Skip to content
NewA calmer, faster ZeroHour

GMO Internet warns Desktop Cloud customers after ransomware threat

Original title: Japan’s GMO Internet Warns Customers to Unplug PCs as Hackers Threaten Ransomware

GBHackersby Mayura Kathir ()2 min read1
Part of a story covered by 8 sourcesGMO refuses ransom after Onamae trading-desktop breachMerged summary & timeline
AI summary · x-ai/grok-4.7Summaries by Vani AI

Attackers demanded about ¥8 billion after unauthorized access; GMO says no ransomware was confirmed by October 27.

Japan’s GMO Internet Group told Onamae.com Desktop Cloud customers to back up data, disconnect computers, shut them down, and unplug cables after suspected attackers threatened to publish information and launch ransomware at noon on October 27. GMO suspended the remote-desktop service on October 21 after unauthorized access and a ransom demand of about ¥8 billion, roughly $50 million. By 13:55 Japan time on October 27, GMO said no ransomware attack was confirmed. Suspected attackers had published material appearing to relate to the company and customers.

Unconfirmed: GMO has not confirmed encryption, and the published material is only described as appearing related to the company and customers.

Key facts
  • Reporting identified 26,739 potentially affected virtual desktop servers, not confirmed infections.
  • Customers reported unauthorized activity in trading accounts.
  • By 11:59 on October 27, completed device checks had found no malware.
  • GMO said it would not pay and offered ¥5,000 plus reimbursement for unauthorized trading losses.
  • Customers were told to use a separate device, end sessions, and enable multifactor authentication.
Security assessment · AI, from the article

Impact: Unauthorized cloud access, extortion, and claimed customer data exposure

What to do
  1. 1.Back up important files while computers are disconnected from networks.
  2. 2.Change financial credentials from a separate device and enable multifactor authentication.
  3. 3.Avoid email or SMS links and ignore requests for passwords or authentication codes.
Analyze this story with Vani AIImpact, who is affected and what defenders should do, in a new chat

From the original article

2 min read at gbhackers.com

Japan’s GMO Internet Group urged Onamae. com Desktop Cloud customers to back up their data, disconnect computers from networks, shut them down, and unplug connected cables after suspected attackers threatened to publish customer information and launch ransomware at noon on October 27. The emergency instructions followed unauthorized access to the company’s cloud desktop service and an […]

GBHackers

By Mayura Kathir · gbhackers.com

Read the full article at GBHackers

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.