alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE OrbitalBeam CnC Token Response"; flow:established,to_client; flowbits:isset,ET.OrbitalBeamToken; http.connection; bsize:5; content:"close"; http.content_type; bsize:10; content:"text/plain"; http.response_body; bsize:>1000; content:"Token|3a 20|"; startswith; fast_pattern; pcre:"/^(?:[a-zA-Z0-9\x2f\x2b]{100,})/R"; threshold:type limit,track by_src,count 1,seconds 300; classtype:trojan-activity; sid:2050009; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_01_11, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_15;)