Suspicious Lsass Process Access

Last updated 6 months ago on 2025-03-20
Created 3 years ago on 2023-01-22

About

Identifies access attempts to LSASS handle, this may indicate an attempt to dump credentials from Lsass memory.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Credential AccessData Source: SysmonLanguage: eql
Severity
medium
Risk Score
47
MITRE ATT&CK™

Credential Access (TA0006)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-windows.sysmon_operational-*
Related Integrations

windows(opens in a new tab or window)

Query
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*")

Install detection rules in Elastic Security

Detect Suspicious Lsass Process Access in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).