alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Locky VB/JS Loader Download Sep 08 2017"; flow:established,from_server; http.header_names; content:!"Cookie|0d 0a|"; file.data; content:"|3c 64 69 76 20 73 74 79 6c 65 3d 22 62 61 63 6b 67 72 6f 75 6e 64 3a 23 65 65 65 3b 62 6f 72 64 65 72 3a 31 70 78 20 73 6f 6c 69 64 20 23 63 63 63 3b 70 61 64 64 69 6e 67 3a 35 70 78 20 31 30 70 78 3b 22 3e 59 6f 75 72|"; nocase; within:100; fast_pattern; pcre:"/^[a-z0-9!\x22#$%&'()*+,.\/\x3a\x3b<=>?@\[\] ^_`{|}~\s-]+?downloading\.?\s*Please wait\x2e*<\/div\>\s*<iframe src\s*=\s*[\x22\x27]http\:\/\/[^\x22\x27]+\.php[\x22\x27]\s*style\s*=\s*[\x22\x27]display\x3a\s*none\x3b\s*[\x22\x27]>\s*<\/iframe\>\s*$/Rsi"; classtype:trojan-activity; sid:2024678; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2017_09_08, deployment Perimeter, malware_family Locky, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_11_05;)