Carl B. Johnson
Author

Carl B. Johnson

vCISO and compliance expert.

https://carlbjohnson.com

posts

Ransomware Attack Prevention

Ransomware Attack Prevention: What Actually Works in 2026

A Single Click Cost Change Healthcare $22 Million in Ransom In February 2024, the BlackCat/ALPHV ransomware group crippled Change Healthcare — a company processing roughly one-third of all U.S. health claims. UnitedHealth Group confirmed paying a $22 million ransom. Patient data for over 100 million individuals was compromised. The

Carl B. Johnson May 14, 2026 5 min read
DNS Spoofing

DNS Spoofing Attack: How Hackers Redirect Your Traffic

In April 2024, researchers at Akamai discovered a massive DNS hijacking campaign targeting financial institutions across Southeast Asia. Attackers poisoned DNS caches at the ISP level, silently redirecting thousands of banking customers to pixel-perfect phishing sites. Victims entered their credentials on pages that looked identical to their bank's

Carl B. Johnson May 14, 2026 5 min read
Cyber Incident Response Steps

Cyber Incident Response Steps That Actually Work

The Breach That Exposed a Missing Playbook In 2023, MGM Resorts lost an estimated $100 million after a social engineering attack gave threat actors access to critical systems. The attackers called the help desk, impersonated an employee, and got in. What made the damage so severe wasn't just

Carl B. Johnson May 14, 2026 5 min read
Insider Threats

Malicious Insider vs Negligent Insider: The Real Threat

One Employee Stole Data. The Other Just Clicked a Link. Both Cost Millions. In 2022, a former Amazon employee was convicted for her role in the Capital One breach that exposed over 100 million customer records. That same year, the Verizon Data Breach Investigations Report found that 82% of breaches

Carl B. Johnson May 13, 2026 5 min read
NIST Standards

NIST Standards: What Actually Matters for Your Security

The Framework Everyone References but Few Actually Implement In 2023, the MOVEit Transfer breach ripped through over 2,600 organizations worldwide. Many of those companies had compliance checklists. Many referenced NIST standards in their security policies. And yet, basic access controls and patch management — core tenets of NIST guidance — were

Carl B. Johnson May 13, 2026 6 min read
Phishing Prevention Tips

Phishing Prevention Tips That Actually Stop Attacks

In March 2024, a finance employee at a multinational firm wired $25 million to threat actors after a deepfake video call that impersonated the company's CFO. The attack started with a single phishing email. That one message opened the door to a loss most companies would never recover

Carl B. Johnson May 13, 2026 5 min read
Cybersecurity Due Diligence

Cybersecurity Due Diligence: What Most Companies Miss

The $350 Million Typo in Verizon's Yahoo Deal When Verizon acquired Yahoo in 2017, the discovery of two massive data breaches — affecting all 3 billion Yahoo accounts — knocked $350 million off the purchase price. That's not a rounding error. That's what happens when cybersecurity

Carl B. Johnson May 12, 2026 5 min read
Phishing Definition

Phishing Definition: What It Really Means in 2026

In 2024, the FBI's Internet Crime Complaint Center received over 298,000 phishing complaints — making it the most reported cybercrime category for the fifth consecutive year. That number almost certainly undercounts reality. Most phishing attacks never get reported. If you've landed here searching for a phishing

Carl B. Johnson May 12, 2026 5 min read
CISA Cybersecurity Guidelines

CISA Cybersecurity Guidelines: What Actually Matters

In January 2024, CISA disclosed that a threat actor had exploited vulnerabilities in Ivanti Connect Secure products to breach the agency's own systems. Let that sink in. The federal agency responsible for defending U.S. critical infrastructure got hit. If CISA itself isn't immune, your organization

Carl B. Johnson May 11, 2026 5 min read