alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Possible Chrome Plugin install"; flow:to_server,established; http.uri; content:"|2f|crx|2f|blobs"; nocase; fast_pattern; http.user_agent; content:"|20|Chrome/"; reference:url,blogs.technet.com/b/mmpc/archive/2013/05/10/browser-extension-hijacks-facebook-profiles.aspx; classtype:bad-unknown; sid:2016847; rev:5; metadata:created_at 2013_05_14, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;)