alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ChromeLoader Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/redsync"; startswith; fast_pattern; http.header_names; content:!"Referer"; content:"|0d 0a|dd|0d 0a|"; reference:url,unit42.paloaltonetworks.com/chromeloader-malware/; classtype:trojan-activity; sid:2037793; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_07_20, deployment Perimeter, deployment SSLDecrypt, malware_family ChromeLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_20;)