alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Caypnamer.A RAT CnC Keepalive"; dsize:15; flow:established,to_server; content:"|60 55 4a 3f 34 29 0f 00 00 00 ff 0e 19 24 2f|"; fast_pattern; reference:md5,8a295c02f1ed045a371f5ed945fcfa19; classtype:trojan-activity; sid:2038663; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_08_29, deployment Perimeter, malware_family Win32_Caypnamer_A, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_30;)