ET EXPLOIT Microsoft Exchange RCE Setup Inbound (CVE-2021-28482)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/ews/Exchange.asmx";
http.request_body;
content:"ProposeOptionsMeeting";
content:"&quot|3b|&gt|3b|cmd"; distance:0; fast_pattern;
content:"Value&gt|3b|"; distance:0;
Raw source ET EXPLOIT Microsoft Exchange RCE Setup Inbound (CVE-2021-28482) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Microsoft Exchange RCE Setup Inbound (CVE-2021-28482)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/ews/Exchange.asmx";
    http.request_body;
    content:"ProposeOptionsMeeting";
    content:"&quot|3b|&gt|3b|cmd"; distance:0; fast_pattern;
    content:"Value&gt|3b|"; distance:0;
    reference:cve,2021-28482;
    classtype:attempted-admin;
    sid:2032897; rev:1;
    metadata:affected_product Microsoft_Exchange, attack_target Server, created_at 2021_05_04, cve CVE_2021_28482, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_23;
)

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