ET MALWARE Zlader Ransomware Worm Propagating Over SMB v1 ASCII

alert tcp $HOME_NET any -> $HOME_NET [445,139] (
    msg:"ET MALWARE Zlader Ransomware Worm Propagating Over SMB v1 ASCII";
    flow:to_server,established;
    content:"|FF|SMB|A2|"; offset:4; depth:5;
    byte_test:1,!&,0x80,6,relative;
    content:"|24|RECYCLE|2E|BIN|2E 7B|"; nocase; distance:0; fast_pattern;
    pcre:"/\x24RECYCLE\.BIN\.\x7B[0-9A-F]{8}\x2D(?:[0-9A-F]{4}\x2D){3}[0-9A-F]{12}\x7D\x5C\x7B[0-9A-F]{8}\x2D(?:[0-9A-F]{4}\x2D){3}[0-9A-F]{12}\x7D\.(?:scr|pif|cmd)/i";
    threshold:type limit, track by_src, count 10, seconds 60;
    reference:url,www.trendmicro.com/vinfo/us/threat-encyclopedia/malware/worm_zlader.b;
    classtype:trojan-activity;
    sid:2023149; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_09_01, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, updated_at 2019_07_26, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)