alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Possible IE 0day CVE-2013-3918 2"; flow:established,from_server; file_data; content:"InformationCardSigninHelper"; nocase; content:".requiredClaims"; nocase; content:".remove("; nocase; content:".add("; nocase; reference:url,www.fireeye.com/blog/technical/cyber-exploits/2013/11/operation-ephemeral-hydra-ie-zero-day-linked-to-deputydog-uses-diskless-method.html; classtype:attempted-user; sid:2017705; rev:4; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2013_11_12, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2022_06_28;)