alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Beapy/Lemon_Duck CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?ID="; content:"&GUID="; distance:0; content:"&MAC="; distance:0; content:"&OS=Win"; distance:0; content:"&BIT="; distance:0; content:"&CARD="; distance:0; fast_pattern; http.header_names; content:!"Referer"; reference:md5,21e49843502325b063b4d52e8c297f79; reference:url,s.tencent.com/research/report/680.html; classtype:command-and-control; sid:2027147; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_04_02, deployment Perimeter, malware_family Win32_Beapy_Lemon_Duck, performance_impact Low, confidence High, signature_severity Major, updated_at 2021_09_08;)