38 lines
1.0 KiB
YAML
38 lines
1.0 KiB
YAML
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title: Suspicious PowerShell Mailbox Export to Share
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ruletype: Sigma
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author: Florian Roth
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date: 2021/08/07
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description: Detects a PowerShell New-MailboxExportRequest that exports a mailbox
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to a local share, as used in ProxyShell exploitations
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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CommandLine: '*New-MailboxExport*'
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SELECTION_3:
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CommandLine: '* -Mailbox *'
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SELECTION_4:
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CommandLine: '* -FilePath \\127.0.0.1\C$*'
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condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
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falsepositives:
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- unknown
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fields:
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- CommandLine
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- ParentCommandLine
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id: 889719ef-dd62-43df-86c3-768fb08dc7c0
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level: critical
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logsource:
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category: process_creation
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product: windows
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references:
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- https://youtu.be/5mqid-7zp8k?t=2481
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- https://blog.orange.tw/2021/08/proxylogon-a-new-attack-surface-on-ms-exchange-part-1.html
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- https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1
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status: experimental
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tags:
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- attack.persistence
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- attack.t1505.003
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- attack.resource_development
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- attack.t1584.006
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