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Ransomware Attacks:Protect Medical Devices Cheat Sheet by

Ransomware Attacks: How to Protect Your Medical Device Systems
medical     systems     device     protect     ransomware     attacks-

Introd­uction

Some medical device systems may be at risk for these types of ransomware attacks, and a threat to patient care may exist. While your facility's IT department is likely tackling the ransomware threats with the currently available Microsoft security patches, some Window­s-based medical device systems will remain suscep­tible to ransomware attacks like WannaCry and Petya because either:

 ­ ­ ­ They are based on an older version of the Windows OS (for example, Windows XP) and can't be upgraded, or
 ­ ­ ­ They have not been validated for clinical use with the latest security patches.

Such systems are often managed separately from regular IT assets to ensure approp­riate clinical functi­onality through adherence to manufa­ctu­rer­-sp­ecific setup and requir­ements.

Do's 1-3

1. Identify networked medical device­s/s­erv­ers­/wo­rks­tations that are operating on a Windows OS. Useful sources for this inform­ation may include:
 ­ ­ ­ a) Medical device inventory (i.e., comput­erized mainte­nance management systems)
 ­ ­ ­ b) Change management systems
 ­ ­ ­ c) Manufa­cturer Disclosure Statement of Medical Device Security (MDS2) forms obtained during device purchase
 ­ ­ ­ d) Medical device manufa­cturers
 ­ ­ ­ e) Alerts from the Industrial Control Systems Cyber Emergency Response Team (ICS-C­ERT)—a list of some medical devices impacted by WannaCry and Petya can be found here: https:­//i­cs-­cer­t.u­s-c­ert.go­v/a­ler­ts/­ICS­-AL­ERT­-17­-13­5-01I

2. Identify whether connected medical device­s/d­evice servers have the relevant Microsoft Windows OS security patches. (All Windows versions without the MS17-010 security patch may be vulnerable to the WannaCry and Petya ransom­ware.)

3. Consider running a vulner­ability scan on your medical device networks to identify affected medical devices.
 ­ ­ ­ a) Vulner­ability scanning can be used to identify devices that may be vulnerable to malware.
 ­ ­ ­ b) This method should only be used if (1) inform­ation is not available through other sources about the existence of a Windows OS and the associated vulner­abi­lities on your medical devices and (2) you already have a list of which devices and systems are compatible with vulner­ability scanning. ECRI Institute is aware of medical device failures that occurred when systems incomp­atible with vulner­ability scanning were scanned.
 

Do's 4-8

4. If medical device­s/s­ervers are identified that didn't receive the security patch, contact the device vendor to determine the recomm­ended actions for dealing with the current ransomware threat. Request written docume­ntation of those recomm­end­ations from the manufa­cturer.

5. If your device is managed by a third party or indepe­ndent service organi­zation, request prompt instal­lation of approp­riate security patches and docume­ntation to support risk mitiga­tion. Identify terms in the existing service contract covering respon­sib­ilities in regard to security patch updates.

6. Coordinate with the facility's internal IT department to update affected medical devices in accordance with the manufa­ctu­rer's recomm­end­ations as soon as practi­cab­le.
 ­ ­ ­ a) Medical devices require all updates to firmware and software to be validated, which often delays the availa­bility of patches and updates. For any medical device vendors without a validated security patch, demand expedi­tious valida­tion.
 ­ ­ ­ b) Many medical device updates must be installed manually while the unit is removed from use (that is, they can't be distri­buted remotely), and downtime can directly impact patient care.

These factors should be considered when formul­ating an update response.

7. Prioritize response on any connected Window­s-O­S-based medical device systems as follows:
 ­ ­ ­ a) Life-c­ritical devices
 ­ ­ ­ b) Therap­eutic devices
 ­ ­ ­ c) Patient monitoring devices
 ­ ­ ­ d) Alarm notifi­cation systems
 ­ ­ ­ e) Diagnostic imaging systems
 ­ ­ ­ f) Other

8. If a malware infection is identified or suspected in a medical device:
 ­ ­ ­ a) If clinically accept­able, first disconnect the medical device from the network and then work with your internal IT department and the device manufa­cturer to contain the infection and to restore the system.
 ­ ­ ­ b) If any unencr­ypted patient data was involved, inform risk management so that the potential breach can be handled in accordance with HIPAA requir­ements.

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