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What is Vishing?
Vishing — short for "voice phishing" — is when attackers use phone calls instead of emails to manipulate people into sharing sensitive information or taking harmful actions. Phone calls create a sense of immediacy and personal connection that emails can't match, and they bypass all of your email security filters. With AI voice cloning now widely available, attackers can even impersonate specific people your team knows and trusts.
How a Vishing Attack Works
Gather phone numbers and context
Attackers find direct phone numbers, extensions, and organizational details from company websites, LinkedIn, data broker sites, and previous breach data.
Establish caller credibility
They spoof caller ID to show a trusted number (like your IT help desk or a known vendor) and open the conversation with enough insider knowledge to sound legitimate.
Create urgency over the phone
The live conversation format lets attackers react in real time, answer questions, and escalate pressure — "I need this resolved before the system locks you out in 15 minutes."
Extract credentials or actions
The target provides passwords, approves access requests, or follows instructions to install remote access software — all while believing they're speaking with a legitimate caller.
Real-World Example
Attackers called the help desk of a major casino operator, impersonating an employee whose details they found on LinkedIn. They convinced the technician to reset the employee's credentials, then used that access to deploy ransomware across the entire network. The attack cost the company over $100 million in losses and recovery costs.
How AiVERSARY Detects Vishing Risk
AiVersary's OSINT reports identify the personal and professional information that makes vishing attacks convincing: direct phone numbers listed in public directories, voice samples from conference recordings, and organizational details that let callers impersonate insiders. The report helps you understand and reduce your team's phone-based attack surface.
Is your organization exposed to vishing?
AiVERSARY scans your public footprint and identifies the exact data attackers would use against you. $499 per report.
Get Your Threat ReportRelated Terms
Social Engineering
Social engineering is the practice of manipulating people into giving up confidential information or taking actions that compromise security. Instead of breaking through firewalls and encryption, attackers exploit trust, authority, urgency, and helpfulness — basic human instincts that no software patch can fix. It is the foundation of nearly every major breach.
Pretexting
Pretexting is when an attacker creates a fabricated scenario — a "pretext" — to trick someone into sharing information or performing an action they normally wouldn't. Think of it as method acting for criminals: they invent a believable character and situation, then play that role convincingly enough to bypass your team's natural skepticism. The quality of the pretext depends entirely on how much real information the attacker can gather beforehand.
Whaling
Whaling is a form of phishing that specifically targets senior executives — the "big fish" in an organization. These attacks are highly personalized, well-researched, and designed to exploit the authority and access that come with leadership positions. Because executives can authorize large transactions, access sensitive data, and override security procedures, a single successful whaling attack can have catastrophic consequences.
Spear Phishing
Spear phishing is a targeted email attack where criminals research a specific person and craft a message designed just for them. Unlike mass spam, these emails reference real details about your job, your colleagues, or recent company events to appear legitimate. They are the number one way attackers breach organizations today.