alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE PE EXE or DLL Windows file download Text"; flow:established,from_server; file_data; content:"4D5A"; distance:0; byte_jump:8,114,relative,multiplier 2,little,string,hex; content:"50450000"; distance:-126; within:8; classtype:trojan-activity; sid:2021774; rev:2; metadata:created_at 2015_09_15, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)