alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DeerStealer CnC Activity M2"; flow:established,to_server; http.method; content:"POST"; http.connection; bsize:10; content:"Keep-Alive"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; nocase; http.accept; bsize:3; content:"|2a 2f 2a|"; http.request_body; content:"|03 00 00 00 00 00 00 00 00 00 00 00 fd ff ff ff|"; startswith; fast_pattern; content:"|ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff|"; endswith; reference:url,x.com/anyrun_app/status/1813940716839522596; classtype:trojan-activity; sid:2055004; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_07, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, updated_at 2024_08_07;)