sigmahighHunting

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.

MITRE ATT&CK

T1562

defense-evasion

Detection Query

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.exe
condition: selection

Author

@gott_cyber

Created

2024-01-08

Data Sources

windowssecurity

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562

Raw Content

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-evasion
    - attack.t1562
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: high