Potential Evasion via Windows Filtering Platform

edit

Potential Evasion via Windows Filtering Platform

edit

Identifies multiple Windows Filtering Platform block events and where the process name is related to an endpoint security software. Adversaries may add malicious WFP rules to prevent Endpoint security from sending telemetry.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-windows.*
  • logs-system.security-*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Data Source: Elastic Defend

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Setup

edit

Setup

The Filtering Platform Connection logging policy must be configured for (Success, Failure). Steps to implement the logging policy with Advanced Audit Configuration:

Computer Configuration >
Policies >
Windows Settings >
Security Settings >
Advanced Audit Policies Configuration >
Audit Policies >
Object Access >
Filtering Platform Connection (Success,Failure)

Rule query

edit
sequence by winlog.computer_name with maxspan=1m
 [network where host.os.type == "windows" and
  event.action : ("windows-firewall-packet-block", "windows-firewall-packet-drop") and
  process.name : (
        "bdagent.exe", "bdreinit.exe", "pdscan.exe", "pdiface.exe", "BDSubWiz.exe", "ProductAgentService.exe",
        "ProductAgentUI.exe", "WatchDog.exe", "CarbonBlackClientSetup.exe", "TrGUI.exe", "TracCAPI.exe", "cpmsi_tool.exe",
        "trac.exe", "vna_install64.exe", "vna_utils.exe", "TracSrvWrapper.exe", "vsmon.exe", "p95tray.exe",
        "CybereasonRansomFreeServiceHost.exe", "CrAmTray.exe", "minionhost.exe", "CybereasonSensor.exe", "CylanceUI.exe",
        "CylanceProtectSetup.exe", "cylancesvc.exe", "cyupdate.exe", "elastic-agent.exe", "elastic-endpoint.exe",
        "egui.exe", "minodlogin.exe", "emu-rep.exe", "emu_install.exe", "emu-cci.exe", "emu-gui.exe", "emu-uninstall.exe",
        "ndep.exe", "spike.exe", "ecls.exe", "ecmd.exe", "ecomserver.exe", "eeclnt.exe", "eh64.exe", "EHttpSrv.exe",
        "xagt.exe", "collectoragent.exe", "FSAEConfig.exe", "uninstalldcagent.exe", "rmon.exe", "fccomint.exe",
        "fclanguageselector.exe", "fortifw.exe", "fcreg.exe", "fortitray.exe", "fcappdb.exe", "fcwizard.exe", "submitv.exe",
        "av_task.exe", "fortiwf.exe", "fortiwadbd.exe", "fcauth.exe", "fcdblog.exe", "fcmgr.exe", "fortiwad.exe",
        "fortiproxy.exe", "fortiscand.exe", "fortivpnst.exe", "ipsec.exe", "fcwscd7.exe", "fcasc.exe", "fchelper.exe",
        "forticlient.exe","fcwsc.exe", "FortiClient.exe", "fmon.exe", "FSSOMA.exe", "FCVbltScan.exe", "FortiESNAC.exe",
        "EPCUserAvatar.exe", "FortiAvatar.exe", "FortiClient_Diagnostic_Tool.exe", "FortiSSLVPNdaemon.exe", "avp.exe",
        "FCConfig.exe", "avpsus.exe", "klnagent.exe", "klnsacwsrv.exe", "kl_platf.exe", "stpass.exe", "klnagwds.exe",
        "mbae.exe", "mbae64.exe", "mbae-svc.exe", "mbae-uninstaller.exe", "mbaeLoader32.exe", "mbaeloader64.exe",
        "mbam-dor.exe", "mbamgui.exe", "mbamservice.exe", "mbamtrayctrl.exe", "mbampt.exe", "mbamscheduler.exe",
        "Coreinst.exe", "mbae-setup.exe", "mcupdate.exe", "ProtectedModuleHost.exe", "ESConfigTool.exe", "FWInstCheck.exe",
        "FwWindowsFirewallHandler.exe", "mfeesp.exe", "mfefw.exe", "mfeProvisionModeUtility.exe", "mfetp.exe", "avpui.exe",
        "WscAVExe.exe", "mcshield.exe", "McChHost.exe", "mfewc.exe", "mfewch.exe", "mfewcui.exe", "fwinfo.exe",
        "mfecanary.exe", "mfefire.exe", "mfehidin.exe", "mfemms.exe", "mfevtps.exe", "mmsinfo.exe", "vtpinfo.exe",
        "MarSetup.exe", "mctray.exe", "masvc.exe", "macmnsvc.exe", "McAPExe.exe", "McPvTray.exe", "mcods.exe",
        "mcuicnt.exe", "mcuihost.exe", "xtray.exe", "McpService.exe", "epefprtrainer.exe", "mfeffcoreservice.exe",
        "MfeEpeSvc.exe", "qualysagent.exe", "QualysProxy.exe", "QualysAgentUI.exe", "SVRTgui.exe", "SVRTcli.exe",
        "SVRTcli.exe", "SVRTgui.exe", "SCTCleanupService.exe", "SVRTservice.exe", "native.exe", "SCTBootTasks.exe",
        "ALMon.exe", "SAA.exe", "SUMService.exe", "ssp.exe", "SCFService.exe", "SCFManager.exe", "spa.exe", "cabarc.exe",
        "sargui.exe", "sntpservice.exe", "McsClient.exe", "McsAgent.exe", "McsHeartbeat.exe", "SAVAdminService.exe",
        "sav32cli.exe", "ForceUpdateAlongSideSGN.exe", "SAVCleanupService.exe", "SavMain.exe", "SavProgress.exe",
        "SavProxy.exe", "SavService.exe", "swc_service.exe", "swi_di.exe", "swi_service.exe", "swi_filter.exe",
        "ALUpdate.exe", "SophosUpdate.exe", "ALsvc.exe", "SophosAlert.exe", "osCheck.exe", "N360Downloader.exe",
        "InstWrap.exe", "symbos.exe", "nss.exe", "symcorpui.exe", "isPwdSvc.exe", "ccsvchst.exe", "ntrmv.exe",
        "pccntmon.exe", "AosUImanager.exe", "NTRTScan.exe", "TMAS_OL.exe", "TMAS_OLImp.exe", "TMAS_OLSentry.exe",
        "ufnavi.exe", "Clnrbin.exe", "vizorhtmldialog.exe", "pwmConsole.exe", "PwmSvc.exe", "coreServiceShell.exe",
        "ds_agent.exe", "SfCtlCom.exe", "MBAMHelper.exe", "cb.exe", "smc.exe", "tda.exe", "xagtnotif.exe", "ekrn.exe",
        "dsa.exe", "Notifier.exe", "rphcp.exe", "lc_sensor.exe", "CSFalconService.exe", "CSFalconController.exe",
        "SenseSampleUploader.exe", "windefend.exe", "MSASCui.exe", "MSASCuiL.exe", "msmpeng.exe", "msmpsvc.exe",
        "MsSense.exe", "esensor.exe", "sentinelone.exe", "tmccsf.exe", "csfalconcontainer.exe", "sensecncproxy.exe",
        "splunk.exe", "sysmon.exe", "sysmon64.exe", "taniumclient.exe"
    )] with runs=5

Framework: MITRE ATT&CKTM