ET MALWARE Suspected APT43 BRAVEPRINCE Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri.raw;
content:"/login?url=http|25 33 41 25 32 46 25 32 46|mail.daum.net|25 32 46|"; startswith; fast_pattern;
http.user_agent;
content:"Mozilla/5.0 (Windows NT 5.2|3b 20|rv|3a|12.0) Gecko/20100101 Firefox/12.0"; bsize:65;
http.header_names;
content:!"Referer|0d 0a|";
target:src_ip;
Raw source ET MALWARE Suspected APT43 BRAVEPRINCE 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 APT43 BRAVEPRINCE Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri.raw;
    content:"/login?url=http|25 33 41 25 32 46 25 32 46|mail.daum.net|25 32 46|"; startswith; fast_pattern;
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 5.2|3b 20|rv|3a|12.0) Gecko/20100101 Firefox/12.0"; bsize:65;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,33df74cbb60920d63fe677c6f90b63f9;
    reference:url,mandiant.widen.net/s/zvmfw5fnjs/apt43-report;
    classtype:trojan-activity;
    sid:2044824; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_29, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_29;
    target:src_ip;
)

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