alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Maldoc Retrieving Additional Resources (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/Profile.html"; bsize:13; fast_pattern; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.header_names; content:!"Referer"; reference:url,news.sophos.com/en-us/2021/12/21/attackers-test-cab-less-40444-exploit-in-a-dry-run/; reference:md5,eb47824fe3b93f30e6805938814b9cca; classtype:trojan-activity; sid:2034911; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_13, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_13;)