alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE JavaRAT Keep-Alive (inbound)"; flow:established,to_client; dsize:11; content:"PNG_packet_"; depth:11; endswith; nocase; reference:md5,9a33176dd80de6f49099a148a2df3491; classtype:trojan-activity; sid:2026582; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_07, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_09_28;)