alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [PTsecurity] Remcos RAT Checkin 87"; flow:established,to_server; stream_size:server,=, 1; content:"|e9 9d ca 64 2d 84 6e 6b cc 48 16|"; depth:11; reference:md5,872fc6cc16b7ba7e2a74b03927d50e85; classtype:command-and-control; sid:2026862; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_30, deployment Perimeter, malware_family Remcos, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)