Is a Standalone Antivirus Enough Against Ransomware in 2026?

Last updated: October 12, 2026

Ransomware keeps grabbing headlines, and defenders keep asking the same question: is a traditional antivirus product still enough? PCI Security Standards Council's resource guide on defending against ransomware, originally surfaced on their blog and revisited in our earlier coverage on keyboard.co.il, frames the threat as sustained and global, not a passing spike. The guide points to an estimated 150% increase in ransomware activity in 2020 and notes that 2021 continued along the same trend, citing reporting from Harvard Business Review.

So the honest answer to that opening question is: usually, no. Standalone signature-based antivirus catches known families but misses the hands-on-keyboard, living-off-the-land and double-extortion tactics that now drive most major incidents. The interesting question is what to layer on top, and in what order.

At a glance

• PCI Security Standards Council published a resource guide on defending against ransomware, aimed at businesses and governments.
• The guide cites an estimated 150% increase in ransomware activity in 2020, with 2021 activity continuing along the same trend.
• It attributes the surge partly to disruption linked to the COVID-19 pandemic.
• It frames ransomware as an organized, criminal operation rather than isolated malware, and calls for immediate defensive action.
• The guide's primary deliverable is educational: guidance and resources, not a specific patch or product.

What the PCI guide actually says

Reading the guide on its own terms, three points stand out. First, according to blog.pcisecuritystandards.org, the framing is unusually blunt for a standards body: ransomware is treated as an ongoing criminal enterprise, not a one-off malware problem. Second, the cited growth figure — an estimated 150% rise in 2020 — comes from Harvard Business Review reporting dated June 2, 2021, not from PCI telemetry; that matters when you weigh how much weight to give the number in your own risk model. Third, the guide is a resource index, not a technical playbook, so it nudges organizations toward the question of preparedness rather than handing them a checklist.

Our earlier post on keyboard.co.il, originally reported by blog.pcisecuritystandards.org, picked up the same guidance and noted the same upward trend. There is no conflict between the two pieces; they cover the same resource, and the underlying numbers trace back to the same HBR source.

Why this matters

Treating ransomware as "just malware" is the most common reason defenses fail. A signature-based antivirus engine is built to match known samples, which is a poor fit for adversaries who reuse legitimate admin tools, encrypt files in place and rely on stolen credentials. The PCI guide's emphasis on "immediate action" is, in practice, a vote for behavior-based detection, hardened backups and tested response playbooks — the things that signature AV was never designed to do.

The trade-off is real, though. Endpoint protection platforms, EDR and XDR products cost more, generate more alerts and demand a human or a managed service to triage what they surface. For a small IT team, the operational drag of EDR can outweigh the benefit if no one is watching the console. Antivirus still has a place: it is cheap, low-friction and good at blocking commodity loaders that lead to ransomware in the first place. The defensible position is layered, not either/or.

Who benefits, who loses

Operators of small and mid-sized businesses, often the audience PCI guidance targets, benefit most from this framing: it validates spending on backup testing, segmentation and user training alongside any endpoint product. They lose if they read the guide as a purchase order for a single tool. Large enterprises, which have largely already moved to EDR or XDR, gain less new signal here but get a useful external reference for justifying tabletop exercises and recovery drills to non-technical leadership. MSSPs can use the framing to push managed detection contracts over break-and-fix AV renewals. The side that clearly loses is the organization that treats the resource guide as a compliance checkbox and assumes their existing consumer-grade antivirus counts as "prepared."

A practical scenario

Say you run a 200-person company with a lean IT team, Windows endpoints, Microsoft 365 and a remote-first sales force. Your current stack is a legacy signature-based antivirus that renews annually for a low per-seat fee. Using the PCI guide as a starting prompt, the first move is not to rip out AV. Map the realistic ransomware paths into your environment: phishing to credential theft, exposed RDP, unpatched VPN appliances and unmanaged personal devices. Layer accordingly. Keep signature AV for commodity blocking, add an EDR or managed EDR for behavior detection and credential misuse, enforce MFA on every external surface, and most importantly, run a quarterly restore-from-backup drill with a measured time-to-recovery. That last item — the restore drill — is what separates a defensible posture from a hopeful one, and it costs almost nothing compared to the endpoint tooling debate.

What to watch next

Watch three things over the next two quarters: the cadence of disclosed zero-days being chained into initial access (each one resets the patch-vs-EDR trade-off), insurance carriers tightening ransomware coverage requirements in ways that effectively mandate EDR or MFA, and regulators in payments-adjacent sectors leaning on PCI's framing to drive audit findings. The bottom line: PCI's resource guide is not a product recommendation, and reading it that way is a mistake. It is a prompt to move from "do we have antivirus?" to "can we detect, contain and recover without paying?" If the honest answer to that second question is no, the next dollar should go to backups and drills, not a new agent.

Key takeaways

• Treat the PCI guide as a readiness prompt, not a product recommendation.
• Keep signature-based antivirus in the stack for commodity blocking, but do not rely on it for hands-on-keyboard intrusions.
• Add behavior-based detection (EDR or managed EDR) only if someone will actually triage the alerts.
• Backups and tested restores remain the single highest-use control against ransomware.
• Track zero-day disclosure cadence, insurer mandates and PCI-adjacent regulator findings before re-evaluating your stack.