alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA450 GRAMDOOR Telegram CnC Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.host; content:"api.telegram.org"; bsize:16; http.uri; content:"/bot2003026094:AAGoitvpcx3SFZ2_6YzIs4La_kyDF1PbXrY/sendMessage?"; fast_pattern; startswith; reference:url,www.mandiant.com/resources/telegram-malware-iranian-espionage; classtype:trojan-activity; sid:2035409; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_03_08, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_08;)