ET EXPLOIT HTTP POST Request With ysoserial In Request Body (CommonsCollections6) M1

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT HTTP POST Request With ysoserial In Request Body (CommonsCollections6) M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"//68AMYDAAAFAHMAcgAAABEAagBhAHYAYQAuAHUAdABpAGwALgBIAGEAcwBoAFMAZQB0AFElRADgAPIA+wBVJVYlNAADAAA"; fast_pattern;
    classtype:attempted-admin;
    sid:2033560; rev:1;
    metadata:attack_target Server, created_at 2021_07_28, deployment Perimeter, deployment Internal, malware_family ysoserial, confidence High, signature_severity Major, tag Exploit, tag possible_exploitation, updated_at 2021_07_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)