ET MALWARE Sharik/Smoke Loader Microsoft Connectivity check

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/kb/"; depth:4; fast_pattern;
pcre:"/^\/kb\/\d{4,8}$/";
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept";
Raw source ET MALWARE Sharik/Smoke Loader Microsoft Connectivity check · Suricata
Esc
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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Sharik/Smoke Loader Microsoft Connectivity check";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/kb/"; depth:4; fast_pattern;
    pcre:"/^\/kb\/\d{4,8}$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept";
    reference:md5,193494912a6f549c0da40bf22c3384ee;
    classtype:trojan-activity;
    sid:2018677; rev:4;
    metadata:created_at 2014_07_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_03;
)

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