ET EXPLOIT Microsoft Exchange - Information Disclosure flowbit set (CVE-2021-33766)

Query · suricata

flow:established,to_server;
http.uri;
content:"/ecp/"; nocase; fast_pattern;
http.cookie;
content:"SecurityToken=";
flowbits:set,ET.proxytoken;

Rule dependencies

Feeds into

Raw source ET EXPLOIT Microsoft Exchange - Information Disclosure flowbit set (CVE-2021-33766) · Suricata
Esc
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 - Information Disclosure flowbit set (CVE-2021-33766)";
    flow:established,to_server;
    http.uri;
    content:"/ecp/"; nocase; fast_pattern;
    http.cookie;
    content:"SecurityToken=";
    flowbits:set,ET.proxytoken;
    reference:cve,2021-33766;
    classtype:attempted-admin;
    sid:2033834; rev:1;
    metadata:attack_target Server, created_at 2021_08_30, cve CVE_2021_33766, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2021_08_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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