alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OrbitalBeam CnC Activity (Info)"; flow:established,to_server; flowbits:set,ET.OrbitalBeamInfo; urilen:19; http.method; content:"POST"; http.uri; content:"/api/v1/Client/Info"; fast_pattern; http.header_names; content:"X-Request-ID|0d 0a|"; http.header; content:"X-Request-ID|3a 20 0d 0a|"; http.content_len; content:"80"; bsize:2; http.request_body; content:"Info|3a 20|"; startswith; pcre:"/^(?:[a-zA-Z0-9]{74})$/R"; threshold:type limit,track by_src,count 1,seconds 300; classtype:trojan-activity; sid:2050010; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_01_11, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_11;)