\EIConnector.exe' # ESET Inspect
- '\elastic-agent.exe' # Elastic EDR
- '\elastic-endpoint.exe' # Elastic EDR
- '\EndpointBasecamp.exe' # TrendMicro Apex One
- '\ExecutionPreventionSvc.exe' # Cybereason
- '\filebeat.exe' # Elastic EDR
- '\fortiedr.exe' # FortiEDR
- '\hmpalert.exe' # Sophos EDR
- '\hurukai.exe' # Harfanglab EDR
- '\LogProcessorService.exe' # SentinelOne
- '\mcsagent.exe' # Sophos EDR
- '\mcsclient.exe' # Sophos EDR
- '\MsMpEng.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\MsSense.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\Ntrtscan.exe' # TrendMicro Apex One
- '\PccNTMon.exe' # TrendMicro Apex One
- '\QualysAgent.exe' # Qualys EDR
- '\RepMgr.exe' # Carbon Black Cloud
- '\RepUtils.exe' # Carbon Black Cloud
- '\RepUx.exe' # Carbon Black Cloud
- '\RepWAV.exe' # Carbon Black Cloud
- '\RepWSC.exe' # Carbon Black Cloud
- '\sedservice.exe' # Sophos EDR
- '\SenseCncProxy.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\SenseIR.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\SenseNdr.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\SenseSampleUploader.exe' # Microsoft Defender for Endpoint and Microsoft Defender Antivirus
- '\SentinelAgent.exe' # SentinelOne
- '\SentinelAgentWorker.exe' # SentinelOne
- '\SentinelBrowserNativeHost.exe' # SentinelOne
- '\SentinelHelperService.exe' # SentinelOne
- '\SentinelServiceHost.exe' # SentinelOne
- '\SentinelStaticEngine.exe' # SentinelOne
- '\SentinelStaticEngineScanner.exe' # SentinelOne
- '\sfc.exe' # Cisco Secure Endpoint (Formerly Cisco AMP)
- '\sophos ui.exe' # Sophos EDR
- '\sophosfilescanner.exe' # Sophos EDR
- '\sophosfs.exe' # Sophos EDR
- '\sophoshealth.exe' # Sophos EDR
- '\sophosips.exe' # Sophos EDR
- '\sophosLivequeryservice.exe' # Sophos EDR
- '\sophosnetfilter.exe' # Sophos EDR
- '\sophosntpservice.exe' # Sophos EDR
- '\sophososquery.exe' # Sophos EDR
- '\sspservice.exe' # Sophos EDR
- '\TaniumClient.exe' # Tanium
- '\TaniumCX.exe' # Tanium
- '\TaniumDetectEngine.exe' # Tanium
- '\TMBMSRV.exe' # TrendMicro Apex One
- '\TmCCSF.exe' # TrendMicro Apex One
- '\TmListen.exe' # TrendMicro Apex One
- '\TmWSCSvc.exe' # TrendMicro Apex One
- '\Traps.exe' # Palo Alto Networks Traps/Cortex XDR
- '\winlogbeat.exe' # Elastic EDR
- '\WSCommunicator.exe' # TrendMicro Apex One
- '\xagt.exe' # Trellix EDR
condition: selection
falsepositives:
- Unlikely
level: highFalse positives
- Unlikely