ET MALWARE BazaBackdoor Variant CnC Activity M4

Query · suricata

flow:established,to_server;
urilen:36;
http.method;
content:"POST";
http.uri;
content:!".";
content:!"?";
content:!"=";
content:!"&";
pcre:"/^\/[a-z0-9]{32}\/\d\/$/i";
http.cookie;
content:"group="; depth:6;
isdataat:!2,relative; fast_pattern;
pcre:"/^\d$/R";
Raw source ET MALWARE BazaBackdoor Variant CnC Activity 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE BazaBackdoor Variant CnC Activity M4";
    flow:established,to_server;
    urilen:36;
    http.method;
    content:"POST";
    http.uri;
    content:!".";
    content:!"?";
    content:!"=";
    content:!"&";
    pcre:"/^\/[a-z0-9]{32}\/\d\/$/i";
    http.cookie;
    content:"group="; depth:6;
    isdataat:!2,relative; fast_pattern;
    pcre:"/^\d$/R";
    reference:url,twitter.com/lazyactivist192/status/1364668631460827142;
    reference:md5,8488d9be18308a7f4e83b7c39fc79d17;
    classtype:command-and-control;
    sid:2031673; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_02_25, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_03, reviewed_at 2024_01_02;
)

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