Phone scams have evolved far beyond simple robocalls. Cybercriminals now exploit Voice over Internet Protocol (VoIP) systems to impersonate trusted parties, tricking individuals into disclosing sensitive data. This article explores why VoIP phishing, known as vishing, is so widespread and what your organization can do to combat it.
Why vishing is so prevalent
There are many reasons why cybercriminals are increasingly turning to VoIP phishing scams.
VoIP is easy to set up, but difficult to trace
Setting up a VoIP system is simple. A cybercriminal needs only a stable internet connection and basic software to launch a large-scale calling campaign.
Tracing these calls, however, is far more challenging. Calls can be routed through numerous servers and countries, creating a convoluted trail that makes it difficult for investigators to track.
VoIP offers a low-cost way to run large-scale scams
Cost is a major factor in the prevalence of VoIP phishing. Internet-based calls are far cheaper than traditional long-distance calls, especially at scale.
For cybercriminals, this means they can contact thousands, or even millions, of potential victims without spending much. Even if only a small percentage of people fall for the scam, the financial return can be huge, making it a highly profitable venture.
VoIP numbers are easily spoofed
Unlike traditional landline numbers, which are tied to a physical location, VoIP numbers are virtual and can be generated in minutes with minimal verification. VoIP systems can also be programmed to display any number or name on the caller ID. This tactic, known as spoofing, allows cybercriminals to convincingly impersonate legitimate organizations. People are more likely to answer and trust a call from a familiar name, often without questioning its authenticity.
How to protect your business from vishing
Follow these tips to build a stronger defense against vishing:
Create clear communication policies
Establish straightforward rules for handling sensitive information and make them easy to follow. For example, any request involving financial data, login credentials, or customer records should undergo a verification before disclosure. It can be as simple as calling the requester back on an official number or confirming through a known internal channel. By setting clear protocols, you reduce the likelihood of employees making mistakes when they’re in a hurry/under pressure
Reinforce awareness through training and culture
Vishing attacks often succeed by creating a sense of urgency. Cybercriminals could pose as a company executive needing immediate help or an IT technician handling a critical issue. Without proper training, an unsuspecting employee may find these scenarios to be highly convincing. That’s why it’s important to perform regular employee training. Demonstrate how these scams unfold, highlighting techniques such as spoofed numbers and impersonation.
More importantly, foster a workplace culture where it’s not just acceptable but encouraged to think twice and verify information. Employees should feel confident questioning unusual requests without fearing they’ll be reprimanded for causing delays.
Strengthen defenses with advanced tools and expert support
While employee awareness and policies are essential, the right tools and support add a critical layer of protection by identifying and filtering suspicious calls before they reach your team.
Modern call filtering and spam detection systems do more than block known scam numbers. They analyze calling patterns, flag unusual activity, and detect threats based on behavior, like a sudden surge of calls from an unfamiliar region. Some solutions even include caller verification features to help employees confirm if a call is legitimate. When paired with monitoring tools, these systems give businesses greater visibility into communication trends, allowing them to spot red flags early.
For a more comprehensive strategy, consider partnering with cybersecurity professionals. Our experts can assess your current setup, identify vulnerabilities, and recommend tailored solutions, from improving call authentication to testing your team’s readiness with simulated attacks. With the right mix of technology, policies, and support, your organization can stay one step ahead of cybercriminals. Reach out today to learn more.