shashank-elastic
80 lines
2.9 KiB
TOML
80 lines
2.9 KiB
TOML
[metadata]
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creation_date = "2021/01/19"
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integration = ["endpoint", "windows"]
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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 = "2023/10/23"
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[rule]
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author = ["Elastic"]
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description = """
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Masquerading can allow an adversary to evade defenses and better blend in with the environment. One way it occurs is
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when the name or location of a file is manipulated as a means of tricking a user into executing what they think is a
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benign file type but is actually executable code.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*", "endgame-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Executable File Creation with Multiple Extensions"
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risk_score = 47
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rule_id = "8b2b3a62-a598-4293-bc14-3d5fa22bb98f"
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setup = """
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
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events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
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Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
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`event.ingested` to @timestamp.
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For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
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"""
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severity = "medium"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Data Source: Elastic Endgame", "Data Source: Elastic Defend"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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file where host.os.type == "windows" and event.type == "creation" and file.extension : "exe" and
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file.name regex~ """.*\.(vbs|vbe|bat|js|cmd|wsh|ps1|pdf|docx?|xlsx?|pptx?|txt|rtf|gif|jpg|png|bmp|hta|txt|img|iso)\.exe""" and
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not (process.executable : ("?:\\Windows\\System32\\msiexec.exe", "C:\\Users\\*\\QGIS_SCCM\\Files\\QGIS-OSGeo4W-*-Setup-x86_64.exe") and
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file.path : "?:\\Program Files\\QGIS *\\apps\\grass\\*.exe") and
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not process.executable : ("/bin/sh", "/usr/sbin/MailScanner", "/usr/bin/perl")
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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 = "T1036.007"
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name = "Double File Extension"
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reference = "https://attack.mitre.org/techniques/T1036/007/"
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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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1204"
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name = "User Execution"
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reference = "https://attack.mitre.org/techniques/T1204/"
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[[rule.threat.technique.subtechnique]]
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id = "T1204.002"
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name = "Malicious File"
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reference = "https://attack.mitre.org/techniques/T1204/002/"
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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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