Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MICROPSIA Sending JPG Screenshot to CnC with .his Extension"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"compatible|3b 20|Googlebot|2f|"; http.request_body; content:"name=|22|kerna|22 3b 20|filename"; fast_pattern; content:".his|22 0d 0a|"; within:20; content:"|0d 0a 0d 0a ff d8 ff|"; distance:0; content:"JFIF"; within:15; http.accept_enc; content:"UTF8"; depth:4; endswith; http.content_type; content:"multipart|2f|form-data|3b 20|boundary|3d 2d 2d 2d 2d 2d 2d 2d|Embt-Boundary"; reference:md5,6eff53e85a9ce9f1d99c812270093581; reference:url,twitter.com/ClearskySec/status/1054722167433297920; classtype:command-and-control; sid:2026550; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_24, deployment Perimeter, malware_family MICROPSIA, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_11_19;)