First SSO access from ASN for user

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-04
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:
    • AzureAD

Detection Modules

Identity Analytics

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Valid Accounts: Domain Accounts (T1078.002)

Severity

Informational

Description

A user successfully authenticated via SSO with a new ASN.

Attacker's Goals

Use an account that was possibly compromised to gain access to the network.

Investigative actions

  • Confirm that the activity is benign (e.g. the user has switched locations and providers).
  • Verify if the ASN is an approved ASN to authenticate from.
  • Follow further actions done by the user.

Variations

First SSO access from ASN for user using an anonymized proxy

Synopsis

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Valid Accounts: Domain Accounts (T1078.002)

Severity

Low

Description

A user successfully authenticated via SSO with a new ASN. using an anonymized proxy.

Attacker's Goals

Use an account that was possibly compromised to gain access to the network.

Investigative actions

  • Confirm that the activity is benign (e.g. the user has switched locations and providers).
  • Verify if the ASN is an approved ASN to authenticate from.
  • Follow further actions done by the user.


Google Workspace - First SSO access from ASN for user

Synopsis

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Valid Accounts: Domain Accounts (T1078.002)

Severity

Informational

Description

A user successfully authenticated via SSO with a new ASN.

Attacker's Goals

Use an account that was possibly compromised to gain access to the network.

Investigative actions

  • Confirm that the activity is benign (e.g. the user has switched locations and providers).
  • Verify if the ASN is an approved ASN to authenticate from.
  • Follow further actions done by the user.