alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Likely Malicious wininet UA Downloading EXE"; flow:established,from_server; flowbits:isset,ET.wininet.UA; file_data; content:"MZ"; within:2; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; classtype:trojan-activity; sid:2021312; rev:2; metadata:created_at 2015_06_19, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)