alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE IXWARE Stealer CnC Activity"; flow:established,to_server; http.request_body; content:"checkAcc="; startswith; http.content_type; bsize:33; content:"application/x-www-form-urlencoded"; http.start; content:"POST /stubCheck HTTP/"; depth:21; fast_pattern; reference:url,twitter.com/James_inthe_box/status/1248010996502769664; classtype:command-and-control; sid:2030098; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_04, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_17;)