Justin Ibarra
48 lines
1.5 KiB
TOML
48 lines
1.5 KiB
TOML
[metadata]
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creation_date = "2020/12/15"
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maturity = "production"
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updated_date = "2021/03/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the use of the Exchange PowerShell cmdlet, New-MailBoxExportRequest, to export the contents of a primary
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mailbox or archive to a .pst file. Adversaries may target user email to collect sensitive information.
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"""
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false_positives = ["Legitimate exchange system administration activity."]
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from = "now-9m"
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index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Exporting Exchange Mailbox 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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"https://docs.microsoft.com/en-us/powershell/module/exchange/new-mailboxexportrequest?view=exchange-ps",
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]
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risk_score = 47
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rule_id = "6aace640-e631-4870-ba8e-5fdda09325db"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Collection"]
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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 event.type in ("start", "process_started") and
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process.name: ("powershell.exe", "pwsh.exe") and process.args : "New-MailboxExportRequest*"
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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 = "T1114"
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name = "Email Collection"
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reference = "https://attack.mitre.org/techniques/T1114/"
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[rule.threat.tactic]
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id = "TA0009"
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name = "Collection"
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reference = "https://attack.mitre.org/tactics/TA0009/"
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