alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Proxychecker Lookup"; flow:established,to_server; http.uri; content:"/proxy/proxychecker/"; nocase; fast_pattern; reference:url,www.virustotal.com/en/file/ec19e12e5dafc7aafaa0f582cd714ee5aa3615b89fe2f36f7851d96ec55e3344/analysis; classtype:trojan-activity; sid:2017344; rev:5; metadata:created_at 2013_08_19, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_19;)