Stop Deepfake Attacks Before They Cost You Millions

Deepfake attacks represent one of the fastest-growing threats to business security, and your organization is probably not prepared. With AI technology advancing at breakneck speed, cybercriminals can now clone voices with just 30 seconds of audio and create convincing video impersonations of executives. The result? Nearly 50% of businesses have already experienced deepfake attacks, and experts predict that by next year, 30% of all enterprise fraud will involve this technology.

This blog post summarizes the main points of my latest podcast episode. If you’d like, you can listen to it or watch it at https://www.backupwrapup.com/

The threat is real, it’s happening now, and it’s only going to get worse.

Understanding How Deepfake Attacks Work

Deepfake attacks come in two main flavors: audio and video. Audio deepfakes are cheaper and easier to create, making them the more common threat. Attackers can purchase deepfake services relatively inexpensively, clone a voice using publicly available audio (think LinkedIn videos, conference presentations, or earnings calls), and start making fraudulent calls within hours.

Video deepfakes are more expensive and complex, but they’re becoming more accessible every day. The most sophisticated attacks combine both: starting with a short video call to establish credibility, then “dropping” the video due to “technical issues” and continuing via text or audio. This approach gives attackers the psychological advantage of the initial video verification without the cost and complexity of maintaining a real-time video deepfake.

The scary part? All the audio they need is already out there. CEOs, CFOs, and other executives regularly appear in public forums, post videos on social media, and participate in webcasts. That’s more than enough material to create a convincing voice clone.

The Two Main Types of Deepfake Attacks

Authorization fraud represents the most financially damaging category of deepfake attacks. In these scenarios, criminals impersonate executives to trick employees into authorizing wire transfers or payments to fraudulent vendors. The attacks are often highly targeted – attackers may have already compromised corporate systems, reviewed emails and calendars, and understand exactly who has authority to approve payments.

These attacks frequently target finance and accounting personnel who may not have personal relationships with the executives they’re supposedly speaking with. The combination of authority (it’s the CEO calling), urgency (we need this payment processed immediately), and familiarity with legitimate business processes makes these attacks devastatingly effective. One company lost $25 million to a deepfake attack where criminals joined a video conference call impersonating the CEO.

Credential theft attacks use deepfakes to reset passwords, modify MFA tokens, or bypass voice-based authentication systems. These attacks rely more on social engineering than direct impersonation, but deepfake technology makes them more convincing. Attackers may not be impersonating someone the help desk person knows personally, but using a synthetic voice that sounds professional and legitimate can significantly increase success rates.

Defending Against Deepfake Attacks: The Essentials

Multi-channel verification is your first line of defense against deepfake attacks. The principle is simple: if someone contacts you through one channel requesting a sensitive action, you verify through a completely different channel before proceeding. If the CFO calls asking for a wire transfer, you call them back on their known number. If someone texts you claiming their phone died and they need you to reset their password, you verify through email or an in-person conversation.

The key is making this verification mandatory, not optional. Attackers will create urgency and pressure to bypass normal procedures. Your policies need to be clear: no exceptions, no matter how urgent the request seems, no matter who’s asking. This requires buy-in from executive leadership, because they’ll be the ones inconvenienced when legitimate requests get slowed down by security protocols.

Callback protocols for high-risk transactions create another layer of protection. Any large payment, especially to a new vendor, should trigger mandatory verification procedures. This might mean contacting procurement to verify the vendor was properly onboarded, calling the requesting executive back on their known number, or requiring multiple approvals through different channels. The inconvenience is worth it when you’re protecting millions of dollars.

Training and Awareness: Your Human Firewall

Technology alone won’t solve the deepfake problem. You need regular employee training that specifically addresses deepfake scenarios. Your security awareness programs probably cover phishing emails and suspicious links, but do they cover what to do when you get a video call from someone who looks and sounds exactly like your CEO?

Finance teams, accounting departments, and help desk staff need specialized training because they’re the primary targets. Include deepfake scenarios in your tabletop exercises. Have someone attempt a fake authorization during a drill and see how your team responds. Make it safe for employees to question requests that don’t feel right, even when they come from executives.

The training needs to be ongoing because the threat landscape is changing constantly. What works today might not work tomorrow as deepfake technology improves and attackers develop new techniques.

What Not to Rely On

Caller ID is worthless. Spoofing phone numbers is trivial, and attackers can make it look like the call is coming from any number they choose. Don’t let a familiar number on your screen bypass your verification procedures.

Voice recognition systems without additional authentication are increasingly vulnerable to deepfake attacks. If your voice is your password, you need to rethink that security model. The same goes for liveness detection that only checks for basic biometric markers – deepfake technology is getting good enough to fool these systems.

The feeling that you “know” someone’s voice or that they “knew details about you” also can’t be trusted. Attackers do their homework. They’ve probably already compromised your systems, read your emails, and know exactly what meetings are scheduled and what projects are in flight. They’ll use that information to seem legitimate.

The Bottom Line

Deepfake attacks are a people, process, and technology problem. You need all three elements working together. Deploy detection tools where appropriate, but don’t rely on them exclusively. Build robust policies and procedures, train your team relentlessly, and create a culture where security protocols are followed even when – especially when – someone powerful is demanding an exception.

The threat is real, it’s growing, and it’s not going away. The time to prepare is now, before your company becomes another statistic in the rising tide of deepfake fraud.

Written by W. Curtis Preston (@wcpreston), four-time O'Reilly author, and host of The Backup Wrap-up podcast. I am now the Technology Evangelist at S2|DATA, which helps companies manage their legacy data