alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET EXPLOIT_KIT Coruna Device Fingerprinting M1";
flow:established,to_server;
http.method;
content:"GET";
http.uri; bsize:2;
content:"/e";
http.header;
content:"x-c|3a 20|c="; fast_pattern;
content:"&uuid="; distance:0;
content:"&fid="; distance:0;
reference:url,iverify.io/blog/coruna-inside-the-nation-state-grade-ios-exploit-kit-we-ve-been-tracking;
classtype:trojan-activity;
sid:2068088; rev:1;
metadata:affected_product iOS, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_03_09, deployment Perimeter, confidence Medium, signature_severity Major, tag Exploit_Kit, tag c2, tag Description_Generated_By_Proofpoint_Nexus, tag Coruna, updated_at 2026_03_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)