(Bloomberg) — Sony Corp. was warned about a year ago that hackers had infiltrated its network and were stealing gigabytes of data several times a week, underscoring a pattern of lapses predating a recent attack that has spilled Sony Pictures' secrets onto the Internet.

The hackers, who haven't been identified, sifted in late 2013 through data from the company's network, encrypted the information to cover their tracks and mined it on a regular schedule, said a person familiar with Sony's investigation of the breach who asked not to be named because the findings are confidential.

The company's cybersecurity problems date at least as far back as 2011, with a breach of Sony's PlayStation video-game network.

Want to continue reading?
Become a Free PropertyCasualty360 Digital Reader

Your access to unlimited PropertyCasualty360 content isn’t changing.
Once you are an ALM digital member, you’ll receive:

  • Breaking insurance news and analysis, on-site and via our newsletters and custom alerts
  • Weekly Insurance Speak podcast featuring exclusive interviews with industry leaders
  • Educational webcasts, white papers, and ebooks from industry thought leaders
  • Critical converage of the employee benefits and financial advisory markets on our other ALM sites, BenefitsPRO and ThinkAdvisor
NOT FOR REPRINT

© 2024 ALM Global, LLC, All Rights Reserved. Request academic re-use from www.copyright.com. All other uses, submit a request to [email protected]. For more information visit Asset & Logo Licensing.