alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Netwire RAT Client Check-in (socket created)"; flow:established,to_server; dsize:5; content:"|01 00 00 00 98|"; flowbits:isset,ET.NetwireRAT.Client; reference:md5,b0e58a8f45a3e45fd7ee2b4cc20474b3; classtype:command-and-control; sid:2028918; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_10_29, deployment Perimeter, malware_family Netwire_RAT, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_10_29;)