ET MALWARE Matanbuchus Loader CnC M4

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.request_body;
content:"=eyIzbTd4Ijoi"; fast_pattern;
pcre:"/(?:IiwiYXU1byI6I|IsImF1NW8iOi|iLCJhdTVvIjoi)/R";
threshold:type limit, track by_src, count 1, seconds 120;
Raw source ET MALWARE Matanbuchus Loader CnC M4 · 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 Matanbuchus Loader CnC M4";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.request_body;
    content:"=eyIzbTd4Ijoi"; fast_pattern;
    pcre:"/(?:IiwiYXU1byI6I|IsImF1NW8iOi|iLCJhdTVvIjoi)/R";
    threshold:type limit, track by_src, count 1, seconds 120;
    reference:url,twitter.com/fr0s7_/status/1458823504925798408;
    classtype:trojan-activity;
    sid:2034469; rev:1;
    metadata:created_at 2021_11_16, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_16;
)

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