[metadata]
creation_date = "2021/10/07"
integration = ["windows"]
maturity = "production"
min_stack_comments = "Build time field required_fields divergence between -8.7 and 8.8+ due to schema versions."
min_stack_version = "8.8.0"
updated_date = "2023/10/23"

[rule]
author = ["Elastic"]
description = """
Identifies suspicious access to LSASS handle from a call trace pointing to DBGHelp.dll or DBGCore.dll, which both export
the MiniDumpWriteDump method that can be used to dump LSASS memory content in preparation for credential access.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Credential Access via LSASS Memory Dump"
references = [
    "https://www.ired.team/offensive-security/credential-access-and-credential-dumping/dump-credentials-from-lsass-process-without-mimikatz",
    "https://www.elastic.co/security-labs/detect-credential-access",
]
risk_score = 73
rule_id = "9960432d-9b26-409f-972b-839a959e79e2"
setup = """

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
`event.ingested` to @timestamp.
For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
"""
severity = "high"
tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Tactic:Execution", "Data Source: Sysmon Only"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "windows" and event.code == "10" and
  winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and

   /* DLLs exporting MiniDumpWriteDump API to create an lsass mdmp*/
  winlog.event_data.CallTrace : ("*dbghelp*", "*dbgcore*") and

   /* case of lsass crashing */
  not process.executable : (
        "?:\\Windows\\System32\\WerFault.exe",
        "?:\\Windows\\SysWOW64\\WerFault.exe",
        "?:\\Windows\\System32\\WerFaultSecure.exe"
      )
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1003"
name = "OS Credential Dumping"
reference = "https://attack.mitre.org/techniques/T1003/"
[[rule.threat.technique.subtechnique]]
id = "T1003.001"
name = "LSASS Memory"
reference = "https://attack.mitre.org/techniques/T1003/001/"



[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1106"
name = "Native API"
reference = "https://attack.mitre.org/techniques/T1106/"


[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"