ET EXPLOIT [CISA AA21-336A] Zoho ManageEngine ServiceDesk Possible Exploitation Activity (CVE-2021-44077)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/RestAPI/ImportTechnicians"; fast_pattern;
http.request_body;
content:"filename=|22|msiexec.exe|22|";
Raw source ET EXPLOIT [CISA AA21-336A] Zoho ManageEngine ServiceDesk Possible Exploitation Activity (CVE-2021-44077) · 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 [CISA AA21-336A] Zoho ManageEngine ServiceDesk Possible Exploitation Activity (CVE-2021-44077)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/RestAPI/ImportTechnicians"; fast_pattern;
    http.request_body;
    content:"filename=|22|msiexec.exe|22|";
    reference:url,us-cert.cisa.gov/ncas/alerts/aa21-336a;
    reference:cve,2021-44077;
    reference:url,attackerkb.com/topics/qv2aD8YfMN/cve-2021-44077/rapid7-analysis;
    classtype:attempted-admin;
    sid:2034577; rev:2;
    metadata:attack_target Server, created_at 2021_12_03, cve CVE_2021_44077, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag possible_exploitation, tag CISA_KEV, updated_at 2021_12_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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