shashank-elastic
63 lines
1.6 KiB
TOML
63 lines
1.6 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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building_block_type = "default"
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description = """
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Identifies binaries that are loaded and with an invalid code signature. This may indicate an attempt to masquerade as a
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signed binary.
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"""
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from = "now-119m"
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index = ["logs-endpoint.events.library-*"]
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interval = "60m"
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language = "eql"
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license = "Elastic License v2"
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name = "Image Loaded with Invalid Signature"
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risk_score = 21
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rule_id = "fd9484f2-1c56-44ae-8b28-dc1354e3a0e8"
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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: Defense Evasion",
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"Rule Type: BBR",
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"Data Source: Elastic Defend",
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]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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library where host.os.type == "windows" and event.action == "load" and
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dll.code_signature.status : ("errorUntrustedRoot", "errorBadDigest", "errorUntrustedRoot") and
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(dll.Ext.relative_file_creation_time <= 500 or dll.Ext.relative_file_name_modify_time <= 500) and
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not startswith~(dll.name, process.name) and
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not dll.path : (
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"?:\\Windows\\System32\\DriverStore\\FileRepository\\*"
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)
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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 = "T1036"
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name = "Masquerading"
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reference = "https://attack.mitre.org/techniques/T1036/"
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[[rule.threat.technique.subtechnique]]
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id = "T1036.001"
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name = "Invalid Code Signature"
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reference = "https://attack.mitre.org/techniques/T1036/001/"
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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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