AWS Security Group remote access allowed from an unknown external IP address

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	AWS Audit Log
Detection Modules	Cloud
ATT&CK Tactic	Defense Evasion (TA0005)
ATT&CK Technique	Impair Defenses: Disable or Modify Cloud Firewall (T1562.007)
Severity	Low

Description

A cloud identity has modified the ingress rules to allow unfamiliar ip addresses SSH or RDP access.

Attacker's Goals

Obtaining persistency persistence by creating a direct, reliable backdoor that allows them to remotely control the system without needing to re-exploit it.

Investigative actions

• Investigate any unusual activity originating from the suspected identity and any activity performed from the newly added ip addresses.