Frost Bank Data Posted by Everest Ransomware Group
The Everest ransomware group posted data from Frost Bank on its dark web leak site on April 20, 2026. This incident is believed to stem from a single-vendor compromise that also affected Citizens Financial Group, impacting two major U.S. banks simultaneously.
Signal context
First seen: Apr 20, 2026
Last updated: Jun 26, 2026
Status: Public signal
Key points
- Everest ransomware group claimed responsibility.
- Data posted on dark web leak site on April 20, 2026.
- Believed to be a single-vendor compromise affecting both Frost Bank and Citizens Financial Group.
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: Finance and Insurance
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: Availability
- 21 signals in the same sector
- 22 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
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