alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED PoisonIvy.Es11 Keepalive to CnC"; flow:established,to_server; content:"|89 e7 52 d4 68 64 a7 73 bd 7e 3f 5c f7 99 3a 2e|"; offset:16; depth:16; dsize:48; reference:md5,4a17e9bd99f496c518ddfaaef93384b0; classtype:command-and-control; sid:2014630; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2012_04_20, deployment Perimeter, former_category MALWARE, malware_family PoisonIvy, confidence Medium, signature_severity Critical, tag PoisonIvy, updated_at 2024_12_05;)