alert http [$HOME_NET,$HTTP_SERVERS] any -> any any (msg:"ET MALWARE Possible STEADYPULSE Webshell Accessed M1"; flow:from_server,established; http.stat_code; content:"200"; file.data; content:"<form action=|22||22| method=|22|GET|22|>"; content:"<input type=|22|text|22| name=|22|cmd|22| "; distance:0; content:"<input type=|22|text|22| name=|22|serverid|22| "; distance:0; fast_pattern; content:"<input type=|22|submit|22| value=|22|Run|22|>"; distance:0; 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:2032801; rev:1; metadata:created_at 2021_04_21, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_21;)