alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible MalDoc Retrieving Payload 2021-11-01"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".dat"; endswith; pcre:"/\/(?:[0-9]{2,8}\.)?[0-9]{4,16}\.dat$/U"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.2|3b 20|WOW64|3b 20|Trident/8.0|3b 20|.NET4.0C|3b 20|.NET4.0E|3b 20|.NET|20|CLR|20|2.0.50727|3b 20|.NET|20|CLR|20|3.0.30729|3b 20|.NET|20|CLR|20|3.5.30729|3b 20|InfoPath.3)"; fast_pattern; bsize:162; http.header_names; content:!"Referer"; reference:md5,8eb1525db6bdadce7dae53b15f544bd2; classtype:trojan-activity; sid:2034464; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_01, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09;)