ET MALWARE W32/Echmark CnC Activity M2

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.uri;
content:".php?u="; fast_pattern;
content:"_"; distance:0;
content:"&i="; distance:0;
http.user_agent;
content:"Microsoft BITS/"; startswith;
Raw source ET MALWARE W32/Echmark CnC Activity M2 · 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 W32/Echmark CnC Activity M2";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.uri;
    content:".php?u="; fast_pattern;
    content:"_"; distance:0;
    content:"&i="; distance:0;
    http.user_agent;
    content:"Microsoft BITS/"; startswith;
    reference:md5,d30484a523fe3d8a883738f4ec06a952;
    reference:md5,f9509755c5781f87788ffdf9efad075d;
    reference:url,twitter.com/reddrip7/status/1366703445990723585?s=21;
    classtype:trojan-activity;
    sid:2031748; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_03_02, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_02;
)

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