Justin Ibarra
645a0cd67b
* [Rule Tuning] Add timestamp_override field to rules * add tests for lookback and timestamp_override * fix dates and add test to ensure updated > creation
62 lines
1.8 KiB
TOML
62 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2020/02/18"
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maturity = "production"
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updated_date = "2021/02/16"
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[rule]
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author = ["Elastic"]
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description = """
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Compiled HTML files (.chm) are commonly distributed as part of the Microsoft HTML Help system. Adversaries may conceal
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malicious code in a CHM file and deliver it to a victim for execution. CHM content is loaded by the HTML Help executable
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program (hh.exe).
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"""
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false_positives = [
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"""
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The HTML Help executable program (hh.exe) runs whenever a user clicks a compiled help (.chm) file or menu item that
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opens the help file inside the Help Viewer. This is not always malicious, but adversaries may abuse this technology
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to conceal malicious code.
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""",
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]
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "kuery"
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license = "Elastic License"
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name = "Process Activity via Compiled HTML File"
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risk_score = 21
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rule_id = "e3343ab9-4245-4715-b344-e11c56b0a47f"
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severity = "low"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:process and event.type:(start or process_started) and process.name:hh.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.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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1218"
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name = "Signed Binary Proxy Execution"
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reference = "https://attack.mitre.org/techniques/T1218/"
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[[rule.threat.technique.subtechnique]]
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id = "T1218.001"
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name = "Compiled HTML File"
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reference = "https://attack.mitre.org/techniques/T1218/001/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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