AWS network ACL rule deletion

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-18
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

  • Requires:
    • AWS Audit Log

Detection Modules

Cloud

ATT&CK Tactic

Defense Evasion (TA0005)

ATT&CK Technique

Impair Defenses (T1562)

Severity

Low

Description

An AWS network ACL rule was deleted.

Attacker's Goals

This action may assist an attacker gain persistence for the cloud environment (in case of ingress rule).
Or in case of egress rule, this may allow an attacker to exfiltrate data.

Investigative actions

  • Check which VPC is affected and the resources it contains.
  • Check the rule number (as they effect by order).
  • Check if the rule is ingress/egress.