alert udp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Unknown RAT CnC Checkin"; dsize:14<>17; byte_jump:4,0,little, post_offset -5; isdataat:!2,relative; content:"|00 00 00 00 ca 01|"; offset:8; fast_pattern; threshold:type limit, count 1, seconds 120, track by_src; reference:md5,db9fd417244157770e31fb4b39e0e97a; classtype:trojan-activity; sid:2052876; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2024_05_23, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_05_23;)