alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED ZenRAT Update Command"; flow:established,to_server; dsize:73; content:"|05 49 00 00 00 00 00 00 00|"; startswith; pcre:"/([\x00-\xff]\x00{7}){2}/R"; flowbits:set,ET.ZenRATUpdate; reference:md5,6f809b1c82d9fb6cd277c6b645ecaf84; classtype:trojan-activity; sid:2047761; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2023_08_25, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_02, reviewed_at 2024_10_02; target:src_ip;)