ET WEB_SERVER Generic Mailer Accessed on Internal Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"<title>Mailer By ME</title>"; fast_pattern;
content:"<form id=|22|form1|22 20|name=|22|form1|22 20|method=|22|post|22|"; nocase; distance:0;
content:"<input type=|22|hidden|22 20|name=|22|vai|22|"; nocase; distance:0;
Raw source ET WEB_SERVER Generic Mailer Accessed on Internal Compromised 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 Accessed on Internal Compromised Server";
    flow:established,to_client;
    file.data;
    content:"<title>Mailer By ME</title>"; fast_pattern;
    content:"<form id=|22|form1|22 20|name=|22|form1|22 20|method=|22|post|22|"; nocase; distance:0;
    content:"<input type=|22|hidden|22 20|name=|22|vai|22|"; nocase; distance:0;
    classtype:web-application-attack;
    sid:2031028; rev:2;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_10_19, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_10_19;
)

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