Possible Brute Force in universal authentication

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	1 Hour
Deduplication Period	1 Day
Detection Modules	Identity Analytics
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force (T1110), Brute Force: Password Guessing (T1110.001), Compromise Accounts: Cloud Accounts (T1586.003)
Severity	Informational

Description

An abnormally high amount of authentication attempts via universal authentication were seen within a short period of time. This may indicate a brute-force attack.

Attacker's Goals

An attacker is attempting to gain access to an account secured with MFA.

Investigative actions

• Check the legitimacy of this activity and determine whether it is malicious or not.
• Check if the user usually logs in from this country.
• Check whether a successful login was made after unsuccessful attempts.

Variations

Brute Force in universal authentication involving a honey user

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force (T1110), Brute Force: Password Guessing (T1110.001), Compromise Accounts: Cloud Accounts (T1586.003)
Severity	Medium

Description

An abnormally high amount of authentication attempts via universal authentication were seen within a short period of time. This may indicate a brute-force attack.

Attacker's Goals

An attacker is attempting to gain access to an account secured with MFA.

Investigative actions

• Check the legitimacy of this activity and determine whether it is malicious or not.
• Check if the user usually logs in from this country.
• Check whether a successful login was made after unsuccessful attempts.

Suspicious Brute Force in universal authentication

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force (T1110), Brute Force: Password Guessing (T1110.001), Compromise Accounts: Cloud Accounts (T1586.003)
Severity	Medium

Description

An abnormally high amount of authentication attempts via universal authentication were seen within a short period of time. This may indicate a brute-force attack.

Attacker's Goals

An attacker is attempting to gain access to an account secured with MFA.

Investigative actions

• Check the legitimacy of this activity and determine whether it is malicious or not.
• Check if the user usually logs in from this country.
• Check whether a successful login was made after unsuccessful attempts.

Brute Force in universal authentication

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force (T1110), Brute Force: Password Guessing (T1110.001), Compromise Accounts: Cloud Accounts (T1586.003)
Severity	Low

Description

An abnormally high amount of authentication attempts via universal authentication were seen within a short period of time. This may indicate a brute-force attack.

Attacker's Goals

An attacker is attempting to gain access to an account secured with MFA.

Investigative actions

• Check the legitimacy of this activity and determine whether it is malicious or not.
• Check if the user usually logs in from this country.
• Check whether a successful login was made after unsuccessful attempts.

Abnormal Brute Force in universal authentication

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force (T1110), Brute Force: Password Guessing (T1110.001), Compromise Accounts: Cloud Accounts (T1586.003)
Severity	Informational

Description

The number of failed authentication attempts for this user significantly exceeds their historical baseline (avg + 3*stddev).

Attacker's Goals

An attacker is attempting to gain access to an account secured with MFA.

Investigative actions

• Check the legitimacy of this activity and determine whether it is malicious or not.
• Check if the user usually logs in from this country.
• Check whether a successful login was made after unsuccessful attempts.