What is credential stuffing?
Credential stuffing is a type of attack where previously compromised username and password combinations are used to gain unauthorized access to other systems or applications through automated means.
Azərbaycanca: Credential stuffing hücumu əvvəllər oğurlunmuş istifadəçi adı və parol kombinasiyalarının digər sayt və ya sistemlərə daxil olmaq üçün avtomatlaşdırılmış şəkildə yoxlanılmasıdır.
How it works
Threat actors use automated tools to test username and password pairs obtained from previous data breaches against various systems, including VPNs, SharePoint, and web applications. If a valid credential is found, they gain access to the system.
Defense checklist6
- 01
Implement Multi-Factor Authentication (MFA)
- 02
Enforce a strong password policy and encourage unique passwords
- 03
Use CAPTCHA or rate limiting in your applications
- 04
Educate users on choosing secure passwords
- 05
Implement security monitoring to detect suspicious login attempts
- 06
Identify users affected by previous breaches and notify them
Real-world evidence
Chick-fil-A suffered a credential stuffing attack resulting in over 13,000 customer accounts being compromised. A similar attack was detected against DIANColombia's infrastructure, involving both credential stuffing and brute force methods. Huntress SOC is tracking an active credential stuffing campaign targeting SonicWall devices.
Sources
- Chick-fil-A Accounts Get Fried in Credential Stuffing Attacksecurityweek
- Chick-fil-A data breach affects more than 13,000 customersbleepingcomputer
- ⚠🇨🇴 Atención Colombia: detectamos una operación de acceso inicial en curso, dirigida a la infraestructura de la @DIANColombia (Dirección de Impuestos y Aduanas Nacionales). Una de las herramientas se denomina "DIAN ATTACK v2" y está diseñada para automatizar ataques de autenticación contra múltiples servicios institucionales: → VPN corporativa (FortiGate). → SharePoint institucional. → Portales internos como KactusRL y MUISCA. → ADFS (Active Directory Federation Services). → OWA (Outlook Web Access). Al menos 148 credenciales potencialmente válidas comprometidas, tomar precauciones ASAP. La operación incluye la explotación de brute force y credential stuffing.x_1zrr4h
- Credential Stuffing Campaign Hits SonicWall | Huntress SOC Trackinghuntress
Other attack types
See also6
This guide is AI-written from the real incident sources skopnix collected — the examples above are drawn from those cited items, nothing is invented.