ET MALWARE njrat ver 0.7d Malware CnC Callback (Remote Desktop)

Query · suricata

flow:from_client,established;
content:"|00|sc~|7c 27 7c 27 7c|"; nocase; fast_pattern;
pcre:"/^\d{1,6}\x00sc\x7e\x7c/i";
Raw source ET MALWARE njrat ver 0.7d Malware CnC Callback (Remote Desktop) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE njrat ver 0.7d Malware CnC Callback (Remote Desktop)";
    flow:from_client,established;
    content:"|00|sc~|7c 27 7c 27 7c|"; nocase; fast_pattern;
    pcre:"/^\d{1,6}\x00sc\x7e\x7c/i";
    reference:md5,a42317b9f9d3df375218e650999d48c4;
    classtype:command-and-control;
    sid:2022060; rev:1;
    metadata:created_at 2015_11_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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