alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (h55u4u4u5uii5)"; flow:established,to_server; http.user_agent; content:"h55u4u4u5uii5"; bsize:13; reference:url,www.welivesecurity.com/2020/04/28/grandoreiro-how-engorged-can-exe-get/; classtype:trojan-activity; sid:2030058; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_04_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_29;)