alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed StealC_V2 Payload URL (GET)"; flow:established,to_server; urilen:<16; http.method; content:"GET"; http.uri; content:"/modelo/"; startswith; fast_pattern; pcre:"/^[a-zA-Z0-9]{1,4}\x2eexe$/R"; http.header_names; content:!"|0d 0a|referer|0d 0a|"; nocase; http.host; content:!"github.io"; endswith; classtype:trojan-activity; sid:2066308; 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_12_12, deployment Perimeter, deployment SSLDecrypt, malware_family Stealc, confidence Medium, signature_severity Unknown, updated_at 2025_12_12; target:src_ip;)