ET MALWARE Lazarus APT Related Loader Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/fontsupdate?_sid="; startswith; fast_pattern;
content:"&_ts="; distance:0;
content:"&_agent="; distance:0;
http.user_agent;
content:"WinInetGet/0.1"; bsize:14;
target:src_ip;
Raw source ET MALWARE Lazarus APT Related Loader Activity (GET) · Suricata
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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 Lazarus APT Related Loader Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/fontsupdate?_sid="; startswith; fast_pattern;
    content:"&_ts="; distance:0;
    content:"&_agent="; distance:0;
    http.user_agent;
    content:"WinInetGet/0.1"; bsize:14;
    reference:md5,a966668feca72d8dddf3c737d4908a29;
    reference:url,media.kasperskycontenthub.com/wp-content/uploads/sites/43/2023/10/18092216/Updated-MATA-attacks-Eastern-Europe_full-report_ENG.pdf;
    classtype:trojan-activity;
    sid:2049691; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_12_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_14;
    target:src_ip;
)

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