alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious Windows Executable WriteProcessMemory"; flow:established,to_client; http.response_body; content:"MZ"; startswith; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; content:"WriteProcessMemory"; nocase; reference:url,sans.org/reading_room/whitepapers/malicious/rss/_33649; reference:url,jessekornblum.livejournal.com/284641.html; reference:url,msdn.microsoft.com/en-us/library/windows/desktop/ms681674%28v=vs.85%29.aspx; classtype:misc-activity; sid:2015588; rev:6; metadata:created_at 2012_08_08, confidence Medium, signature_severity Informational, updated_at 2023_02_14;)