alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W2KM_BARTALEX Downloading Payload"; flow:established,to_server; http.uri; content:"/lns.txt"; fast_pattern; pcre:"/\/lns.txt$/"; http.user_agent; content:"WinHttp.WinHttpRequest"; reference:md5,0ed66982890ec483c3bc6f883e2424fb; classtype:trojan-activity; sid:2021284; rev:5; metadata:created_at 2015_06_17, signature_severity Major, updated_at 2020_10_01;)