Justin Ibarra
eeb8ab7744
* Expand timestamp_override tests
* removed timestamp_override from eql sequence rules
* add config entry for eql rules with beats index and t_o
* add timestamp_override to missing fields
Removed changes from:
- rules/cross-platform/impact_hosts_file_modified.toml
- rules/windows/credential_access_lsass_memdump_file_created.toml
- rules/windows/defense_evasion_adding_the_hidden_file_attribute_with_via_attribexe.toml
- rules/windows/defense_evasion_execution_lolbas_wuauclt.toml
- rules/windows/defense_evasion_suspicious_certutil_commands.toml
- rules/windows/execution_command_shell_started_by_svchost.toml
(selectively cherry picked from commit 6bdfddac8e)
61 lines
2.0 KiB
TOML
61 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2021/10/07"
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maturity = "production"
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updated_date = "2022/03/31"
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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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note = """## Config
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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 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
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"""
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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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]
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risk_score = 73
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rule_id = "9960432d-9b26-409f-972b-839a959e79e2"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Credential Access"]
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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 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 : ("?:\\Windows\\System32\\WerFault.exe", "?:\\Windows\\System32\\WerFaultSecure.exe")
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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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