alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Unknown Stealer CnC Exfil via Telegram M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"caption|3d 0a 2a 2a 2a 20|"; http.host; content:"api.telegram.org"; http.request_body; content:"|50 4b|"; startswith; content:"files.zip|50 4b|"; content:"CompleteClose.jpg"; distance:0; fast_pattern; reference:md5,b9ff0b9cfe28765d55ab270dfa99333d; reference:url,twitter.com/suyog41/status/1635640558273146880; classtype:trojan-activity; sid:2044599; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_14, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_15;)