alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE CobianRAT Checkin to CnC"; flow:to_server,established; content:"|01 00 00 00 FF FF FF FF 01|"; depth:15; content:"|02|LOGIN|7c 2d 7c|"; within:30; fast_pattern; reference:md5,94911666a61beb59d2988c4fc7003e5a; reference:url,www.zscaler.com/blogs/research/cobian-rat-backdoored-rat; classtype:command-and-control; sid:2024651; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_01, deployment Perimeter, malware_family CobianRAT, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;)