
Case study Healthcare
Ransomware access surfaced before patient data was touched
A healthcare provider disabled a compromised access path before ransomware deployment or patient data exposure occurred.
Impact summary
A healthcare provider disabled a compromised access path before ransomware deployment or patient data exposure occurred.

01 / Observation
What Unit6 saw
- 01
Valid credentials for an active portal user
- 02
The corresponding MFA seed used to generate authentication codes
- 03
Evidence that the credentials had already been successfully tested
- 04
Indicators linking the access to ransomware-related activity
02 / Significance
Why it mattered
A healthcare organization relied on a claims processing portal protected by traditional multi-factor authentication (MFA).
Unit6 discovered that a ransomware-linked threat actor had obtained not only valid credentials for the portal, but also the MFA secret required to bypass authentication entirely.
The actor had already verified access and was preparing to move deeper into the environment.
Without intervention, the compromised account could have provided access to patient-linked financial records, claims data, and systems commonly targeted during ransomware operations.
03 / Confidence
How Unit6 established confidence
Valid credentials, an MFA seed, tested access, and ransomware-related indicators
This discovery originated from Unit6’s external intelligence collection and actor monitoring capabilities rather than internal security alerts.
04 / Response
What the customer could do
Working alongside the security team, Unit6 helped:
- Disable the compromised account
- Invalidate exposed MFA secrets
- Force secure re-enrollment of affected users
- Deploy phishing-resistant authentication for high-risk accounts
- Strengthen monitoring and access controls around the portal
The organization also reviewed historical activity to ensure no data had been accessed and no persistence mechanisms had been established.
05 / Documented outcome
Outcome
The attack path was eliminated before ransomware deployment or patient data exposure occurred.
The healthcare provider strengthened its identity security program, replaced vulnerable authentication methods, and gained confidence that a high-risk compromise had been neutralized before it became a reportable incident.
“We shut down the attack before patient data was touched.”
— CISO, Healthcare



