shashank-elastic
82 lines
3.0 KiB
TOML
82 lines
3.0 KiB
TOML
[metadata]
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creation_date = "2023/08/23"
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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 = "Identifies processes running with unusual extensions that are not typically valid for Windows executables.\n"
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from = "now-119m"
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index = ["logs-endpoint.events.process-*"]
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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 = "Unusual Process Extension"
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risk_score = 21
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rule_id = "800e01be-a7a4-46d0-8de9-69f3c9582b44"
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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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"Data Source: Elastic Defend",
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"Rule Type: BBR",
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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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process where host.os.type == "windows" and event.type == "start" and
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process.executable : "?*" and
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not process.name : ("*.exe", "*.com", "*.scr", "*.tmp", "*.dat") and
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not process.executable :
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(
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"MemCompression",
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"Registry",
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"vmmem",
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"vmmemWSL",
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"?:\\Program Files\\Dell\\SupportAssistAgent\\*.p5x",
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"?:\\Program Files\\Docker\\Docker\\com.docker.service",
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"?:\\Users\\*\\AppData\\Local\\Intel\\AGS\\Libs\\AGSRunner.bin",
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"\\Device\\Mup\\*\\Software Management\\Select.Html.dep",
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"?:\\DJJApplications\\MedicalRecords\\bin\\Select.Html.dep",
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"?:\\ProgramData\\Software Management\\Select.Html.dep",
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"?:\\Program Files (x86)\\EnCase Applications\\Examiner Service\\EnCase64\\enhkey.dll",
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"?:\\Program Files (x86)\\Panda Security\\WAC\\PSNAEInj64.dll",
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"?:\\Program Files (x86)\\Johnson Controls\\LicenseActivator\\crp32002.ngn"
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) and
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not (
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(process.name : "C9632CF058AE4321B6B0B5EA39B710FE" and process.code_signature.subject_name == "Dell Inc") or
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(process.name : "*.upd" and process.code_signature.subject_name == "Bloomberg LP") or
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(process.name: "FD552E21-686E-413C-931D-3B82A9D29F3B" and process.code_signature.subject_name: "Adobe Inc.") or
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(process.name: "3B91051C-AE82-43C9-BCEF-0309CD2DD9EB" and process.code_signature.subject_name: "McAfee, LLC") or
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(process.name: "soffice.bin" and process.code_signature.subject_name: "The Document Foundation") or
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(process.name: ("VeeamVixProxy_*", "{????????-????-????-????-????????????}") and process.code_signature.subject_name: "Veeam Software Group GmbH") or
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(process.name: "1cv8p64.bin" and process.code_signature.subject_name: "LLC 1C-Soft") or
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(process.name: "AGSRunner.bin" and process.code_signature.subject_name: "Intel Corporation")
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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 = "T1036.008"
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name = "Masquerade File Type"
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reference = "https://attack.mitre.org/techniques/T1036/008/"
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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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