shashank-elastic
57 lines
1.7 KiB
TOML
57 lines
1.7 KiB
TOML
[metadata]
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creation_date = "2023/09/27"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2024/05/21"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies process execution from a removable media and by an unusual process. Adversaries may move onto systems,
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possibly those on disconnected or air-gapped networks, by copying malware to removable media and taking advantage of
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Autorun features when the media is inserted into a system and executes.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.process-*", "logs-endpoint.events.network-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Execution from a Removable Media with Network Connection"
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risk_score = 21
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rule_id = "1542fa53-955e-4330-8e4d-b2d812adeb5f"
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Initial Access",
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"Data Source: Elastic Defend",
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]
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type = "eql"
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query = '''
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sequence by process.entity_id with maxspan=5m
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[process where host.os.type == "windows" and event.action == "start" and
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/* Direct Exec from USB */
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(process.Ext.device.bus_type : "usb" or process.Ext.device.product_id : "USB *") and
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(process.code_signature.trusted == false or process.code_signature.exists == false) and
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not process.code_signature.status : ("errorExpired", "errorCode_endpoint*")]
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[network where host.os.type == "windows" and event.action == "connection_attempted"]
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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 = "T1091"
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name = "Replication Through Removable Media"
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reference = "https://attack.mitre.org/techniques/T1091/"
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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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