ET MALWARE Nazar Implant - Sending Basic System Info to CnC

Query · suricata

flow:established,to_server;
dsize:<200;
content:"100|3b|"; startswith; fast_pattern;
content:"|3b|"; distance:0;
content:"|3b 00 00 00 00|"; endswith;
Raw source ET MALWARE Nazar Implant - Sending Basic System Info to CnC · 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 4000 (
    msg:"ET MALWARE Nazar Implant - Sending Basic System Info to CnC";
    flow:established,to_server;
    dsize:<200;
    content:"100|3b|"; startswith; fast_pattern;
    content:"|3b|"; distance:0;
    content:"|3b 00 00 00 00|"; endswith;
    reference:url,research.checkpoint.com/2020/nazar-spirits-of-the-past/;
    classtype:command-and-control;
    sid:2030105; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_05_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag NazarAPT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_05;
)

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