alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TellYouThePass Ransomware Checkin Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/jquery.js?v="; startswith; fast_pattern; pcre:"/^[0-9]{2,8}$/R"; http.host.raw; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\x3a80$/"; http.header_names; content:"|0d 0a|Host|0d 0a 0d 0a|"; bsize:10; reference:md5,39a9b92a69a191db0a7e2bc1e78d55e4; reference:md5,c05f8b395c6356bf99aad9c84c13a867; reference:url,www.crowdstrike.com/blog/tellyouthepass-ransomware-analysis-reveals-modern-reinterpretation-using-golang/; reference:md5,b99c4684f7eac1f2af37e6de609e936c; classtype:trojan-activity; sid:2034904; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_01_12, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_23, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)