alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Possible FFSniff Inject Observed"; flow:established,from_server; http.stat_code; content:"200"; file.data; content:".type|20|==|20 22|password|22 29|"; nocase; content:"=|20 22|Subject|3a 20 22 20|+|20|"; distance:0; nocase; content:"|20 22 5c|r|5c|n|5c|r|5c|n|22 20|+|20|window.top.content.document.location|20|"; within:150; nocase; fast_pattern; reference:url,www.symantec.com/content/dam/symantec/docs/security-center/white-papers/istr-formjacking-deep-dive-en.pdf; classtype:trojan-activity; sid:2027814; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_08_07, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag CardSkimmer, updated_at 2020_11_18;)