ET MALWARE Suspected Lazarus APT Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
pcre:"/^\/(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
http.host;
content:"www.onlinedocpage.org"; bsize:21; fast_pattern;
http.header_names;
content:!"Referer";
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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected Lazarus APT Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\/(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
    http.host;
    content:"www.onlinedocpage.org"; bsize:21; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,c44d866adf8c6845b7dda742c59c6b59;
    reference:url,twitter.com/ShadowChasing1/status/1448150917912559616;
    classtype:trojan-activity;
    sid:2034187; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_10_14, deployment Perimeter, deployment SSLDecrypt, malware_family Lazarus, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_14;
)

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