IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Suspicious Lsass Process Access
editSuspicious Lsass Process Access
editIdentifies access attempts to LSASS handle, this may indicate an attempt to dump credentials from Lsass memory.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-windows.*
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:
- Elastic
- Host
- Windows
- Threat Detection
- Credential Access
- Sysmon Only
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Setup
Rule query
editprocess 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 : ("?:\\Windows\\System32\\lsm.exe", "?:\\Program Files\\*", "?:\\Program Files (x86)\\*", "?:\\Windows\\System32\\msiexec.exe", "?:\\Windows\\CCM\\CcmExec.exe", "?:\\Windows\\system32\\csrss.exe", "?:\\Windows\\system32\\wininit.exe", "?:\\Windows\\system32\\wbem\\wmiprvse.exe", "?:\\Windows\\system32\\MRT.exe", "?:\\ProgramData\\Microsoft\\Windows Defender\\platform\\*", "?:\\ProgramData\\WebEx\\webex\\*", "?:\\Windows\\LTSvc\\LTSVC.exe") and not winlog.event_data.CallTrace : ("*mpengine.dll*", "*appresolver.dll*", "*sysmain.dll*")
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/
-
Sub-technique:
- Name: LSASS Memory
- ID: T1003.001
- Reference URL: https://attack.mitre.org/techniques/T1003/001/