alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Xbagger Macro Encrypted DL Jun 13 2016"; flow:established,to_server; http.uri; content:".jpg?"; fast_pattern; pcre:"/^\/[a-z0-9_-]+\.jpg\?[A-Za-z0-9]{2,10}=\d{1,4}$/"; http.user_agent; content:"MSIE 7.0|3b 20|Windows NT"; http.header; content:"Range"; http.header_names; content:!"Referer|0d 0a|"; classtype:trojan-activity; sid:2022895; rev:5; metadata:created_at 2016_06_14, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22;)