alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Remcos RAT Checkin 109"; flow:established,to_server; content:"|5b bc 1f 13 45 60 61 fd 0d 43 7f|"; depth:11; fast_pattern; content:"|3e 41|"; distance:2; within:2; threshold:type limit, seconds 30, count 1, track by_src; reference:url,research.checkpoint.com/operation-tripoli/; classtype:command-and-control; sid:2027660; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_02, 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;)