alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Pakes2 - EXE Download Request"; flow:established,to_server; urilen:<12; content:".exe"; http_uri; http_start; content:"1.1|0d 0a|User-Agent|3a 20|Mozilla/4.0|0d 0a|Host|3a 20|"; fast_pattern; content:"|0d 0a 0d 0a|"; within:19; classtype:trojan-activity; sid:2015547; rev:5; metadata:created_at 2012_07_31, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_03_09;)