alert tcp $HOME_NET any -> $EXTERNAL_NET 80 (msg:"ET MALWARE Win64/Spy.Agent.EU CnC Checkin"; flow:established,to_server; content:"|2e 0f 00 00 71 00 6c 00 61 00 69 00 6e 00 31 00 36 00 35 00 33 00 00 00 03 00|"; startswith; fast_pattern; content:"|0a 00 fb 7c df 7e 3a 00 57 00 69 00 6e 00|"; distance:0; reference:md5,91f0f738f672b15846db76174df88bac; classtype:command-and-control; sid:2038796; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_09, deployment Perimeter, malware_family Win64_Spy_Agent_EU, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_09;)