alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible malicious Office doc hidden in XML file"; flow:established,to_client; file.data; content:"<?xml"; within:5; content:"<?mso-application progid=|22|Word.Document|22|?>"; nocase; distance:0; content:"macrosPresent=|22|yes|22|"; distance:0; fast_pattern; reference:url,trustwave.com/Resources/SpiderLabs-Blog/Attackers-concealing-malicious-macros-in-XML-files/; classtype:trojan-activity; sid:2020657; rev:3; metadata:created_at 2015_03_10, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_14;)