ET HUNTING Microsoft Sharepoint Deserialization RCE via SPThemes (CVE-2024-38018)

alert http any any -> $HOME_NET any (
    msg:"ET HUNTING Microsoft Sharepoint Deserialization RCE via SPThemes (CVE-2024-38018)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/_vti_bin/webpartpages.asmx"; endswith;
    http.request_body;
    content:"|3c|AttachedPropertiesShared|3e 2f|wE"; fast_pattern;
    reference:url,blog.viettelcybersecurity.com/sharepoint_properties_deser/;
    classtype:attempted-user;
    sid:2064129; rev:1;
    metadata:affected_product Microsoft_Sharepoint, attack_target Server, tls_state TLSDecrypt, created_at 2025_08_22, cve CVE_2024_38018, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2025_08_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)