Elastic medium stable eql

Suspicious Lsass Process Access

Identifies access attempts to LSASS handle, this may indicate an attempt to dump credentials from Lsass memory.

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Detection Logic

process where host.os.type == "windows" and event.code == "10" and
  winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and
  not winlog.event_data.GrantedAccess :
                ("0x1000", "0x1400", "0x101400", "0x101000", "0x101001", "0x100000", "0x100040", "0x3200", "0x40", "0x3200") and
  not process.name : ("procexp64.exe", "procmon.exe", "procexp.exe", "Microsoft.Identity.AadConnect.Health.AadSync.Host.ex") and
  not process.executable : (
        "?:\\ProgramData\\Microsoft\\Windows Defender\\platform\\*",
        "?:\\ProgramData\\WebEx\\webex\\*",
        "?:\\Program Files (x86)\\*",
        "?:\\Program Files\\*",
        "?:\\Windows\\CCM\\CcmExec.exe",
        "?:\\Windows\\LTSvc\\LTSVC.exe",
        "?:\\Windows\\Sysmon.exe",
        "?:\\Windows\\Sysmon64.exe",
        "C:\\Windows\\CynetMS.exe",
        "?:\\Windows\\system32\\csrss.exe",
        "?:\\Windows\\System32\\lsm.exe",
        "?:\\Windows\\system32\\MRT.exe",
        "?:\\Windows\\System32\\msiexec.exe",
        "?:\\Windows\\system32\\wbem\\wmiprvse.exe",
        "?:\\Windows\\system32\\wininit.exe",
        "?:\\Windows\\SystemTemp\\GUM*.tmp\\GoogleUpdate.exe",
        "?:\\Windows\\sysWOW64\\wbem\\wmiprvse.exe",
        "C:\\oracle\\64\\02\\instantclient_19_13\\sqlplus.exe",
        "C:\\oracle\\64\\02\\instantclient_19_13\\sqlldr.exe",
        "d:\\oracle\\product\\19\\dbhome1\\bin\\ORACLE.EXE",
        "C:\\wamp\\bin\\apache\\apache*\\bin\\httpd.exe",
        "C:\\Windows\\system32\\netstat.exe",
        "C:\\PROGRA~1\\INFORM~1\\apps\\jdk\\*\\jre\\bin\\java.exe",
        "C:\\PROGRA~2\\CyberCNSAgentV2\\osqueryi.exe",
        "C:\\Utilityw2k19\\packetbeat\\packetbeat.exe",
        "C:\\ProgramData\\Cisco\\Cisco AnyConnect Secure Mobility Client\\Temp\\CloudUpdate\\vpndownloader.exe",
        "C:\\ProgramData\\Cisco\\Cisco Secure Client\\Temp\\CloudUpdate\\vpndownloader.exe"
  ) and
  not winlog.event_data.CallTrace : ("*mpengine.dll*", "*appresolver.dll*", "*sysmain.dll*")

Field Validations

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