ET WEB_SPECIFIC_APPS SonicWall SMA Websocket Tunnel Bypass (CVE-2026-15409)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS SonicWall SMA Websocket Tunnel Bypass (CVE-2026-15409)";
    flow:established,to_server;
    http.uri;
    content:"/wsproxy|3f|";
    content:"bmid|3d 2d|3389"; nocase;
    http.user_agent;
    content:"SMA Connect Agent"; fast_pattern;
    reference:url,www.volexity.com/blog/2026/07/17/proxying-to-compromise-sonicwall-secure-mobile-access-0-day-exploitation/;
    reference:cve,2026-15409;
    classtype:web-application-attack;
    sid:2071235; rev:1;
    metadata:affected_product SonicWall, attack_target Server, tls_state TLSDecrypt, created_at 2026_07_21, cve CVE_2026_15409, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)