Rule History

SID: 2031473 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 2 • Jan 4, 2021, 12:00 PM

Message:

ET WEB_CLIENT Generic Webshell Accessed on External Compromised Server

Rule:

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:"<head/><form method=|22|post|22 20|action="; depth:34; nocase; fast_pattern; content:"<input type=|22|input|22 20|name=|22|f_pp|22 20|value="; distance:0; classtype:web-application-attack; sid:2031473; rev:2; metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2021_01_04, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_04;)

Created:

Jan 4, 2021, 12:00 PM

Updated:

Jan 4, 2021, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 15, 2025, 9:36 PM

Filename:

rules/emerging-web_client.rules