Florian Roth
30 lines
1.1 KiB
YAML
30 lines
1.1 KiB
YAML
title: ProxyShell MSExchange MailBox Export Pattern
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id: 516376b4-05cd-4122-bae0-ad7641c38d48
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status: experimental
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description: Detects specific patterns found after a successful ProxyShell exploitation in relation to a Commandlet invokation of New-MailboxExportRequest
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references:
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- https://blog.orange.tw/2021/08/proxylogon-a-new-attack-surface-on-ms-exchange-part-1.html?m=1
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author: Florian Roth, Rich Warren
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date: 2021/08/09
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logsource:
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product: windows
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service: msexchange-management
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detection:
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selection_cmdlet:
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Message|contains|all:
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- 'New-MailboxExportRequest'
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- ' -Mailbox '
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selection_params:
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Message|contains:
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- '-FilePath "\\localhost\C$'
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- '-FilePath "\\127.0.0.1\C$'
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- '.aspx'
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selection_assignment:
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Message|contains|all:
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- 'New-ManagementRoleAssignment'
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- ' -Role "Mailbox Import Export"'
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- ' -User "exchange.admin"'
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condition: selection_cmdlet and selection_params or selection_assignment
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falsepositives:
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- Unlikely
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level: critical |