alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Linux DarkRadiation Ransomware Activity (wget)"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:21; content:"/api/supermicro_cr.gz"; fast_pattern; http.user_agent; content:"Wget/"; startswith; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; reference:url,www.trendmicro.com/en_us/research/21/f/bash-ransomware-darkradiation-targets-red-hat--and-debian-based-linux-distributions.html; classtype:trojan-activity; sid:2033159; rev:2; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_06_22, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)