Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Javascript Initiating Remote Server Search with Window's Search-MS URI Handler"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"<script>"; startswith; content:"window.location.href"; distance:0; content:"search-ms:query="; distance:0; content:"&crumb=location:"; distance:0; content:"DavWWWRoot&displayname="; distance:0; fast_pattern; content:"</script>"; endswith; reference:url,trellix.com/en-us/about/newsroom/stories/research/beyond-file-search-a-novel-method.html; classtype:trojan-activity; sid:2047014; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_08_01, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_01;)