ET JA3 Hash - Possible Cobalt Strike Server

Query · suricata

flowbits:isset,ET.cobaltstrike.ja3;
ja3s.hash;
content:"aa29d305dff6e6ac9cd244a62c6ad0c2";

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:"aa29d305dff6e6ac9cd244a62c6ad0c2";
    reference:url,thedfirreport.com/2021/07/19/icedid-and-cobalt-strike-vs-antivirus/;
    classtype:bad-unknown;
    sid:2033395; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_07_23, deployment Perimeter, malware_family Cobalt_Strike, confidence Low, signature_severity Major, updated_at 2021_07_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.