ET WEB_SERVER Generic Webshell Accessed on Internal Compromised Server

Query · suricata

flow:established,to_client;
file.data;
content:"|2e|cmd|7b|background|2d|color|3a 23|000|3b|color|3a 23|FFF";
content:"|3c|input|20|name|3d 27|postpass|27 20|type|3d 27|password|27 20|size|3d 27|22|27 3e 20 3c|input|20|type|3d 27|submit|27 20|value|3d|"; nocase; distance:0; fast_pattern;
Raw source ET WEB_SERVER Generic Webshell Accessed on Internal Compromised Server · Suricata
Esc
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 Webshell Accessed on Internal Compromised Server";
    flow:established,to_client;
    file.data;
    content:"|2e|cmd|7b|background|2d|color|3a 23|000|3b|color|3a 23|FFF";
    content:"|3c|input|20|name|3d 27|postpass|27 20|type|3d 27|password|27 20|size|3d 27|22|27 3e 20 3c|input|20|type|3d 27|submit|27 20|value|3d|"; nocase; distance:0; fast_pattern;
    classtype:web-application-attack;
    sid:2034440; rev:1;
    metadata:attack_target Server, created_at 2021_11_12, deployment Perimeter, confidence Medium, signature_severity Major, tag WebShell, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_12, mitre_tactic_id TA0003, mitre_tactic_name Persistence, mitre_technique_id T1505, mitre_technique_name Server_Software_Component;
)

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.