alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible Backdoor.Unrecom Download"; flow:established,from_server; flowbits:isset,ET.http.javaclient; content:"Unrecom"; nocase; pcre:"/^[a-z0-9_-]*?\.class/Rsi"; reference:url,www.symantec.com/security_response/writeup.jsp?docid=2013-070113-1904-99&tabid=3; reference:url,www.crowdstrike.com/blog/adwind-rat-rebranding/index.html; classtype:trojan-activity; sid:2018466; rev:6; metadata:created_at 2014_05_13, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)