Analytics BIOC Informational
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AWS network ACL rule deletion

An AWS network ACL rule was deleted.

Module:
Cortex Cloud
Licensed by:
Cloud Runtime Security (CRS)
Data source:
AWS Audit Log
ATT&CK tactics: Defense Evasion (TA0005)
ATT&CK techniques: Impair Defenses (T1562)
Attacker's goals:

Deleting an ingress rule may allow an attacker to gain persistence in the cloud environment. Deleting an egress rule may enable data exfiltration.

Investigative actions:

Identify which VPC and associated resources are affected. Check the rule number, as ACL rules are evaluated in order. Determine whether the rule is ingress or egress.

Test period:
N/A (single event)
Deduplication:
5 Days