ET MALWARE DarkIRC Bot CnC Domain Lookup

Query · suricata

dns.query;
content:"cnc."; startswith; fast_pattern;
content:".xyz"; endswith; bsize:22;
pcre:"/^cnc\.[a-fA-F0-9]{14}.xyz$/";
Raw source ET MALWARE DarkIRC Bot CnC Domain Lookup · 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 dns $HOME_NET any -> any any (
    msg:"ET MALWARE DarkIRC Bot CnC Domain Lookup";
    dns.query;
    content:"cnc."; startswith; fast_pattern;
    content:".xyz"; endswith; bsize:22;
    pcre:"/^cnc\.[a-fA-F0-9]{14}.xyz$/";
    reference:url,blogs.juniper.net/en-us/threat-research/darkirc-bot-exploits-oracle-weblogic-vulnerability;
    classtype:command-and-control;
    sid:2031260; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_04, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_04;
)

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