Justin Ibarra
59da2da474
* add unit tests to ensure host type and platform are included * add host.os.name 'linux' to all linux rules * add host.os.name macos to mac rules * add host.os.name to windows rules; fix linux dates * update from host.os.name to host.os.type Co-authored-by: brokensound77 <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
61 lines
2.0 KiB
TOML
61 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2021/10/17"
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integration = ["windows"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/02/22"
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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 = """## Setup
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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", "Sysmon Only"]
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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 host.os.type == "windows" and event.category == "process" and
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process.name : "rundll32.exe"]
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[process where host.os.type == "windows" and 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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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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