ET MALWARE Possible Net Crawler SMB Share Access unicode (Operation Cleaver)

Query · suricata

flow:established,to_server;
content:"|FF|SMB"; offset:4; depth:4;
byte_test:1,!&,0x80,6,relative;
content:"|00|_|00|A|00|u|00|t|00|o|00|S|00|h|00|a|00|r|00|e|00|$"; distance:0;
Raw source ET MALWARE Possible Net Crawler SMB Share Access unicode (Operation Cleaver) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any any -> any [139,445] (
    msg:"ET MALWARE Possible Net Crawler SMB Share Access unicode (Operation Cleaver)";
    flow:established,to_server;
    content:"|FF|SMB"; offset:4; depth:4;
    byte_test:1,!&,0x80,6,relative;
    content:"|00|_|00|A|00|u|00|t|00|o|00|S|00|h|00|a|00|r|00|e|00|$"; distance:0;
    reference:md5,8994e16b14cde144a9cebdff685d8676;
    reference:url,www0.cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf;
    classtype:trojan-activity;
    sid:2019929; rev:1;
    metadata:created_at 2014_12_13, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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