ET MALWARE Linux/Moose NAT Traversal CnC Beacon - Multiple Tunnel

Query · suricata

flow:established,from_server;
dsize:8;
content:"|17 00|"; depth:2;
content:!"|04 00|"; within:2;
content:!"|00 00|"; within:2;
content:!"|00|"; distance:2; within:1;
content:!"|00|"; distance:5; within:1;
flowbits:isset,ET.Linux.Moose;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE Linux/Moose NAT Traversal CnC Beacon - Multiple Tunnel · Suricata
Esc
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 Linux/Moose NAT Traversal CnC Beacon - Multiple Tunnel";
    flow:established,from_server;
    dsize:8;
    content:"|17 00|"; depth:2;
    content:!"|04 00|"; within:2;
    content:!"|00 00|"; within:2;
    content:!"|00|"; distance:2; within:1;
    content:!"|00|"; distance:5; within:1;
    flowbits:isset,ET.Linux.Moose;
    reference:url,welivesecurity.com/wp-content/uploads/2015/05/Dissecting-LinuxMoose.pdf;
    classtype:command-and-control;
    sid:2021152; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2015_05_26, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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