alert dns $HOME_NET any -> any any (msg:"ET HUNTING Telegram API Domain in DNS Lookup"; dns.query; content:"api.telegram.org"; nocase; bsize:16; classtype:misc-activity; sid:2033966; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_16;)