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AskCyber Home » News » News » Feds Warn of More Credible Threats after 6 Hospitals Attacked with Ransomware

Feds Warn of More Credible Threats after 6 Hospitals Attacked with Ransomware

2020-10-29 by Michelle Dvorak

Ryuk Ransomware Hospital Attacks

Imminent Ryuk Ransomware Attacks to Cripple US Hospitals, Healthcare Providers Likely

The Federal Bureau of investigations (FBI), the U.S. Department of Health and Human Services (HHS), and the Cybersecurity and Infrastructure Security Agency (CISA) have issued a joint cybersecurity advisory alert (AA20-302A). The bulletin warns the Healthcare and Public Health Sector (HPH) including US hospitals and health care providers about the threat of imminent Ryuk ransomware attacks.

“CISA, FBI, and HHS have credible information of an increased and imminent cybercrime threat to U.S. hospitals and healthcare providers,” the advisory stated

Attackers use Trickbot malware and Ryuk ransomware to keep the systems locked up while they steal data and disrupt health care services until a ransom is paid to release control.

Six hospitals were attacked in 24 hours this week with Ryuk ransomware according to the Washington Post. The victims include Sky Lakes Medical Center based in Klamath Falls, Oregon and St. Lawrence Health System in New York.

Trickbot malware has been used in at least six attacks against health care providers in the past week.

“CISA, FBI, and HHS have credible information of an increased and imminent cybercrime threat to U.S. hospitals and healthcare providers,” the advisory says.

Trickbot malware is a banking trojan developed from Dyre malware. Trickbot is used to steal login credentials exfiltrate emails crypto mining Anne to steal payment card information from point-of-sale (POS) terminals. Trickbot malware is also used to deploy Ryuk ransomware.

The attackers map the victim’s IT network an uninstall any security applications that might stop the ransomware from executing. They then attempt to delete all backup files and automatic backup snapshots made by Windows (Volume Shadow Copies). This will prevent the victim from recovering encrypted files without the decryption program.

Once a healthcare provider’s network is encrypted with ransomware, the attackers demand a ransom payable in Bitcoin. In an earlier Ryuk ransomware attacks, the cybercriminals demanded a ransom amount upfront. But now the attackers only make their demands known when the victim initiates contact. The victim is then provided sample decryption of two files as evidence.

However, even if the ransomware is paid and the decryptor is run correctly, there is no guarantee the decryptor will be effective.

In December of last year the United States Coast Guard reported that a Ryuk ransomware attack shut down a maritime port for about 30 hours while the network was recovered. that attack was believed to be launched with a phishing email sent to a maritime facility employee.

Last month Universal Health Services (UHS) was crippled in a widespread Ryuk ransomware attack. All UHS facilities in the United States were shut down forcing staff to resort to managing inpatient care on paper.

CISA, FBI, and HHS listed mitigations best practices for both their network and ransomware attacks in their advisory.

System administrators should:

  • Patch all operating systems software and firmware as soon as possible
  • Use multifactor authentication (MFA) for all online accounts
  • Focus on cyber security training for users
  • Enforce the use of strong passwords
  • Disable unused remote access/Remote Desktop Protocol (RDP) ports

System administrators should review the CISA Alert AA20-302A for more ransomware mitigations specific to the HPH sector

Filed Under: News Tagged With: CISA, ransomware, Ryuk

About Michelle Dvorak

Michelle writes about cyber security, data privacy focusing on social media privacy as well as how to protect your IoT devices. She has worked in internet technology for over 20 years and owns METRONY, LLC. Michelle earned a B.S. in Engineering from Rensselaer Polytechnic Institute. Michelle published a guide to Cyber Security for Business Travelers


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