alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Lemon_Duck Powershell - Install Tracking"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".json?V="; fast_pattern; content:"&ID="; distance:0; content:"&GUID="; distance:0; content:"&MAC="; distance:0; content:"&retry="; distance:0; content:"&pc1="; distance:0; http.header_names; content:!"Referer"; reference:url,news.sophos.com/en-us/2019/10/01/lemon_duck-powershell-malware-cryptojacks-enterprise-networks/; classtype:command-and-control; sid:2029013; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_11_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_04_09;)