alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Vulturi CnC Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/fetch_options?username="; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22; reference:md5,e260f62d42072853e8db940a53c97bc1; reference:url,hatching.io/blog/tt-2022-07-21/#vulturi; classtype:trojan-activity; sid:2042973; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_18, deployment Perimeter, deployment SSLDecrypt, malware_family Vulturi, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_20, former_sid 2850868;)