Potential Credential Access via DuplicateHandle in LSASSedit
Identifies suspicious access to an LSASS handle via DuplicateHandle from an unknown call trace module. This may indicate an attempt to bypass the NtOpenProcess API to evade detection and dump LSASS memory for credential access.
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:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Credential Access
- Data Source: Sysmon Only
Version: 207
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
process where host.os.type == "windows" and event.code == "10" and /* LSASS requesting DuplicateHandle access right to another process */ process.name : "lsass.exe" and winlog.event_data.GrantedAccess == "0x40" and /* call is coming from an unknown executable region */ winlog.event_data.CallTrace : "*UNKNOWN*"
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/