ET MALWARE CloudAtlas APT Related Maldoc Activity M2 (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/?php-"; startswith; fast_pattern;
content:"wp-content"; within:15;
pcre:"/^(?:(\/|_))plugins\//R";
content:".css";
pcre:"/^(?:(\/|\?))/R";
http.user_agent;
content:"|3b 20|ms-office|3b 20|";
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE CloudAtlas APT Related Maldoc Activity M2 (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 CloudAtlas APT Related Maldoc Activity M2 (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/?php-"; startswith; fast_pattern;
    content:"wp-content"; within:15;
    pcre:"/^(?:(\/|_))plugins\//R";
    content:".css";
    pcre:"/^(?:(\/|\?))/R";
    http.user_agent;
    content:"|3b 20|ms-office|3b 20|";
    http.header_names;
    content:!"Referer";
    reference:md5,965d5dc42ee1efdcbc52d061624526c7;
    reference:url,www.facct.ru/blog/cloud-atlas;
    classtype:trojan-activity;
    sid:2049797; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_12_20, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_20;
    target:src_ip;
)

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