alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Postal Reciept EXE in Zip"; flow:from_server,established; file_data; content:"PK"; within:2; content:"Postal-Receipt.exe"; nocase; fast_pattern:only; classtype:trojan-activity; sid:2016654; rev:3; metadata:created_at 2013_03_22, signature_severity Unknown, updated_at 2019_09_10;)