shashank-elastic
87 lines
2.9 KiB
TOML
87 lines
2.9 KiB
TOML
[metadata]
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creation_date = "2021/10/07"
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integration = ["windows"]
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maturity = "production"
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min_stack_comments = "Build time field required_fields divergence between -8.7 and 8.8+ due to schema versions."
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min_stack_version = "8.8.0"
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updated_date = "2023/10/23"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies suspicious access to LSASS handle from a call trace pointing to DBGHelp.dll or DBGCore.dll, which both export
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the MiniDumpWriteDump method that can be used to dump LSASS memory content in preparation for credential access.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Credential Access via LSASS Memory Dump"
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references = [
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"https://www.ired.team/offensive-security/credential-access-and-credential-dumping/dump-credentials-from-lsass-process-without-mimikatz",
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"https://www.elastic.co/security-labs/detect-credential-access",
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]
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risk_score = 73
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rule_id = "9960432d-9b26-409f-972b-839a959e79e2"
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setup = """
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
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events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
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Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
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`event.ingested` to @timestamp.
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For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
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"""
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Tactic:Execution", "Data Source: Sysmon Only"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where host.os.type == "windows" and event.code == "10" and
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winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and
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/* DLLs exporting MiniDumpWriteDump API to create an lsass mdmp*/
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winlog.event_data.CallTrace : ("*dbghelp*", "*dbgcore*") and
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/* case of lsass crashing */
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not process.executable : (
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"?:\\Windows\\System32\\WerFault.exe",
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"?:\\Windows\\SysWOW64\\WerFault.exe",
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"?:\\Windows\\System32\\WerFaultSecure.exe"
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)
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1003"
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name = "OS Credential Dumping"
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reference = "https://attack.mitre.org/techniques/T1003/"
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[[rule.threat.technique.subtechnique]]
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id = "T1003.001"
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name = "LSASS Memory"
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reference = "https://attack.mitre.org/techniques/T1003/001/"
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[rule.threat.tactic]
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id = "TA0006"
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name = "Credential Access"
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reference = "https://attack.mitre.org/tactics/TA0006/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1106"
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name = "Native API"
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reference = "https://attack.mitre.org/techniques/T1106/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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