Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Likely Evil EXE with no referer from HFS webserver (used by Unknown EK)"; flow:established,from_server; flowbits:isset,exe.no.referer; http.header; content:"Server|3a 20|HFS"; fast_pattern; file.data; content:"MZ"; within:2; classtype:exploit-kit; sid:2020500; rev:4; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2015_02_23, deployment Perimeter, confidence Medium, signature_severity Major, tag DriveBy, updated_at 2020_05_15;)