Japanese web portals hacked, up to 100,000 accounts compromised

Yahoo Japan found malicious software on its servers but no data was lost, while rival goo said up to 100,000 accounts were hacked

Two of Japan's major Internet portals were hacked earlier this week, with one warning that as many as 100,000 user accounts were compromised, including financial details.

Goo, a Japanese Internet portal owned by network operator NTT, said it had no choice but to lock 100,000 accounts to prevent illicit logins. The company said it had confirmed some of the accounts had been accessed by non-users. The accounts can include financial details such as credit card and bank account information, as well as personal details and email.

The Web portal said it detected a series of brute-force attacks late Tuesday evening, with some accounts hit by over 30 login attempts per second. Goo said the attacks came from certain IP addresses, but didn't disclose any more information.

Also on Tuesday evening, Yahoo Japan said it discovered a malicious program on company servers. The program had extracted user data for 1.27 million users, but was stopped before it leaked any of the information outside of the company.

There was no immediate connection between the two incidents.

Yahoo Japan, owned by Softbank, is the country's dominant Internet portal and accounts for over 55 percent of search and portal use in the country, with hundreds of millions of page views per day, according to online service provider GA-Pro. The portal, operated separately from its U.S. namesake, has a strong mobile presence as parent Softbank also runs one of Japan's largest mobile operators. Rival Google accounts for about 42 percent.

Goo was extremely popular a decade ago as the Internet became popular in Japan, but has faded in recent years and currently accounts for less than 1 percent of Internet users. The site offers an array of portal services including search, mail and shopping.

Goo said it is still determining the scale of the damage from the attacks, while increasing its monitoring and asking users to pick more complicated passwords.

Yahoo Japan said it was taking the incident seriously and working to prevent reoccurrences.

Join the CSO newsletter!

Error: Please check your email address.

Tags Yahoo Japansecuritydata breach

More about GoogleNTT AustraliaSoftbankYahoo

Show Comments

Featured Whitepapers

Editor's Recommendations

Solution Centres

Stories by Jay Alabaster

Latest Videos

  • 150x50

    CSO Webinar: Will your data protection strategy be enough when disaster strikes?

    Speakers: - Paul O’Connor, Engagement leader - Performance Audit Group, Victorian Auditor-General’s Office (VAGO) - Nigel Phair, Managing Director, Centre for Internet Safety - Joshua Stenhouse, Technical Evangelist, Zerto - Anthony Caruana, CSO MC & Moderator

    Play Video

  • 150x50

    CSO Webinar: The Human Factor - Your people are your biggest security weakness

    ​Speakers: David Lacey, Researcher and former CISO Royal Mail David Turner - Global Risk Management Expert Mark Guntrip - Group Manager, Email Protection, Proofpoint

    Play Video

  • 150x50

    CSO Webinar: Current ransomware defences are failing – but machine learning can drive a more proactive solution

    Speakers • Ty Miller, Director, Threat Intelligence • Mark Gregory, Leader, Network Engineering Research Group, RMIT • Jeff Lanza, Retired FBI Agent (USA) • Andy Solterbeck, VP Asia Pacific, Cylance • David Braue, CSO MC/Moderator What to expect: ​Hear from industry experts on the local and global ransomware threat landscape. Explore a new approach to dealing with ransomware using machine-learning techniques and by thinking about the problem in a fundamentally different way. Apply techniques for gathering insight into ransomware behaviour and find out what elements must go into a truly effective ransomware defence. Get a first-hand look at how ransomware actually works in practice, and how machine-learning techniques can pick up on its activities long before your employees do.

    Play Video

  • 150x50

    CSO Webinar: Get real about metadata to avoid a false sense of security

    Speakers: • Anthony Caruana – CSO MC and moderator • Ian Farquhar, Worldwide Virtual Security Team Lead, Gigamon • John Lindsay, Former CTO, iiNet • Skeeve Stevens, Futurist, Future Sumo • David Vaile - Vice chair of APF, Co-Convenor of the Cyberspace Law And Policy Community, UNSW Law Faculty This webinar covers: - A 101 on metadata - what it is and how to use it - Insight into a typical attack, what happens and what we would find when looking into the metadata - How to collect metadata, use this to detect attacks and get greater insight into how you can use this to protect your organisation - Learn how much raw data and metadata to retain and how long for - Get a reality check on how you're using your metadata and if this is enough to secure your organisation

    Play Video

  • 150x50

    CSO Webinar: How banking trojans work and how you can stop them

    CSO Webinar: How banking trojans work and how you can stop them Featuring: • John Baird, Director of Global Technology Production, Deutsche Bank • Samantha Macleod, GM Cyber Security, ME Bank • Sherrod DeGrippo, Director of Emerging Threats, Proofpoint (USA)

    Play Video

More videos

Blog Posts

Market Place