ET WEB_CLIENT Generic Webshell Accessed on External Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"<meta name=|22|Description|22 20|content=|22|Mr.Rm19"; nocase;
content:">Time On Server : <font color="; nocase; distance:0;
content:">Server IP : <font color="; nocase; distance:0;
content:">Current Dir : </font><a href="; nocase; distance:0;
content:">Mass Deface</a>"; nocase; distance:0; fast_pattern;
Raw source ET WEB_CLIENT Generic Webshell 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 Accessed on External Compromised Server";
    flow:established,to_client;
    file.data;
    content:"<meta name=|22|Description|22 20|content=|22|Mr.Rm19"; nocase;
    content:">Time On Server : <font color="; nocase; distance:0;
    content:">Server IP : <font color="; nocase; distance:0;
    content:">Current Dir : </font><a href="; nocase; distance:0;
    content:">Mass Deface</a>"; nocase; distance:0; fast_pattern;
    classtype:web-application-attack;
    sid:2029938; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_04_17, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_17;
)

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