alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FlashBack Mac OSX malware Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"/aaupdate/"; fast_pattern; http.user_agent; bsize:>123; content:!"Mozilla"; within:7; reference:url,blog.intego.com/flashback-mac-trojan-horse-infections-increasing-with-new-variant/; classtype:command-and-control; sid:2014596; rev:7; metadata:created_at 2012_03_01, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)