Samirbous
50bb821708
* [Rules Tuning] Add support for Sysmon ImageLoad Events added correct event.category and event.action to rules using library events to support sysmon eventid 7. `event.category == "library"` --> `(event.category == "process" and event.action : "Image loaded*")` `dll.name` --> `file.name` * added Suspicious RDP ActiveX Client Loaded * Delete workspace.xml
53 lines
1.8 KiB
TOML
53 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2020/12/15"
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maturity = "production"
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updated_date = "2022/08/02"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the PowerShell process loading the Task Scheduler COM DLL followed by an outbound RPC network connection
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within a short time period. This may indicate lateral movement or remote discovery via scheduled tasks.
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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 = "Outbound Scheduled Task Activity via PowerShell"
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references = [
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"https://www.volexity.com/blog/2020/12/14/dark-halo-leverages-solarwinds-compromise-to-breach-organizations/",
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]
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risk_score = 47
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rule_id = "5cd55388-a19c-47c7-8ec4-f41656c2fded"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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type = "eql"
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query = '''
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sequence by host.id, process.entity_id with maxspan = 5s
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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 process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe")]
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[network where process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and destination.port == 135 and not destination.address in ("127.0.0.1", "::1")]
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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 = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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