22 lines
724 B
Text
22 lines
724 B
Text
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rule LOG_EXPL_ProxyToken_Exploitation_Aug21_1 {
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meta:
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description = "Detects ProxyToken CVE-2021-33766 exploitation attempts on an unpatched system"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://www.zerodayinitiative.com/blog/2021/8/30/proxytoken-an-authentication-bypass-in-microsoft-exchange-server"
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date = "2021-08-30"
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score = 75
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id = "f4840140-6d31-52f9-b1a0-2acdd4b955cd"
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strings:
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$ss0 = "POST " ascii
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$ss1 = " 500 0 0"
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$sa1 = "/ecp/" ascii
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$sa2 = "/RulesEditor/InboxRules.svc/NewObject" ascii
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$sb1 = "/ecp/" ascii
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$sb2 = "SecurityToken=" ascii
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condition:
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all of ($ss*) and ( all of ($sa*) or all of ($sb*) )
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}
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