ET RETIRED Confucious APT CnC Checkin

Query · suricata

flow:established,to_server;
content:"XOXO";
content:"XOXO"; distance:0; within:50;
pcre:"/^(?:[A-F0-9]{2}-){5}[A-F0-9]{2}/R";
content:"XOXO|20|Host|20|Name|3a|"; fast_pattern;
Raw source ET RETIRED Confucious APT CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Confucious APT CnC Checkin";
    flow:established,to_server;
    content:"XOXO";
    content:"XOXO"; distance:0; within:50;
    pcre:"/^(?:[A-F0-9]{2}-){5}[A-F0-9]{2}/R";
    content:"XOXO|20|Host|20|Name|3a|"; fast_pattern;
    reference:md5,23537d81e9cd285b41185a0e4c3d37c1;
    classtype:trojan-activity;
    sid:2041928; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_12_06, 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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