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31 lines
1017 B
YAML
31 lines
1017 B
YAML
title: Successful Exchange ProxyShell Attack
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id: 992be1eb-e5da-437e-9a54-6d13b57bb4d8
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status: experimental
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description: Detects URP patterns and status codes that indicate a successful ProxyShell exploitation attack against Exchange servers
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references:
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- https://youtu.be/5mqid-7zp8k?t=2231
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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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author: Florian Roth, Rich Warren
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date: 2021/08/09
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tags:
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- attack.initial_access
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logsource:
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category: webserver
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detection:
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selection_auto:
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c-uri|contains: '/autodiscover.json'
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selection_uri:
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c-uri|contains:
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- '/powershell'
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- '/mapi/nspi'
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- '/EWS'
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- 'X-Rps-CAT'
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selection_success:
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sc-status:
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- 200
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- 301
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condition: selection_auto and selection_uri and selection_success
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falsepositives:
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- Unknown
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level: critical |