alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Linux DarkRadiation Ransomware Telegram Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/sendMessage?chat_id="; distance:0; fast_pattern; content:"&"; endswith; http.user_agent; content:"curl/"; startswith; http.request_body; content:"text="; startswith; threshold:type limit, count 1, seconds 120, track by_src; reference:md5,ae6eeaa09f5fa4c937928430c397b1ff; 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:2044618; rev:1; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2023_03_14, deployment Perimeter, performance_impact Low, confidence Low, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)