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)
59 lines
1.8 KiB
TOML
59 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2021/10/17"
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updated_date = "2022/03/31"
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maturity = "production"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies suspicious renamed COMSVCS.DLL Image Load, which exports the MiniDump function that can be used to dump a
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process memory. This may indicate an attempt to dump LSASS memory while bypassing command-line based detection in
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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 Renamed COM+ Services DLL"
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note = """## Config
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You will need to enable logging of ImageLoads in your Sysmon configuration to include COMSVCS.DLL by Imphash or Original
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File Name."""
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references = ["https://modexp.wordpress.com/2019/08/30/minidumpwritedump-via-com-services-dll/"]
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risk_score = 73
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rule_id = "c5c9f591-d111-4cf8-baec-c26a39bc31ef"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Credential Access"]
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type = "eql"
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query = '''
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sequence by process.entity_id with maxspan=1m
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[process where event.category == "process" and
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process.name : "rundll32.exe"]
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[process where event.category == "process" and event.dataset : "windows.sysmon_operational" and event.code == "7" and
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(file.pe.original_file_name : "COMSVCS.DLL" or file.pe.imphash : "EADBCCBB324829ACB5F2BBE87E5549A8") and
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/* renamed COMSVCS */
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not file.name : "COMSVCS.DLL"]
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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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reference = "https://attack.mitre.org/techniques/T1003/"
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id = "T1003"
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name = "OS Credential Dumping"
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[[rule.threat.technique.subtechnique]]
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reference = "https://attack.mitre.org/techniques/T1003/001/"
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id = "T1003.001"
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name = "LSASS Memory"
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[rule.threat.tactic]
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reference = "https://attack.mitre.org/tactics/TA0006/"
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id = "TA0006"
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name = "Credential Access"
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