alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Malicious Browser Installer Checkin (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:14; content:"/metrics/geoip"; fast_pattern; http.header; content:"Authorization|3a 20|SIGN|20|"; http.header_names; content:"|0d 0a|Connection|0d 0a|Date|0d 0a|Pragma|0d 0a|Authorization|0d 0a|Host|0d 0a|"; reference:md5,9aabcababd5b677813589f7154302ee0; reference:url,securelist.com/onionpoison-infected-tor-browser-installer-youtube/107627/; classtype:command-and-control; sid:2039096; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_10_05, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03;)