ET WEB_SERVER Generic Webshell Password Prompt Accessed on Internal Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"<pre align=center><form method=post>Password: <input type='password' name='pass'><input type='submit' value='>>'></form></pre>"; fast_pattern;
Raw source ET WEB_SERVER Generic Webshell Password Prompt Accessed on Internal 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 $HTTP_SERVERS any -> $EXTERNAL_NET any (
    msg:"ET WEB_SERVER Generic Webshell Password Prompt Accessed on Internal Compromised Server";
    flow:established,to_client;
    file.data;
    content:"<pre align=center><form method=post>Password: <input type='password' name='pass'><input type='submit' value='>>'></form></pre>"; fast_pattern;
    classtype:web-application-attack;
    sid:2030325; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_06_12, deployment Perimeter, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_12;
)

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