Jonhnathan
74222f86eb
* [New Rules] [BBR] Windows Deprecated ERs Conversion - 3 * Update defense_evasion_invalid_codesign_imageload.toml * Update defense_evasion_invalid_codesign_imageload.toml * Update rules_building_block/initial_access_execution_remote_via_msiexec.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> * Update rules_building_block/initial_access_xsl_script_execution_via_com.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> * Update rules_building_block/initial_access_execution_remote_via_msiexec.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> --------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
52 lines
1.8 KiB
TOML
52 lines
1.8 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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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 = "2023/09/27"
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bypass_bbr_timing = true
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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.*"]
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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 = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Rule Type: BBR", "Data Source: Elastic Defend"]
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building_block_type = "default"
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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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