alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Pteranodon Backdoor Checkin"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"/index.php?comp="; nocase; depth:16; fast_pattern; content:"&id="; nocase; distance:0; content:"_{"; distance:0; reference:md5,58aee970b06e67c9047836710f28e205; reference:url,researchcenter.paloaltonetworks.com/2017/02/unit-42-title-gamaredon-group-toolset-evolution/; classtype:command-and-control; sid:2024022; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_28, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Minor, updated_at 2020_08_04;)