alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Pakes2 - EXE Download Request"; flow:established,to_server; urilen:<12; http.protocol; content:"HTTP/1.1"; http.uri; content:".exe"; http.header; content:"User-Agent|3a 20|Mozilla/4.0|0d 0a|Host|3a 20|"; fast_pattern; startswith; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; classtype:trojan-activity; sid:2015547; rev:7; metadata:created_at 2012_07_31, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08;)