alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT Possible IE iepeers.dll Use-after-free Code Execution Attempt"; flow:established,to_client; content:".addBehavior"; nocase; content:"|23|default|23|userdata"; nocase; within:100; content:"setAttribute"; nocase; distance:0; content:"onclick"; nocase; distance:0; reference:url,www.rec-sec.com/2010/03/10/internet-explorer-iepeers-use-after-free-exploit/; reference:url,tools.cisco.com/security/center/viewAlert.x?alertId=20052; reference:url,www.microsoft.com/technet/security/bulletin/ms10-018.mspx; reference:url,www.kb.cert.org/vuls/id/744549; reference:cve,2010-0806; classtype:attempted-user; sid:2010931; rev:7; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence Low, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;)