alert http [$HOME_NET,$HTTP_SERVERS] any -> any any (msg:"ET MALWARE Possible STEADYPULSE Webshell Accessed M2"; flow:from_server,established; http.stat_code; content:"200"; file.data; content:"|0d 0a|Results of|20 27|"; content:"'|27 20|execution|3a 0a 0a|"; distance:1; within:256; fast_pattern; reference:url,www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html; classtype:attempted-user; sid:2032800; rev:1; metadata:created_at 2021_04_21, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_21;)