Malware from Infected Email Attachment Breaches Hospital Network
Who: Pawnee County Memorial Hospital
# of records: 7038 Patients
Date: 11 February 2019
What Happened: Malware had been installed which allowed an unauthorized individual to gain access to its email system.
How it Happened: Malware was injected into the hospital’s email system when an employee opened a malicious email attachment. According to Pawnee County Memorial Hospital’s substitute breach notice, the email appeared to have been sent from a trusted source and the email attachment seemed genuine.
Outcome: Assisted by a third-party computer forensics expert, the hospital determined that the email attachment had been opened on November 16, 2018. The hacker was able to access employees’ email accounts from November 16 to November 24. The compromised email accounts contained a range of business reports, clinical reports, clinical summaries, and other internal documents. Those documents contained patients’ full names along with one or more of the following data elements: Date of birth, address, diagnosis, lab test results, a medical record number, insurance information, state ID number, driver’s license number and, for a limited number of patients, Social Security number. The hospital believes the attack was financially motivated and was not conducted with the aim of stealing patient information. In response to the breach, the hospital reset all passwords on employee email accounts and additional technology safeguards are being implemented to improve email security. The hospital has sent breach notification letters to all patients whose PHI was exposed and has offered complimentary enrollment in the MyTrueIdentity online credit monitoring service for 12 months.