alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Possible PurpleFox EK Framework Payload"; flow:established,to_client; content:"|0d 0a 0d 0a 20 28 20 27|"; fast_pattern; http.stat_code; content:"200"; http.content_type; content:"image/jpeg"; depth:10; endswith; http.content_len; byte_test:0,>,100000,0,string,dec; file.data; content:"|20 28 20 27|"; depth:4; pcre:"/^[0-9_,{AbZwP&-]{2000}/R"; classtype:exploit-kit; sid:2028981; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_21;)