alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BunnyLoader 3.0 Initial Checkin"; flow:established,to_server; flowbits:set,ET.BunnyLoaderv3.Checkin; http.method; content:"GET"; http.uri; pcre:"/^\/[A-Za-z0-9]{12,14}/"; content:"/gate.php?ipaddress|3d|"; fast_pattern; content:"hostname|3d|"; content:"version|3d|"; content:"system|3d|"; content:"privileges|3d|"; content:"arch|3d|"; content:"antivirus|3d|"; content:"key|3d|"; content:"enc_key|3d|"; reference:url,twitter.com/ViriBack/status/1757953408747569644; reference:md5,194118c43c65faad06bf5ff6cd9b52a2; classtype:trojan-activity; sid:2050885; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2024_02_15, deployment Perimeter, malware_family BunnyLoader, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_02_15, reviewed_at 2025_07_14; target:src_ip;)