alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Malicious Second Stage Payload Inbound 2021-02-19"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/bestof/"; content:".exe"; within:20; endswith; http.user_agent; bsize:10; content:"AutoHotkey"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,2184931b6412cc900837890a6c5685f6; classtype:trojan-activity; sid:2033044; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_02_19, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12, reviewed_at 2024_03_05;)