ET WEB_CLIENT Generic Webshell Password Prompt Accessed on External Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"<form method=post>Password<br><input type=password name=pass style='background-color:whitesmoke|3b|border:1px solid #FFF|3b|outline:none|3b|' required>";
content:"<input type=submit name='watching' value='submit' style='border:none|3b|background-color:#56AD15|3b|color:#fff|3b|cursor:pointer|3b|'></form>"; distance:0; fast_pattern;
Raw source ET WEB_CLIENT Generic Webshell Password Prompt Accessed on External Compromised Server · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_CLIENT Generic Webshell Password Prompt Accessed on External Compromised Server";
    flow:established,to_client;
    file.data;
    content:"<form method=post>Password<br><input type=password name=pass style='background-color:whitesmoke|3b|border:1px solid #FFF|3b|outline:none|3b|' required>";
    content:"<input type=submit name='watching' value='submit' style='border:none|3b|background-color:#56AD15|3b|color:#fff|3b|cursor:pointer|3b|'></form>"; distance:0; fast_pattern;
    classtype:web-application-attack;
    sid:2029900; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_04_14, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_14;
)

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