Attackers Use Email AI Assistants to Hijack Accounts with Ease
A chilling new threat has emerged in the world of cybersecurity, where attackers are exploiting the very tools designed to make our lives easier. Researchers at Barracuda Networks have demonstrated how email account hijackers can use built-in AI assistants to compromise even the most secure accounts, including those of high-ranking executives.
The method is deceptively simple: once an attacker gains access to an email account, they can tap into its AI chatbot to elevate their privileges and gain control over sensitive information. The researchers simulated this attack on a compromised CEO’s account, using the chatbot to phish internal employees, bypass security filters, and eventually steal a large sum of money.
The process begins with establishing persistence in the compromised email account, which requires stealth. The attacker uses the AI chatbot to remove any evidence of its use, creating a “clean” trail that avoids detection. Next, they conduct reconnaissance by asking the chatbot for information about the organization’s structure and ongoing conversations. This reveals potential connections between the attacker and high-ranking officials.
The researchers then used the chatbot to phish the CEO with an internal email that appears legitimate due to its context and writing style. The attacker instructed the chatbot to construct a response using their writing patterns, creating a convincing message that tricks the CEO into clicking on a malicious link. Once clicked, the link routes through an adversary-in-the-middle proxy, allowing the attacker to bypass multifactor authentication (MFA) and login to the CEO’s account.
The attack is repeated to prevent detection of the newly compromised CEO email account, with the chatbot providing additional information about recent financial emails. The researchers simulated this by instructing the chatbot to respond to finance with a message saying that they needed to change the wire transfer details due to new banking information from the payee.
While this was a controlled simulation, there’s no reason to believe that an attacker couldn’t replicate these steps in real life, with potentially devastating consequences. The researchers emphasize that their goal is not to predict what will happen but to highlight the misuse of internal AI tools by attackers.
This research serves as a stark reminder that even our most trusted technology can be turned against us if we’re not vigilant. As users, it’s essential to remember that no security solution is foolproof and that a single compromised account can lead to catastrophic consequences. To mitigate this risk, consider implementing additional security measures such as:
* Regularly monitoring your email account activity
* Using two-factor authentication (2FA) for all accounts
* Keeping software up-to-date, including AI-powered tools
* Educating yourself on the potential risks and consequences of compromised accounts
By staying informed and taking proactive steps to secure our digital lives, we can minimize the risk of falling victim to these sophisticated attacks.
Source: SecurityWeek — 2026-08-04