alert tcp $EXTERNAL_NET !$HTTP_PORTS -> $HOME_NET any (msg:"ET MALWARE [PTsecurity] pkt checker 3"; flow:established, to_client; dsize:30<>33; stream_size:server, <,70; stream_size:client, <,610; stream_size:client, >,0; stream_size:server, >,35; flowbits:noalert; flowbits:isset, FB180732_2; flowbits:unset, FB180732_2; flowbits:set, FB180732_3; classtype:trojan-activity; sid:2024697; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_11, deployment Perimeter, malware_family Remcos, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_07_26;)