ET MALWARE Possible DACLS RAT CnC (Log Check)

Query · suricata

flow:established,to_server;
content:"|0d 0a 0d 0a|log=check"; fast_pattern;
isdataat:!1,relative;
http.method;
content:"POST";
http.content_len;
content:"9"; bsize:1;
http.protocol;
content:"HTTP/1.0";
http.user_agent;
content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64)"; depth:41;
Raw source ET MALWARE Possible DACLS RAT CnC (Log Check) · 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 Possible DACLS RAT CnC (Log Check)";
    flow:established,to_server;
    content:"|0d 0a 0d 0a|log=check"; fast_pattern;
    isdataat:!1,relative;
    http.method;
    content:"POST";
    http.content_len;
    content:"9"; bsize:1;
    http.protocol;
    content:"HTTP/1.0";
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64)"; depth:41;
    reference:url,blog.netlab.360.com/dacls-the-dual-platform-rat-en/;
    classtype:command-and-control;
    sid:2029856; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_04_10, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_10;
)

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