ET MALWARE GET Request to steamcommunity .com With Minimal Headers - Common With InfoStealers

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE GET Request to steamcommunity .com With Minimal Headers - Common With InfoStealers";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.header_names; bsize:<20;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    content:!"|0d 0a|accept|0d 0a|"; nocase;
    content:!"|0d 0a|user-agent|0d 0a|"; nocase;
    http.host;
    content:"steamcommunity.com"; endswith; fast_pattern;
    threshold:type limit,count 1,seconds 300,track by_src;
    classtype:trojan-activity;
    sid:2064211; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_08_28, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_02, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:src_ip;
)