Linux system firewall was modified

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent with eXtended Threat Hunting (XTH)
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify System Firewall (T1686)
Severity	Low

Description

The system firewall was modified.

Attacker's Goals

Exfiltrate data or move laterally in the organization.

Investigative actions

• Examine the command to understand which IPs or ports were affected.
• Check the communication allowed by the modified firewall rule.