alert tcp $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE Possible Upatre SSL Compromised site iclasshd.net"; flow:established,to_client; content:"|55 04 03|"; content:"|0c|iclasshd.net"; distance:1; within:14; nocase; reference:md5,abe131828ce5beae41ef341238016547; classtype:trojan-activity; sid:2018460; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2014_05_09, malware_family Upatre, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Downloader, tag Upatre, updated_at 2019_07_26;)