Justin Ibarra
46d5e37b76
* min_stack all rules to 8.3 * bump date Co-authored-by: Mika Ayenson <mika.ayenson@elastic.co>
56 lines
1.9 KiB
TOML
56 lines
1.9 KiB
TOML
[metadata]
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creation_date = "2020/11/29"
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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 = "2022/08/24"
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[rule]
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author = ["Elastic"]
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description = """
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A scheduled task was created by a Windows script via cscript.exe, wscript.exe or powershell.exe. This can be abused by
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an adversary to establish persistence.
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"""
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false_positives = ["Legitimate scheduled tasks may be created during installation of new software."]
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Scheduled Task Created by a Windows Script"
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note = """## Triage and analysis
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Decode the base64 encoded Tasks Actions registry value to investigate the task's configured action."""
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risk_score = 47
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rule_id = "689b9d57-e4d5-4357-ad17-9c334609d79a"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence"]
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type = "eql"
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query = '''
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sequence by host.id with maxspan = 30s
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[any where (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
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(dll.name : "taskschd.dll" or file.name : "taskschd.dll") and
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process.name : ("cscript.exe", "wscript.exe", "powershell.exe", "pwsh.exe", "powershell_ise.exe")]
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[registry where registry.path : "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Schedule\\TaskCache\\Tasks\\*\\Actions"]
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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 = "T1053"
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name = "Scheduled Task/Job"
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reference = "https://attack.mitre.org/techniques/T1053/"
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[[rule.threat.technique.subtechnique]]
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id = "T1053.005"
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name = "Scheduled Task"
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reference = "https://attack.mitre.org/techniques/T1053/005/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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