alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED possible Sofacy encrypted binary (1)"; flow:established,to_client; file_data; content:"|57 46 e8 67 27 3d 66 1a|"; within:8; flowbits:set,et.exploitkitlanding; reference:url,labsblog.f-secure.com/2015/09/08/sofacy-recycles-carberp-and-metasploit-code/; reference:url,www.isightpartners.com/2015/07/microsoft-office-zero-day-cve-2015-2424-leveraged-by-tsar-team/; classtype:targeted-activity; sid:2021755; rev:3; metadata:created_at 2015_09_09, signature_severity Unknown, updated_at 2019_09_10;)