ET MALWARE NanoCore RAT Keepalive 3

Query · suricata

flow:established,to_server;
dsize:68;
content:"|40 00 00 00|"; depth:4;
content:!"|00 00 00 00|"; within:4;
threshold:type both, track by_src, count 10, seconds 120;
flowbits:set,ET.NanoCore;
flowbits:noalert;

Rule dependencies

Feeds into

Raw source ET MALWARE NanoCore RAT Keepalive 3 · 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 [1024:] (
    msg:"ET MALWARE NanoCore RAT Keepalive 3";
    flow:established,to_server;
    dsize:68;
    content:"|40 00 00 00|"; depth:4;
    content:!"|00 00 00 00|"; within:4;
    threshold:type both, track by_src, count 10, seconds 120;
    flowbits:set,ET.NanoCore;
    flowbits:noalert;
    reference:md5,bf994dce3712fb66afa4a2ce5b3ceee4;
    reference:url,medium.com/@the_abjuri5t/nanocore-rat-hunting-guide-cb185473c1e0;
    classtype:trojan-activity;
    sid:2046912; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2015_04_04, deployment Perimeter, malware_family NanoCore, performance_impact Moderate, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_26, former_sid 2810452;
)

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