ET MALWARE TINYSHELL impad Variant Command Packet

Query · suricata

dsize:4;
byte_test:1,>=,0x80,0;
byte_test:1,<=,0x88,0;
content:"|e3 c6 b9|";
target:dest_ip;
Raw source ET MALWARE TINYSHELL impad Variant Command Packet · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $EXTERNAL_NET any -> $HOME_NET [33615,33568] (
    msg:"ET MALWARE TINYSHELL impad Variant Command Packet";
    dsize:4;
    byte_test:1,>=,0x80,0;
    byte_test:1,<=,0x88,0;
    content:"|e3 c6 b9|";
    reference:url,cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers;
    reference:url,supportportal.juniper.net/s/article/2025-03-Reference-Advisory-The-RedPenguin-Malware-Incident;
    classtype:command-and-control;
    sid:2060871; rev:1;
    metadata:affected_product JunOS, attack_target Client_Endpoint, created_at 2025_03_14, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2025_03_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:dest_ip;
)

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