ET WEB_SERVER Generic Webshell Password Prompt Accessed on Internal Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"cmd{background-color|3a|";
content:"SCROLLBAR-DARKSHADOW-COLOR|3a|"; distance:0;
content:"<body style=|22|FILTER|3a 20|progid|3a|DXImageTransform.Microsoft.Gradient("; distance:0;
content:"gradientType=0,startColorStr=";
content:"<input name='envlpass' type='password'"; 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:"cmd{background-color|3a|";
    content:"SCROLLBAR-DARKSHADOW-COLOR|3a|"; distance:0;
    content:"<body style=|22|FILTER|3a 20|progid|3a|DXImageTransform.Microsoft.Gradient("; distance:0;
    content:"gradientType=0,startColorStr=";
    content:"<input name='envlpass' type='password'"; fast_pattern;
    classtype:web-application-attack;
    sid:2030542; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_07_16, deployment Perimeter, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_16;
)

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