ET MALWARE Quad7 Botnet - Outbound xlogin Telnet Prompt from Compromised Endpoint

Query · suricata

flow:established,to_client;
content:"xlogin|3a|"; fast_pattern; startswith;
target:src_ip;
Raw source ET MALWARE Quad7 Botnet - Outbound xlogin Telnet Prompt from Compromised Endpoint · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET 7777 -> any any (
    msg:"ET MALWARE Quad7 Botnet - Outbound xlogin Telnet Prompt from Compromised Endpoint";
    flow:established,to_client;
    content:"xlogin|3a|"; fast_pattern; startswith;
    reference:url,gi7w0rm.medium.com/the-curious-case-of-the-7777-botnet-86e3464c3ffd;
    reference:url,blog.sekoia.io/solving-the-7777-botnet-enigma-a-cybersecurity-quest/;
    classtype:command-and-control;
    sid:2055288; rev:1;
    metadata:attack_target Client_and_Server, created_at 2024_08_16, deployment Perimeter, malware_family Quad7_Botnet, malware_family xlogin, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_16;
    target:src_ip;
)

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