Identity & Credential Attacks

Identity and credential attacks are cyberattacks that target user accounts, passwords, authentication mechanisms, access tokens, and other forms of digital identity.

Instead of directly attacking a server or application, attackers often target the identity of a legitimate user. Once an account is compromised, the attacker may be able to access email, cloud services, corporate applications, databases, or other resources available to that user.

What Are Credentials?

Credentials are information used to prove someone's identity.

Common examples include:

• Usernames and passwords

• API keys

• Authentication tokens

• Session cookies

• SSH keys

• Access tokens

• Multi-factor authentication (MFA) credentials

If an attacker obtains valid credentials, they may be able to appear as a legitimate user.

Common Identity & Credential Attacks

1. Brute-Force Attacks

In a brute-force attack, an attacker repeatedly attempts different passwords until the correct password is discovered.

Strong passwords, account lockout policies, rate limiting, and MFA can make these attacks more difficult.

2. Password Spraying

Instead of trying many passwords against one account, attackers try one or a small number of commonly used passwords against many accounts.

For example:

Password → Many usernames → Authentication attempts

This technique can help attackers avoid account lockouts that would occur from repeatedly targeting a single account.

3. Credential Stuffing

Credential stuffing uses previously stolen username/password combinations against other services.

This works because people sometimes reuse the same password across multiple websites.

Stolen credentials → Automated login attempts → Reused password → Account compromise

4. Phishing-Based Credential Theft

Attackers may create fake login pages or send convincing messages that encourage victims to enter their credentials.

The stolen credentials can then be used to access the legitimate service.

5. Pass-the-Hash

Pass-the-Hash is an attack technique commonly associated with Windows environments.

Instead of needing to know a user's actual password, an attacker who obtains a password hash may attempt to use that hash to authenticate to other systems.

This can become particularly dangerous when privileged credentials are compromised.

6. Pass-the-Ticket

Pass-the-Ticket involves abusing Kerberos authentication tickets to gain unauthorized access.

An attacker who obtains a valid ticket may attempt to use it to access resources without knowing the user's password.

7. Kerberoasting

Kerberoasting targets service accounts in Active Directory environments.

Attackers request Kerberos service tickets associated with service accounts and may attempt to crack the encrypted portion of those tickets offline to recover the account's password.

Weak service-account passwords can make this technique particularly effective.

8. Session and Token Theft

Modern applications frequently use session cookies and authentication tokens to maintain a user's authenticated session.

If an attacker obtains a valid session token, they may be able to impersonate the user without directly obtaining their password.

Why Identity Attacks Are Dangerous

Identity attacks can provide attackers with legitimate-looking access.

This makes them particularly challenging because the activity may initially appear to come from a normal user account.

A compromised account could potentially provide access to:

• Corporate email

• Cloud platforms

• Internal applications

• Databases

• Source-code repositories

• SaaS applications

• Sensitive company information

If the compromised account has elevated privileges, the potential impact can be significantly greater.

How Organizations Detect Identity Attacks

Security teams commonly monitor:

• Unusual login locations

• Impossible-travel events

• Repeated failed authentication attempts

• Password-spraying patterns

• New devices or sessions

• Unusual MFA activity

• Suspicious token usage

• Privileged account activity

• Authentication from unusual IP addresses

• Access to resources that the user normally does not access

Security teams can correlate identity provider logs, endpoint telemetry, VPN logs, cloud audit logs, and application logs to identify suspicious activity.

How to Protect Against Identity Attacks

Organizations can reduce the risk through:

• Strong and unique passwords

• Multi-factor authentication (MFA)

• Phishing-resistant authentication

• Password managers

• Conditional access policies

• Least-privilege access

• Privileged Access Management (PAM)

• Regular access reviews

• Monitoring authentication activity

• Disabling unnecessary accounts

• Protecting service accounts

• Detecting leaked credentials

Identity Attack Chain

A simplified identity attack can look like:

Credential Theft → Authentication → Account Compromise → Privilege Abuse → Resource Access → Data Theft

However, not every identity attack follows this exact sequence. Some attacks abuse authentication mechanisms, tokens, or existing sessions rather than directly stealing a password.

Key Takeaway

Identity is one of the most important security boundaries in modern environments.

If an attacker can successfully become a legitimate user, traditional network and endpoint controls may not immediately recognize the activity as malicious.

For this reason, organizations increasingly focus on Identity Threat Detection and Response (ITDR), strong authentication, least privilege, continuous monitoring, and Zero Trust principles.