alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Curl User-Agent Observed to Telegram"; flow:established,to_server; http.user_agent; content:"curl/"; startswith; http.host; content:"api.telegram.org"; fast_pattern; 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:unknown; sid:2044617; rev:1; metadata:created_at 2023_03_14, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14;)