ET MALWARE Suspected Lazarus APT Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?";
pcre:"/^[A-F0-9]{32}\x3d(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; startswith; fast_pattern;
target:src_ip;
Raw source ET MALWARE Suspected Lazarus APT Related Activity (GET) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected Lazarus APT Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?";
    pcre:"/^[A-F0-9]{32}\x3d(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; startswith; fast_pattern;
    reference:md5,3bce9bd375b4360a187623d30a152d06;
    reference:url,twitter.com/jaydinbas/status/1620386706657796096;
    classtype:trojan-activity;
    sid:2044044; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_01_31, deployment Perimeter, deployment SSLDecrypt, malware_family Lazarus, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_31;
    target:src_ip;
)

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