alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Hiatus RAT CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/master/Api/active?uuid="; startswith; fast_pattern; pcre:"/^[a-f0-9]{12}/R"; http.header_names; content:"|0d 0a|Host|0d 0a|Accept|0d 0a|Content-Type|0d 0a|X_UTIME|0d 0a|X_UUID|0d 0a|X_TOKEN|0d 0a|Content-Length|0d 0a 0d 0a|"; bsize:74; reference:url,blog.lumen.com/new-hiatusrat-router-malware-covertly-spies-on-victims/; classtype:trojan-activity; sid:2044503; rev:2; metadata:affected_product IoT, attack_target Networking_Equipment, created_at 2023_03_07, deployment SSLDecrypt, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30;)