ET WEB_CLIENT Generic Webshell Password Prompt Accessed on External Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"|0d 0a 09|<form method=|22|POST|22|>|0d 0a 09 09|Password|3a 20 0d 0a 09 09|"; nocase;
content:"name=|22|password|22|>|0d 0a 09 09|<input type=|22|submit|22 20|value=|22|>>|22|>"; nocase; 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:"|0d 0a 09|<form method=|22|POST|22|>|0d 0a 09 09|Password|3a 20 0d 0a 09 09|"; nocase;
    content:"name=|22|password|22|>|0d 0a 09 09|<input type=|22|submit|22 20|value=|22|>>|22|>"; nocase; distance:0; fast_pattern;
    classtype:web-application-attack;
    sid:2030592; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_07_24, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_24;
)

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