IP Rotation Pattern in SSO Spray

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	1 Hour
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: AzureAD OR Azure SignIn Log OR Idira OR Duo OR Okta OR OneLogin OR PingOne
Detection Modules	Identity Analytics
ATT&CK Tactic	Credential Access (TA0006), Resource Development (TA0042)
ATT&CK Technique	Brute Force: Password Spraying (T1110.003), Brute Force: Password Guessing (T1110.001), Compromise Accounts (T1586)
Severity	Informational

Description

A high volume of SSO authentication attempts was observed in a short time window. This behavior may indicate a password spray attack targeting multiple accounts.

Attacker's Goals

An attacker may be attempting to compromise user accounts through unauthorized access attempts.

Investigative actions

• Determine if the activity was performed by a legitimate user.
• Check for any successful logins that occurred following a series of failed attempts.
• Investigate the AS organization and evaluate the ASN's reputation for malicious activity.
• Review historical login behavior from the same IP addresses or ASN.
• Validate whether MFA was triggered or bypassed during the authentication attempts.

Variations

Potential Targeted SSO Password Spray Activity Detected

Synopsis

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

Description

A high volume of SSO authentication attempts was observed in a short time window. This behavior may indicate a password spray attack targeting multiple accounts.

Attacker's Goals

An attacker may be attempting to compromise user accounts through unauthorized access attempts.

Investigative actions

• Determine if the activity was performed by a legitimate user.
• Check for any successful logins that occurred following a series of failed attempts.
• Investigate the AS organization and evaluate the ASN's reputation for malicious activity.
• Review historical login behavior from the same IP addresses or ASN.
• Validate whether MFA was triggered or bypassed during the authentication attempts.

Suspicious SSO Login Attempts from Multiple IPs

Synopsis

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

Description

A high volume of SSO authentication attempts was observed in a short time window. This behavior may indicate a password spray attack targeting multiple accounts.

Attacker's Goals

An attacker may be attempting to compromise user accounts through unauthorized access attempts.

Investigative actions

• Determine if the activity was performed by a legitimate user.
• Check for any successful logins that occurred following a series of failed attempts.
• Investigate the AS organization and evaluate the ASN's reputation for malicious activity.
• Review historical login behavior from the same IP addresses or ASN.
• Validate whether MFA was triggered or bypassed during the authentication attempts.