alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Latrodectus Domain (popfealt .one in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".popfealt.one"; endswith; fast_pattern; reference:url,github.com/PaloAltoNetworks/Unit42-timely-threat-intel/blob/main/2024-03-07-IOCs-for-Latrodectus-and-Lumma-Stealer.txt; classtype:trojan-activity; sid:2051601; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_03_11, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)