ET MALWARE Koadic RC4 Encrypted Payload Inbound M2

Query · suricata

flow:established,to_client;
http.response_body;
content:"|f9 0d a6 e9 6a 23 a6 ce 25 e9 89 7a 26 ab e4 1f cf 16 49 e2 b8 36 bb 65 b1 3b a9 40|"; startswith; fast_pattern;
Raw source ET MALWARE Koadic RC4 Encrypted Payload Inbound M2 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Koadic RC4 Encrypted Payload Inbound M2";
    flow:established,to_client;
    http.response_body;
    content:"|f9 0d a6 e9 6a 23 a6 ce 25 e9 89 7a 26 ab e4 1f cf 16 49 e2 b8 36 bb 65 b1 3b a9 40|"; startswith; fast_pattern;
    reference:md5,2b1aadc3c4eebdd8b4bbd4cbb1fb2468;
    classtype:trojan-activity;
    sid:2054104; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_27, deployment Perimeter, malware_family Koadic, confidence High, signature_severity Critical, updated_at 2024_06_27;
)

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