alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED PoisonIvy Keepalive to CnC (Operation SMN Variant)"; flow:established,to_server; dsize:48; content:"|52 13 34 da 18 3d 2f 45 a2 09 93 52 01 23 51 e3|"; offset:16; depth:16; reference:md5,ca22207c5441a100437b75d7ce0d3fe2; classtype:command-and-control; sid:2019591; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_10_29, deployment Perimeter, malware_family PoisonIvy, confidence Medium, signature_severity Critical, tag PoisonIvy, updated_at 2024_12_05;)