ET RETIRED Bitter APT CHM Activity (GET) M3

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php/?h="; offset:10; depth:18; fast_pattern;
content:"|2a|"; distance:0;
http.user_agent;
content:"Windows Installer"; bsize:17;
Raw source ET RETIRED Bitter APT CHM Activity (GET) M3 · 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 RETIRED Bitter APT CHM Activity (GET) M3";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php/?h="; offset:10; depth:18; fast_pattern;
    content:"|2a|"; distance:0;
    http.user_agent;
    content:"Windows Installer"; bsize:17;
    reference:md5,1fa66d93db415a90e1ba6b09a53cc694;
    classtype:trojan-activity;
    sid:2041670; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_12_02, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_23, reviewed_at 2024_09_23;
)

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