Global law firm Jones Day confirms cyber attack and client data access
Global law firm Jones Day confirmed a cyber attack, described as a "phishing incident," which resulted in an unauthorized third party accessing a limited number of dated files for 10 clients. The Silent Ransom Group (also known as Luna Moth, Chatty Spider, and UNC3753) claimed responsibility for the breach, publishing a file directory and screenshots of purported negotiations. The group is known for targeting law firms using social engineering tactics. All affected clients have been notified.
Jonesday
- Domain
- jonesday.com
- Sector
- Professional, Scientific, and Technical Services
- Signals
- 1 linked
Signal context
First seen: Apr 7, 2026
Last updated: Jun 25, 2026
Status: Public signal
Key points
- Confirmed a "phishing incident" affecting client files.
- Unauthorized access to dated files for 10 clients.
- Silent Ransom Group claimed responsibility.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Professional, Scientific, and Technical Services
Likely country: Location not provided
The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.
- Source type: outside the affected organization
- Source type: supplier or third-party involvement
Impact area: Confidentiality
- 5 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Jones Day Gets Hacked While FBI Busy Planning Kash Patel's Next Vacationhttps://abovethelaw.com/2026/04/jones-day-gets-hacked-while-fbi-busy-planning-kash-patels-next-vacation/Public source from abovethelaw.com.
Jones Day confirms cyber attack after hackers access client files - Legal Cheekhttps://www.legalcheek.com/2026/04/jones-day-confirms-cyber-attack-after-hackers-access-client-files/Public source from legalcheek.com.
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