ET EXPLOIT RAR File Directory Traversal Inbound (CVE-2025-6218)

alert tcp any any -> $HOME_NET any (
    msg:"ET EXPLOIT RAR File Directory Traversal Inbound (CVE-2025-6218)";
    flow:established,to_client;
    file.data;
    content:"|52 61 72 21 1a|"; fast_pattern;
    content:"|2e 2e 20|";
    pcre:"/(?:\x2f|\x5c{2})\x2e{2}\s+[\x2e\x2f]\w+/";
    threshold:type limit, seconds 600, count 1, track by_src;
    reference:url,www.welivesecurity.com/en/eset-research/update-winrar-tools-now-romcom-and-others-exploiting-zero-day-vulnerability/;
    reference:cve,2025-6218;
    classtype:bad-unknown;
    sid:2066599; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_06, cve CVE_2025_6218, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Exploit, updated_at 2026_01_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1189, mitre_technique_name Drive_by_Compromise;
    target:dest_ip;
)