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Rev: 1 • Oct 27, 2023, 12:00 PMET WEB_SERVER Generic Webshell Activity (POST)
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;)
Oct 27, 2023, 12:00 PM
Oct 27, 2023, 12:00 PM
Oct 27, 2023, 10:00 PM
Aug 18, 2025, 8:35 PM
rules/emerging-web_server.rules