ET MALWARE W32/LockscreenBEI.Scareware Cnc Beacon

Query · suricata

flow:established,to_server;
urilen:18;
http.method;
content:"GET";
http.uri;
content:"/reboot/index.html"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE W32/LockscreenBEI.Scareware Cnc Beacon · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/LockscreenBEI.Scareware Cnc Beacon";
    flow:established,to_server;
    urilen:18;
    http.method;
    content:"GET";
    http.uri;
    content:"/reboot/index.html"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,04948b6045730d4ec626f79504c7f9ad;
    reference:md5,9fff65c23fe403d25c08a5cdd3dc775d;
    classtype:command-and-control;
    sid:2018023; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2014_01_28, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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