alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Generic Attempted Executable Drop via VBScript"; flow:established,to_client; file.data; content:"<SCRIPT Language=VBScript"; nocase; content:"DropFileName"; nocase; within:100; content:".exe"; within:100; nocase; content:"WriteData =|20 22|4D5A"; nocase; within:100; fast_pattern; classtype:trojan-activity; sid:2031508; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_01_11, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_11;)