Florian Roth
31 lines
1.1 KiB
YAML
31 lines
1.1 KiB
YAML
title: Exchange ProxyShell Pattern
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id: 23eee45e-933b-49f9-ae1b-df706d2d52ef
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status: experimental
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description: Detects URP patterns that could be found in ProxyShell exloitation attempts 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
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date: 2020/08/07
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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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selection1:
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c-uri|contains|all:
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- '/autodiscover/autodiscover.json?'
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- '/powershell'
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selection2:
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c-uri|contains:
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# since we don't know how it will appear in the log files, we'll just use all versions
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- 'autodiscover.json?@'
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- 'autodiscover.json%3f@'
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- '%3f@foo.com'
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- 'Email=autodiscover/autodiscover.json'
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- 'json?@foo.com'
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condition: 1 of them
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falsepositives:
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- Unknown
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level: high |