Cyber Risks · Krebs on Security

Hackers Were Inside Citrix for Five Months

Summary: Citrix Systems disclosed that attackers had intermittent access to its internal network from Oct. 13, 2018 to Mar. 8, 2019, taking personal and financial data on employees, contractors, interns, job candidates and their dependents. The FBI alerted Citrix in March 2019 that cybercriminals likely entered through password spraying, and the company's Feb. 10, 2020 notification letter said the stolen data may have included Social Security or tax identification numbers, driver's license and passport numbers, financial and payment card numbers, and limited health claims information.

Key Takeaway: A crude attack - a handful of common passwords tried across many employee accounts - gave intruders five months inside a company whose VPN software is used by most of the Fortune 100, and Resecurity's claim that it warned Citrix on Dec. 28, 2018, which Citrix initially denied and later acknowledged, means the window was visible before it closed.

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Topics
Data Breaches
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