Password Spraying

Summary

Password spraying is a type of brute force attack where an attacker attempts a small number of commonly used passwords against many different user accounts to gain unauthorized access without triggering account lockouts.

Key Characteristics

• Targets multiple accounts with a limited set of passwords to avoid detection.
• Exploits weak or commonly used passwords across an organization.
• Avoids traditional brute force lockout mechanisms by spreading attempts over many accounts.
• Often used to gain initial access in credential-based attacks.
• Can be automated using scripts or specialized tools.

Defensive Controls

• Implement multi-factor authentication (MFA) to reduce reliance on passwords.
• Enforce strong password policies and regular password changes.
• Monitor login attempts for unusual patterns indicative of password spraying.
• Use account lockout policies with thresholds tailored to detect low-frequency attacks.
• Deploy anomaly detection systems to identify suspicious authentication behavior.

Related Security Solutions

Password spraying attacks are mitigated by identity and access management (IAM) solutions, security information and event management (SIEM) systems, multi-factor authentication platforms, and endpoint detection and response (EDR) tools that monitor and respond to suspicious login activities.