alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET MALWARE Possible Windows executable sent when remote host claims to send a Text File";
flow:established,from_server;
flowbits:isnotset,ET.Adobe.Site.Download;
flowbits:isnotset,ET.ZoneAlarm.Site.Download;
flowbits:isnotset,ET.QuickenUpdater;
flowbits:isnotset,ET.Symantec.Site.Download;
flowbits:isnotset,ET.Maas.Site.Download;
flowbits:isnotset,ET.Mcafee.Site.Download;
http.content_type;
content:"text/plain"; nocase; startswith;
file.data;
content:"MZ"; within:2;
byte_jump:4,58,relative,little;
content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
classtype:trojan-activity;
sid:2062740; rev:25;
metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, updated_at 2025_06_04;
)