Suspicious HTTP parameters detected

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Palo Alto Networks Firewall EAL Logs OR XDR Agent
Detector Tags	Webshell Analytics
ATT&CK Tactic	Initial Access (TA0001), Persistence (TA0003)
ATT&CK Technique	External Remote Services (T1133), Server Software Component: Web Shell (T1505.003)
Severity	Medium

Description

The endpoint received suspicious HTTP parameters via an HTTP request, which may indicate attempts to exploit server components or web shell activity.

Attacker's Goals

• Attackers may exploit server components or misconfigurations to access arbitrary sensitive files on the web server.

Investigative actions

• Inspect the legitimacy of the URI path and the parameters values sent to the server.
• Ensure that the rare URI is not a legitimate result of routine development actions on the web server.