French law enforcement and cybersecurity agencies have launched a preliminary investigation into a data breach affecting crypto tax platform Waltio, after reports that personal information linked to tens of thousands of users may have been compromised. The inquiry is being handled by the Paris Public Prosecutor’s Office and France’s National Cyber Unit, which are assessing both the scope of the breach and the identities of affected users.
According to local reporting, a hacking group known as Shiny Hunters allegedly issued a ransom demand to Waltio after accessing personal data belonging to around 50,000 users, most of whom are based in France. While the exact nature of the stolen data has not been fully disclosed, authorities warned that the information could be misused to target crypto holders directly.

Officials cautioned that affected individuals may face social engineering attempts or physical threats, including efforts to coerce victims into transferring digital assets under false security pretenses. Such incidents are commonly referred to as “wrench attacks,” where criminals use intimidation, abduction, or threats against relatives to force crypto transfers. France has recorded several such cases in recent years.
The investigation comes as French regulators continue to enforce the EU’s Markets in Crypto-Assets (MiCA) framework. Crypto firms operating in France must declare whether they intend to seek a MiCA license or wind down local operations by June 30, underscoring growing scrutiny around data protection, compliance, and consumer safety in the digital asset sector.
Disclaimer
This content is for informational purposes only and does not constitute financial, investment, or legal advice. Cryptocurrency trading involves risk and may result in financial loss.
