ET MALWARE KilerRAT CnC - Remote Shell

Query · suricata

flow:from_server,established;
content:"rs|7c 4b 69 6c 65 72 7c|"; fast_pattern;
pcre:"/\x7c(?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9/+]{2}==|[A-Za-z0-9/+]{3}=|[A-Za-z0-9/+]{4})$/";
Raw source ET MALWARE KilerRAT CnC - Remote Shell · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE KilerRAT CnC - Remote Shell";
    flow:from_server,established;
    content:"rs|7c 4b 69 6c 65 72 7c|"; fast_pattern;
    pcre:"/\x7c(?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9/+]{2}==|[A-Za-z0-9/+]{3}=|[A-Za-z0-9/+]{4})$/";
    reference:md5,51409b4216065c530a94cd7a5687c0d6;
    reference:url,alienvault.com/open-threat-exchange/blog/kilerrat-taking-over-where-njrat-remote-access-trojan-left-off;
    classtype:command-and-control;
    sid:2022068; rev:3;
    metadata:created_at 2015_11_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;
)

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