alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Observed Gigabud Domain (blsdk5 .cc in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".blsdk5.cc"; endswith; fast_pattern; reference:url,www.group-ib.com/blog/goldfactory-ios-trojan/; classtype:trojan-activity; sid:2050939; rev:1; metadata:affected_product Android, affected_product iOS, attack_target Mobile_Client, created_at 2024_02_16, deployment Perimeter, malware_family Gigabud, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_16;)