alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Telegram API Request (GET)"; flow:established,to_server; flowbits:set,ET.generictelegram; http.method; content:"GET"; http.uri; content:"/bot"; startswith; content:"|3a|"; distance:0; http.host; content:"api.telegram.org"; bsize:16; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; content:!"User-Agent|0d 0a|"; classtype:misc-activity; sid:2045615; rev:1; metadata:created_at 2023_05_08, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_08; target:src_ip;)