alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED FakeScan - Payload Download Received"; flow:established,to_client; content:"attachment"; http_header; content:"freescan"; http_header; fast_pattern; file_data; content:"MZ"; within:2; classtype:bad-unknown; sid:2016021; rev:3; metadata:created_at 2012_12_13, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)