alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Arechclient2 Backdoor/SecTopRAT CnC Init"; flow:established,from_server; dsize:<150; content:"|7b 22 54 79 70 65 22 3a 22 45 6e 63 72 79 70 74 69 6f 6e 53 74 61 74 75 73 22 2c 22 53 74 61 74 75 73 22 3a|"; fast_pattern; depth:80; content:"|7d|"; endswith; reference:md5,4ccba79d95dfd7d87b43643058e1cdd0; classtype:command-and-control; sid:2029217; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_02, deployment Perimeter, malware_family Arechclient2, confidence High, signature_severity Major, updated_at 2022_03_24, reviewed_at 2024_05_06; target:dest_ip;)