ET MALWARE Lyceum Backdoor CnC Activity M1

Query · suricata

flow:established,to_server;
http.uri;
content:"/?proto="; startswith; fast_pattern;
pcre:"/^[0-9]&(?:index|pi|serv)=/R";
Raw source ET MALWARE Lyceum Backdoor CnC Activity M1 · 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 Lyceum Backdoor CnC Activity M1";
    flow:established,to_server;
    http.uri;
    content:"/?proto="; startswith; fast_pattern;
    pcre:"/^[0-9]&(?:index|pi|serv)=/R";
    reference:url,www.accenture.com/us-en/blogs/cyber-defense/iran-based-lyceum-campaigns;
    classtype:command-and-control;
    sid:2034370; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_09, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag LYCEUM, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_09;
)

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