ET MALWARE ArcDoor Intial Checkin

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.header;
content:"Content-Length|3a 20|28|0d 0a|"; fast_pattern;
http.request_body;
pcre:"/^[a-z0-9]{11}=\d{16}$/";
http.header_names;
content:!"Accept";
Raw source ET MALWARE ArcDoor Intial Checkin · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE ArcDoor Intial Checkin";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.header;
    content:"Content-Length|3a 20|28|0d 0a|"; fast_pattern;
    http.request_body;
    pcre:"/^[a-z0-9]{11}=\d{16}$/";
    http.header_names;
    content:!"Accept";
    reference:md5,71bae4762a6d2c446584f1ae991a8fbe;
    classtype:command-and-control;
    sid:2020345; rev:5;
    metadata:created_at 2015_02_03, signature_severity Major, updated_at 2020_10_28;
)

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