HackNotice launches AI credential defense to invalidate stolen accounts

HackNotice has introduced Agentic Credential Defense, a new service that tests stolen credentials against approved login flows, captures proof of valid access, and helps customers invalidate exposed accounts before attackers can use them. The company says the tool is available now and is designed to speed up response to account takeover risk.

Why it matters: - Stolen credentials are only part of the risk. Security teams also need to know which exposed accounts still work. - Valid accounts can let attackers move through email, SaaS apps, remote access tools, cloud services, and internal systems. - Consumer-facing businesses can face account takeover, fraud, customer loss, and reputational damage when attackers reuse valid logins.

What happened: - HackNotice launched Agentic Credential Defense, an AI-powered service that continuously tests credentials from infostealer logs and credential dumps. - The service identifies valid accounts, captures proof of successful authentication, and triggers credential invalidation to interrupt account takeover. - HackNotice said the service is available today to existing customers and new subscribers. - Steve Thomas, CEO and founder of HackNotice, said the AI agent was trained to test credentials faster than attackers can, but only within approved customer scope.

The details: - Customers define the domains, applications, login URLs, authentication methods and testing scope they authorize. - HackNotice reviews the configuration before activation. - The agent continuously evaluates newly discovered credentials against customer-authorized login endpoints and authentication flows. - The service also works across websites and authentication flows it has not encountered before, as long as they are in scope. - The workflow has four stages: collect, test, prove and invalidate. - In the collect stage, HackNotice ingests infostealer logs, credential dumps and other exposed account data. - In the test stage, the agent attempts authentication only against customer-authorized applications and login endpoints. - In the prove stage, HackNotice records the valid account and captures evidence of the authenticated session. - In the invalidate stage, HackNotice can send a credential-invalidation request that includes the login URL and email address. - The password is never sent in the invalidation notification. - Customers can then reset the password, revoke active sessions and review the account for unauthorized activity. - HackNotice describes the product as the first time it has combined continuous credential discovery, AI-driven validation, proof capture and automated invalidation in one workflow.

Between the lines: - The launch shifts the focus from collecting exposed credentials to confirming whether those credentials still open a live account. - That matters because normal login activity can be difficult to separate from malicious use when attackers rely on legitimate credentials. - MITRE ATT&CK tracks valid accounts as technique T1078, and says adversaries may use them for initial access, persistence, privilege escalation and defense evasion. - HackNotice said research covering ransomware events in the prior 90 days found that 83% of victims had valid accounts used, abused or misused by ransomware groups. - The company said those accounts supported one or more attacker objectives, including initial access and persistence.

What's next: - HackNotice said customers can use the service to confirm valid access, preserve evidence and close exposed paths before attackers reuse credentials. - The company is positioning the product as an ongoing defensive workflow rather than a one-time review of leaked credentials. - HackNotice says the service is designed for authorized testing only, with scope defined by the customer and reviewed before activation.

The bottom line: - HackNotice is betting that faster proof of valid access, paired with automated invalidation, can shorten the window between credential exposure and account takeover. - Learn more at the company's announcement.