alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Injector.VVP Downloader Activity M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".exe"; endswith; pcre:"/^\/wp\x2dcontent\/[a-z]{3}\/[0-9]{16}\.exe$/U"; http.user_agent; content:"Mozilla/5.0|20 28|Windows NT|3b 20|Windows NT 6.1|3b 20|en-US|29 20|WindowsPowerShell/5.1.14409.1005"; fast_pattern; http.header_names; content:!"Referer"; http.connection; content:"Keep-Alive"; reference:md5,009934cd29110745347705ec4f877b6d; classtype:trojan-activity; sid:2034949; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_01_19, deployment Perimeter, malware_family MSIL_Injector_VVP, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_19, reviewed_at 2024_06_26;)