alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Remcos RAT Checkin 61"; flow:established,to_server; content:"|f3 85 1c e5 6c 10 d9 78 fa 64 de|"; depth:11; fast_pattern; content:"|78 49|"; distance:2; within:2; threshold:type limit, seconds 30, count 1, track by_src; classtype:command-and-control; sid:2026501; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_16, deployment Perimeter, malware_family Remcos, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2020_11_06, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)