The Challenge: Reducing Damage From a Delayed Ransomware Response

Ransomware-related damage can escalate quickly when defenders cannot determine what is happening and where to act first. A delayed initial response gives attackers more time to disable defenses and move through connected systems. To respond earlier, teams need evidence that shows whether the threat is present in their own environment and where follow-up should begin.

The Solution: Turning Ransomware Findings Into Action

We examine ransomware incidents and malware samples to turn technical findings into operational evidence. The CrazyHunter attacks against healthcare organizations in Taiwan provide one concrete example of how this work can support teams beyond the initially affected organizations.

  • Reveal the attack path through TTPs
    Our sample and campaign analysis identified that the attackers used a vulnerable driver,     zam64.sys, in conjunction with the BYOVD technique to terminate the EDR protection. It also showed how the attackers used AD Group Policy, including SharpGPOAbuse, to distribute the ransomware.

  • Validate exposure with IoCs
    We compiled malware and IoCs associated with the case. Our MDR team compared them with endpoint reports and activity records from customer environments under our monitoring.

The Outcome: Verified Exposure Status and Quick Response

The review resolved the immediate exposure question for monitored customers, while the case evidence established a basis for follow-up if related activity later appeared.

  • Confirmed exposure status
    The MDR review found no signs of related ransomware activity in the monitored customer environments at the time. Customers therefore received a current assessment grounded in their own endpoint and activity data.

  • Faster initial response
    By integrating threat intelligence into MDR and incident response, security teams can pinpoint threats faster and shift initial response efforts earlier using IoC deployment and TTP-based investigations. This proactive approach enables early identification and containment of ransomware actors before they can move laterally or execute widespread encryption, ultimately minimizing operational damage while significantly improving overall response accuracy.