Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ArigonStealer CnC Exfil via Telegram (POST)"; flow:established,to_server; http.method; content:"POST"; http.host; content:"api.telegram.org"; http.uri; content:"|2f|bot"; startswith; content:"|2f|sendDocument"; endswith; http.user_agent; content:"Stealer"; http.request_body; content:"filename|3d 22|stolen|5f|data|2e|zip|22|"; fast_pattern; reference:md5,a96c054aec2582369e8cae63e50de2f2; classtype:command-and-control; sid:2065780; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_14, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)