alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Kargany Loader Obfuscated Payload Download"; flow:established,from_server; content:"Content-Disposition|3a| "; http_header; nocase; content:"windows-update-"; distance:0; http_header; content:".exe"; distance:0; http_header; content:!"|0d 0a|MZ"; classtype:trojan-activity; sid:2014019; rev:4; metadata:created_at 2011_12_10, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)