alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JavaRAT CnC Checkin"; flow:established,to_server; dsize:<150; content:"aut_sep_"; depth:8; fast_pattern; content:"_sep_"; distance:0; content:"_packet_"; endswith; reference:md5,9a33176dd80de6f49099a148a2df3491; classtype:command-and-control; sid:2026581; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_07, deployment Perimeter, deprecation_reason Age, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_02_16, reviewed_at 2024_02_16;)