A cloud identity created or modified a security group

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: AWS Audit Log OR Azure Audit Log OR Gcp Audit Log
Detection Modules	Cloud
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify System Firewall: Cloud Firewall (T1686.001)
Severity	Informational

Description

A cloud identity created or modified a security group.

Attacker's Goals

• Bypass network security controls to gain access to restricted cloud resources.

Investigative actions

• Check which security rules were added or modified.
• Check whether the identity that modified the security group rules is permitted to perform such action.
• Check which cloud resources can be affected by the security group.

Variations

A cloud identity opened a security group to the Internet

Synopsis

Field	Value
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify System Firewall: Cloud Firewall (T1686.001)
Severity	Medium

Description

A cloud identity modified a security group to allow network access from the Internet.

Attacker's Goals

• Bypass network security controls to gain access to restricted cloud resources.

Investigative actions

• Check which security rules were added or modified.
• Check whether the identity that modified the security group rules is permitted to perform such action.
• Check which cloud resources can be affected by the security group.

A cloud identity opened a security group to an unknown IP

Synopsis

Field	Value
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify System Firewall: Cloud Firewall (T1686.001)
Severity	Low

Description

A cloud identity modified a security group to allow network access from an unknown IP.

Attacker's Goals

• Bypass network security controls to gain access to restricted cloud resources.

Investigative actions

• Check which security rules were added or modified.
• Check whether the identity that modified the security group rules is permitted to perform such action.
• Check which cloud resources can be affected by the security group.