alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Excel with Embedded .emf object downloaded"; flow:established,to_client; file_data; content:"|0D 0A 0D 0A D0 CF 11 E0 A1 B1 1A E1|"; content:"| 50 4B 03 04 |"; content:"|2F 6D 65 64 69 61 2F 69 6D 61 67 65 |"; within:64; content:"| 2E 65 6D 66 |"; within:15; classtype:bad-unknown; sid:2012504; rev:8; metadata:created_at 2011_03_15, confidence High, signature_severity Major, updated_at 2019_07_26;)