ET JA3 Hash - Possible Cobalt Strike Server

Query · suricata

flowbits:isset,ET.cobaltstrike.ja3;
ja3s.hash;
content:"eb1d94daa7e0344597e756a1fb6e7054";

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 JA3 Hash - Possible Cobalt Strike Server · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET JA3 Hash - Possible Cobalt Strike Server";
    flowbits:isset,ET.cobaltstrike.ja3;
    ja3s.hash;
    content:"eb1d94daa7e0344597e756a1fb6e7054";
    reference:url,thedfirreport.com/2021/06/20/from-word-to-lateral-movement-in-1-hour/;
    classtype:bad-unknown;
    sid:2033157; rev:1;
    metadata:created_at 2021_06_22, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_22;
)

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