The 2026 Ransomware Resilience Playbook: Six Things to Test Before the Next Attack, Not After

Ransomware disclosures hit 7,551 victims in the year ending March 2026, a 24.9 percent increase over the prior year, according to Black Kite’s latest Ransomware Report. The pace is not steady either. The second half of that period ran 60 percent above the first half, and March 2026 alone logged 861 victims, the highest single month on record. The group count is fragmenting too, 146 active ransomware groups by June, 61 of them new entrants in a single reporting window.

None of that is news a CISO can act on directly. What follows is a practical playbook built from this year’s data, organized around the things worth testing in your own environment before an attacker tests them for you.

Why the usual advice needs an update

Most ransomware guidance still assumes you have time: time to detect, time to contain, time to call your incident response retainer before real damage is done. New data from Palo Alto Networks Unit 42’s 2026 Global Incident Response Report should change that assumption. Across the incidents the firm investigated, the fastest quarter of intrusions reached data exfiltration in 1.2 hours, down from 4.8 hours the year before. The median across all incidents was two days. If your last tabletop exercise assumed days of quiet dwell time before an attacker acted, it was testing a threat model that no longer matches the data.

There is also no single dominant way attackers are getting in this year, and that matters for where you point your testing budget. Verizon’s 2026 Data Breach Investigations Report found vulnerability exploitation now drives 31 percent of breaches, overtaking credential abuse for the first time in the report’s history. Sophos’s ransomware specific research tells a different story: 79 percent of the ransomware attacks it analyzed started with compromised identity, not an unpatched system, and 97 percent of the organizations hit that way already had multi factor authentication in place. Unit 42’s own numbers split the difference, with phishing and vulnerability exploitation tied at 22 percent each. Black Kite adds a third thread specific to this year: vendor and third party platform compromise, citing Salesforce OAuth token abuse and mass exploitation of Oracle E-Business Suite and PeopleSoft vulnerabilities as major 2026 attack paths.

Put those together and the honest conclusion is that identity, unpatched systems, phishing, and vendor platforms are all live attack paths this year. A playbook built around only one of them is a playbook built around last year’s attacker.

The playbook

1. Test identity like you mean it, not just like you deployed it. Multi factor authentication did not stop 97 percent of the identity based ransomware victims Sophos studied. Deploying MFA is a control. Verifying that it cannot be bypassed, through token theft, session hijacking, or social engineering of a help desk, is a test. Pair phishing resistant authentication and privileged access reviews with adversarial testing that specifically tries to get around them, the same way an attacker would.
2. Patch the things attackers are actually using this year, and verify the fix held. Nearly a third of breaches now start with vulnerability exploitation, and Black Kite found that vendor platforms like Salesforce, Oracle E-Business Suite, and PeopleSoft were significant 2026 entry points. Just as telling: 43.5 percent of ransomware victims in Black Kite’s dataset still carried a critical, unpatched vulnerability after their incident was closed. A patch ticket marked complete is not the same as a verified fix. External and application penetration testing exists specifically to confirm the gap is actually closed, not just scheduled to be.
3. Assume the perimeter will be breached, and test what happens next. With a median two day window between initial access and exfiltration, segmentation and lateral movement controls are doing the real work of limiting damage once something gets in. Internal network testing and red team engagements that start from an assumed foothold, rather than from the outside looking in, tell you whether that containment actually holds or whether an attacker can move from one compromised workstation to your crown jewel systems faster than your team can respond.
4. Test your backups the way an attacker would attack them, not the way your runbook assumes. A standard backup restore drill confirms that backups exist and restore cleanly. It does not confirm what happens when an attacker specifically targets and disables backup infrastructure before triggering encryption, a well documented tactic among ransomware affiliates. A red team exercise that includes backup infrastructure as a target, not an assumed safe zone, closes that gap before it becomes the reason a six figure ransom conversation happens.
5. Recalibrate your tabletop exercises to this year’s speed. A tabletop scenario built around days of quiet reconnaissance before an attacker strikes is testing a threat that mostly does not exist anymore. Build scenarios around the fast end of the range, hours, not days, and test whether your detection and escalation chain can actually keep pace. This does not replace technical testing. It tells you whether your people and your technical controls are both ready for the same threat model.
6. Move from an annual assessment to continuous validation. The ransomware ecosystem gained 61 new groups in a single reporting window and compressed its average attack speed by roughly four times year over year. An assessment cadence built around a once a year calendar date cannot keep pace with an adversary landscape that changes this fast. Continuous penetration testing and continuous vulnerability management close the gap between what your last assessment found and what is actually true in your environment today.

The throughline

Every item on this list has the same shape: a control your organization almost certainly has in some form, and a question about whether anyone has actually tried to defeat it under realistic, adversarial conditions. That is the gap between a security program that looks complete on paper and one that has been tested against the way ransomware actually operates in 2026, where identity, unpatched systems, phishing, and vendor platforms are all live paths in, and where the time between a foothold and real damage can be measured in hours.

This is the work we do for clients through red team and adversarial simulation engagements: putting your defenses in front of people whose job is to actually break them, the same way a real attacker would, rather than taking a control’s presence on a diagram as proof that it works. If you cannot say with confidence when each item on this list was last tested under those conditions, that is the honest starting point for this year’s ransomware readiness conversation.