alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Possible BadRabbit Driveby Download M1 Oct 24 2017"; flow:established,from_server; file_data; content:"InjectionString"; fast_pattern; content:"setRequestHeader"; nocase; pcre:"/^\s*\(\s*[\x22\x27]Content\-Type/Ri"; content:"onreadystatechange"; nocase; distance:0; content:"readyState"; nocase; distance:0; pcre:"/^\s*==\s*4/Ri"; content:"status"; nocase; distance:0; pcre:"/^\s*==\s*200/Ri"; content:"navigator"; nocase; pcre:"/^\s*\.\s*userAgent/Ri"; content:"document"; nocase; pcre:"/^\s*\.\s*referrer/Ri"; content:"document"; nocase; pcre:"/^\s*\.\s*cookie/Ri"; content:"window"; nocase; pcre:"/^\s*\.\s*location\s*\.\s*hostname/Ri"; content:"document"; nocase; pcre:"/^\s*\.\s*cookie/Ri"; reference:url,www.welivesecurity.com/2017/10/24/bad-rabbit-not-petya-back/; reference:url,www.fireeye.com/blog/threat-research/2017/10/backswing-pulling-a-badrabbit-out-of-a-hat.html; classtype:trojan-activity; sid:2024911; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browsers, attack_target Client_and_Server, created_at 2017_10_24, deployment Perimeter, confidence Medium, signature_severity Major, tag DriveBy, updated_at 2020_08_19;)