Computer Security US Blog

Computer Security News and Insights

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
Smishing Attacks

Smishing Attack Examples: Real Texts That Stole Millions

In 2023, the FBI's IC3 reported over $5.6 billion in losses from phishing and its variants — and smishing, the SMS-based cousin, drove a massive chunk of that number. I've watched smishing evolve from clumsy "you won a prize" texts into sophisticated, multi-step social

Carl B. Johnson May 10, 2026 5 min read
Phishing

What Is Phishing? The Attack Behind 80% of Breaches

In January 2024, a finance employee at a multinational firm in Hong Kong wired $25.6 million to criminals after a video call with what appeared to be the company's CFO. Every person on that call was a deepfake. The attack started with a single phishing email. If

Carl B. Johnson May 10, 2026 5 min read
Trojan Horse Malware

Trojan Horse Malware: What It Really Does Inside Your Network

The Invoice That Took Down a Hospital Network In 2023, a hospital system in Illinois watched helplessly as Qakbot — a trojan horse malware strain — moved laterally through its entire Active Directory environment in under four hours. The initial infection? A single employee opened what looked like an overdue vendor invoice

Carl B. Johnson May 09, 2026 5 min read
Cloud Storage Security Risks

Cloud Storage Security Risks: What's Actually Exposing You

A Single Misconfigured Bucket Exposed 3 Billion Records In 2021, Cognyte left an unsecured database containing over 5 billion records — scraped from previous breaches — sitting in a cloud storage instance with no authentication required. Anyone with a browser could reach it. That's not a sophisticated nation-state attack. That&

Carl B. Johnson May 09, 2026 5 min read
Spoofing Caller

Spoofing Caller Attacks: How Hackers Weaponize Your Phone

In 2023, the FBI's Internet Crime Complaint Center received over 40,000 complaints related to spoofing, with losses exceeding $300 million. That number keeps climbing. A spoofing caller attack — where a threat actor manipulates the caller ID to impersonate a trusted number — is one of the oldest tricks

Carl B. Johnson May 08, 2026 5 min read
Cybersecurity for Nonprofits

Cybersecurity for Nonprofits: A Practical Survival Guide

The Breach That Cost a Children's Charity Everything In 2023, Save the Children Federation disclosed it had been hit by the BianLian ransomware gang, which claimed to have stolen nearly 7 GB of sensitive data including financial records, medical information, and personal data. A global nonprofit with significant

Carl B. Johnson May 08, 2026 5 min read
Ransomware Protection

Ransomware Protection Tips That Actually Work in 2026

A Single Click Cost One Hospital Chain $100 Million In 2024, Change Healthcare — the payment processing backbone of the U.S. healthcare system — was crippled by a ransomware attack attributed to the ALPHV/BlackCat group. UnitedHealth Group, its parent company, disclosed the incident would cost over $870 million in direct

Carl B. Johnson May 07, 2026 5 min read
Third Party Risk Management

Third Party Vendor Cybersecurity Risk: A Practical Guide

The Breach That Didn't Start With You In early 2024, a massive data breach at Change Healthcare — a subsidiary of UnitedHealth Group — disrupted the entire U.S. healthcare payment system for weeks. The root cause? A threat actor exploited compromised credentials on a remote access portal that lacked

Carl B. Johnson May 07, 2026 5 min read