Windows Filtering Platform Blocked Connection From EDR Agent Binary

Severity: high
Author: @gott_cyber
Source: upstream

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 coverage

Tactic	Techniques
Defense Evasion	`T1562` Impair Defenses

Event coverage

Provider	Event ID	Title
Security-Auditing	5157	The Windows Filtering Platform has blocked a connection.

Stages and Predicates

Stage 1: `selection`

or:
Application|endswith: '\AmSvc.exe'
Application|endswith: '\CETASvc.exe'
Application|endswith: '\CNTAoSMgr.exe'
Application|endswith: '\CSFalconContainer.exe'
Application|endswith: '\CSFalconService.exe'
Application|endswith: '\CrAmTray.exe'
Application|endswith: '\CrsSvc.exe'
Application|endswith: '\CybereasonAV.exe'
Application|endswith: '\CylanceSvc.exe'
Application|endswith: '\CyveraService.exe'
Application|endswith: '\CyvrFsFlt.exe'
Application|endswith: '\EIConnector.exe'
Application|endswith: '\EndpointBasecamp.exe'
Application|endswith: '\ExecutionPreventionSvc.exe'
Application|endswith: '\LogProcessorService.exe'
Application|endswith: '\MsMpEng.exe'
Application|endswith: '\MsSense.exe'
Application|endswith: '\Ntrtscan.exe'
Application|endswith: '\PccNTMon.exe'
Application|endswith: '\QualysAgent.exe'
Application|endswith: '\RepMgr.exe'
Application|endswith: '\RepUtils.exe'
Application|endswith: '\RepUx.exe'
Application|endswith: '\RepWAV.exe'
Application|endswith: '\RepWSC.exe'
Application|endswith: '\SenseCncProxy.exe'
Application|endswith: '\SenseIR.exe'
Application|endswith: '\SenseNdr.exe'
Application|endswith: '\SenseSampleUploader.exe'
Application|endswith: '\SentinelAgent.exe'
Application|endswith: '\SentinelAgentWorker.exe'
Application|endswith: '\SentinelBrowserNativeHost.exe'
Application|endswith: '\SentinelHelperService.exe'
Application|endswith: '\SentinelServiceHost.exe'
Application|endswith: '\SentinelStaticEngine.exe'
Application|endswith: '\SentinelStaticEngineScanner.exe'
Application|endswith: '\TMBMSRV.exe'
Application|endswith: '\TaniumCX.exe'
Application|endswith: '\TaniumClient.exe'
Application|endswith: '\TaniumDetectEngine.exe'
Application|endswith: '\TmCCSF.exe'
Application|endswith: '\TmListen.exe'
Application|endswith: '\TmWSCSvc.exe'
Application|endswith: '\Traps.exe'
Application|endswith: '\WSCommunicator.exe'
Application|endswith: '\cb.exe'
Application|endswith: '\cyserver.exe'
Application|endswith: '\elastic-agent.exe'
Application|endswith: '\elastic-endpoint.exe'
Application|endswith: '\filebeat.exe'
Application|endswith: '\fortiedr.exe'
Application|endswith: '\hmpalert.exe'
Application|endswith: '\hurukai.exe'
Application|endswith: '\mcsagent.exe'
Application|endswith: '\mcsclient.exe'
Application|endswith: '\sedservice.exe'
Application|endswith: '\sfc.exe'
Application|endswith: '\sophos ui.exe'
Application|endswith: '\sophosLivequeryservice.exe'
Application|endswith: '\sophosfilescanner.exe'
Application|endswith: '\sophosfs.exe'
Application|endswith: '\sophoshealth.exe'
Application|endswith: '\sophosips.exe'
Application|endswith: '\sophosnetfilter.exe'
Application|endswith: '\sophosntpservice.exe'
Application|endswith: '\sophososquery.exe'
Application|endswith: '\sspservice.exe'
Application|endswith: '\winlogbeat.exe'
Application|endswith: '\xagt.exe'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.