Justin Ibarra
71 lines
2.0 KiB
TOML
71 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2020/09/02"
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maturity = "production"
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updated_date = "2021/03/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies a suspicious file that was written by a PDF reader application and subsequently executed. These processes are
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often launched via exploitation of PDF applications.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Execution of File Written or Modified by PDF Reader"
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risk_score = 21
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rule_id = "1defdd62-cd8d-426e-a246-81a37751bb2b"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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type = "eql"
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query = '''
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sequence with maxspan=2h
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[file where event.type != "deletion" and file.extension : "exe" and
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(process.name : "AcroRd32.exe" or
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process.name : "rdrcef.exe" or
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process.name : "FoxitPhantomPDF.exe" or
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process.name : "FoxitReader.exe") and
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not (file.name : "FoxitPhantomPDF.exe" or
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file.name : "FoxitPhantomPDFUpdater.exe" or
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file.name : "FoxitReader.exe" or
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file.name : "FoxitReaderUpdater.exe" or
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file.name : "AcroRd32.exe" or
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file.name : "rdrcef.exe")
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] by host.id, file.path
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[process where event.type in ("start", "process_started")] by host.id, process.executable
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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 = "T1566"
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name = "Phishing"
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reference = "https://attack.mitre.org/techniques/T1566/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.001"
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name = "Spearphishing Attachment"
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reference = "https://attack.mitre.org/techniques/T1566/001/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.002"
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name = "Spearphishing Link"
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reference = "https://attack.mitre.org/techniques/T1566/002/"
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[rule.threat.tactic]
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id = "TA0001"
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name = "Initial Access"
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reference = "https://attack.mitre.org/tactics/TA0001/"
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