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: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Setup
Rule query
editprocess where 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/