ET MALWARE Possible KONNI CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST"; nocase;
http.user_agent; bsize:4;
content:"HTTP"; fast_pattern;
http.host;
content:!".realptt.com";
Raw source ET MALWARE Possible KONNI CnC Activity · 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 Possible KONNI CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase;
    http.user_agent; bsize:4;
    content:"HTTP"; fast_pattern;
    http.host;
    content:!".realptt.com";
    reference:url,us-cert.cisa.gov/ncas/alerts/aa20-227a;
    classtype:targeted-activity;
    sid:2030691; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_08_17, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)

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