Patch Wormable ‘Bad Neighbor’ Windows TCP/IP Flaw Now, Warns CISA
On October 2020 Patch Tuesday, Microsoft released a patch to correct a critical remove code execution vulnerability in the Microsoft Windows Transmission Control Protocol (TCP)/IP stack. The flaw concerns how the TCP/IP stack handles Internet Control Message Protocol version 6 (ICMPv6) Router Advertisement packets. The flaw was assigned a CVSS v3 score of 9.8 out of 10. While all patches should be applied promptly to prevent exploitation, there is usually a delay between patches being released and exploits being developed and used offensively against organizations; however, due to the severity of the flaw and the ease at which it can be exploited, patching this vulnerability is especially important. So much so that the Department of Homeland Security Cybersecurity and Infrastructure Security Agency (CISA) took to Twitter to urge all organizations to apply the patch immediately. An attacker could exploit the flaw remotely in a Denial of Service attack, resulting in a ‘blue screen of death’ system crash; however, exploitation could also allow the remote execution of arbitrary code on...
Piedmont Cancer Institute Phishing Attack Impacts 5,000 Patients
Piedmont Cancer Institute (PCI) in Atlanta, GA is notifying 5,226 patients that some of their protected health information may have been viewed or obtained by an unauthorized individual who gained access to the email account of one of its employees. Assisted by a third-party cybersecurity firm, PCI determined the email account was compromised for more than a month, with the unauthorized individual first accessing the account on April 5, 2020. The account was secured on May 8, 2020. A review of the compromised account concluded on August 8, 2020 and revealed it contained a variety of protected health information. In addition to names, affected patients had one or more of the following data elements exposed: date of birth, medical information such as diagnosis and treatment information, financial account information, and/or credit/debit card number. To prevent further breaches, PCI has implemented multi-factor authentication on its email accounts and has provided further training to the workforce on email security. Potential Data Breach Discovered by McLaren Oakland Hospital McLaren...
Sen. Warner Seeks Answers about Suspected Universal Health Services Ransomware Attack
Universal Health Services has confirmed that all 250 of its hospitals in the United States are back up and running after a suspected ransomware attack that knocked out its systems for 3 weeks. The attack started on or around September 27, 2020. All systems were brought back online by October 12. An update was posted on the UHS website this week saying, “With back-loading of data substantially complete at this point, hospitals are resuming normal operations.” While systems were down, clinicians were forced to work with pen and paper in order to continue providing care for patients and, at some locations, patients had to be diverted to alternate facilities to receive treatment. The health system reported the security breach as a malware attack which forced it to shut down its network; however, several insiders took to Reddit to voice their concerns and explain that this was a ransomware attack. Based on the data posted by those insiders, the attack appeared to have involved Ryuk ransomware. The operators of Ryuk ransomware are known to exfiltrate data prior to the...
CISA/FBI: APT Groups Chaining Legacy Vulnerabilities with Netlogon Flaw
A joint advisory has been issued by the Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) warning about sophisticated advanced persistent threat actors chaining exploits for multiple vulnerabilities in cyberattacks against federal and state, local, tribal, and territorial (SLTT) government networks, critical infrastructure, and election support systems. While there have been successful attacks on the latter, no evidence has been found to suggest any election data have been compromised to date. Several legacy vulnerabilities are being targeted along with more recently discovered vulnerabilities, such as the Windows Server Netlogon remote protocol vulnerability – CVE-2020-1472 – also known as Zerologon. A patch for the flaw was issued by Microsoft on August 2020 Patch Tuesday but patching has been slow. Chaining vulnerabilities in a single cyberattack is nothing new. It is a common tactic used by sophisticated threat groups to compromise networks and applications, elevate privileges, and achieve persistent access to victims’...
228,000 Individuals Impacted by Legacy Community Health Services Phishing Attack
Legacy Community Health Services in Texas is alerting 228,009 patients about a data breach involving some of their protected health information (PHI). The PHI was stored in an email account that was accessed by an unauthorized individual. The breach was detected on July 29, 2020, one day after an employee responded to a phishing email and disclosed login credentials to the attacker. The account was immediately secured and a computer forensics firm was engaged to assist with the investigation. No evidence was found to indicate emails were viewed by the attacker or that electronic protected health information was stolen, although the possibility of data theft could not be totally discounted. The compromised email account contained patient names, dates of service, and health information related to care at Legacy, along with a limited number of Social Security numbers. Complimentary membership to a credit monitoring and identity protection service was been offered to individuals whose SSN was compromised. Email security has been reinforced since the attack and the staff has been...



