ET WEB_SERVER Generic Webshell Activity (POST)

Query · suricata

flow:established,to_client;
file.data;
content:"<html><head><meta http-equiv=|27|Content-Type|27 20|content=|27|text/html";
content:"charset="; distance:0;
content:"><title>"; distance:0;
content:"|20|-|20|WSO|20|"; within:50; fast_pattern;
target:src_ip;
Raw source ET WEB_SERVER Generic Webshell Activity (POST) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> any any (
    msg:"ET WEB_SERVER Generic Webshell Activity (POST)";
    flow:established,to_client;
    file.data;
    content:"<html><head><meta http-equiv=|27|Content-Type|27 20|content=|27|text/html";
    content:"charset="; distance:0;
    content:"><title>"; distance:0;
    content:"|20|-|20|WSO|20|"; within:50; fast_pattern;
    reference:md5,eda02ae6dd7d0fe841653f5e6a69d17e;
    classtype:web-application-attack;
    sid:2048923; rev:1;
    metadata:attack_target Web_Server, created_at 2023_10_27, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_27, reviewed_at 2023_10_27;
    target:src_ip;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.