alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SideCopy APT Related Activity (GET)"; flow:established,to_server; http.request_line; content:"GET /ab.vbs HTTP/1.1"; fast_pattern; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.user_agent; content:"powershell/"; nocase; http.header_names; content:!"Referer"; reference:url,twitter.com/h2jazi/status/1469399194435735553; reference:md5,64fff1f62c8771e2f558e5cb8694326f; classtype:trojan-activity; sid:2034680; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_12_13, deployment Perimeter, malware_family SideCopy, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_13;)