alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET RETIRED ZenRAT CnC OK Response"; flow:established,to_client; flowbits:isset,ET.ZenRATPing; dsize:9; content:"|00 09 00 00 00 00 00 00 00|"; reference:md5,6f809b1c82d9fb6cd277c6b645ecaf84; classtype:trojan-activity; sid:2047755; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2023_08_25, deployment Perimeter, former_category MALWARE, malware_family ZenRAT, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_11_24; target:dest_ip;)