ET EXPLOIT Possible Microsoft Exchange Server OWA GetWacUrl Information Disclosure Attempt (CVE-2020-17143)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/owa/service.svc"; fast_pattern;
http.header;
content:"Action|3a 20|GetWacIframeUrlForOneDrive"; nocase;
content:"|22|EndPointUrl|22 3a 22|"; nocase;
Raw source ET EXPLOIT Possible Microsoft Exchange Server OWA GetWacUrl Information Disclosure Attempt (CVE-2020-17143) · 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 Possible Microsoft Exchange Server OWA GetWacUrl Information Disclosure Attempt (CVE-2020-17143)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/owa/service.svc"; fast_pattern;
    http.header;
    content:"Action|3a 20|GetWacIframeUrlForOneDrive"; nocase;
    content:"|22|EndPointUrl|22 3a 22|"; nocase;
    reference:cve,2020-17143;
    classtype:web-application-attack;
    sid:2035138; rev:2;
    metadata:attack_target Server, created_at 2022_02_08, cve CVE_2020_17143, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2022_02_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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