ET WEB_SERVER Generic Mailer Check Accessed on Internal Server

Query · suricata

flow:established,to_client;
file.data;
content:"Upload is <b><";
content:"Check  Mailling ..<br>"; nocase; distance:0; fast_pattern;
content:"<input type=|22|submit|22 20|value=|22|Send test >>|22|>"; nocase; distance:0;
Raw source ET WEB_SERVER Generic Mailer Check Accessed on Internal Server · Suricata
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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 Mailer Check Accessed on Internal Server";
    flow:established,to_client;
    file.data;
    content:"Upload is <b><";
    content:"Check  Mailling ..<br>"; nocase; distance:0; fast_pattern;
    content:"<input type=|22|submit|22 20|value=|22|Send test >>|22|>"; nocase; distance:0;
    classtype:web-application-attack;
    sid:2030064; rev:2;
    metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_04_29, deployment Perimeter, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_29;
)

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