alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Malicious VBS Related UA"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36/"; fast_pattern; startswith; pcre:"/^[A-Za-z0-9]{17}$/R"; reference:md5,2a90a42a4f379fb4a28bb32a96f8fc0f; classtype:trojan-activity; sid:2039832; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_11_23, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_23;)