alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Xbagger Macro Encrypted DL"; flow:established,to_server; http.uri; content:".jpg?"; fast_pattern; pcre:"/^\/[a-z0-9]+\.jpg\?(?=[a-z0-9]*[A-Z]+[a-z0-9])[A-Za-z0-9]+=\d{1,4}$/"; http.header; content:"Range"; http.user_agent; content:"MSIE 7.0|3b 20|Windows NT"; classtype:trojan-activity; sid:2022500; rev:7; metadata:created_at 2016_02_10, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_06;)