alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Prince Ransomware GET Wallpaper M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/RfsCOES.png"; endswith; fast_pattern; http.host; content:"i.imgur.com"; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:url,research.checkpoint.com/2025/yurei-the-ghost-of-open-source-ransomware/; reference:url,github.com/oakkaya/Prince-Ransomware; classtype:trojan-activity; sid:2064816; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, affected_product Windows_8, affected_product Windows_10, attack_target Client_Endpoint, created_at 2025_09_19, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, tag Go, tag Prince, tag Yurei, updated_at 2025_09_19, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)