bpost Ransomware Attack by TridentLocker
Belgium's national postal operator bpost was hit by a ransomware attack claimed by the TridentLocker group. The attack resulted in the publication of approximately 30 GB of data on the attackers' leak site, with 5,140 files potentially containing personal and business information. Bpost confirmed the incident was a cybersecurity breach affecting a limited set of data from a third-party software platform. The company stated it took immediate containment measures, engaged cybersecurity experts, and informed relevant authorities.
Signal context
First seen: Dec 4, 2025
Last updated: Jun 25, 2026
Status: Public signal
Key points
- Ransomware attack claimed by TridentLocker.
- Publication of ~30 GB of data, including 5,140 files.
- Compromised data from a third-party software platform.
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: Information
Likely country: 🇧🇪 Belgium
inferred from company domain
Watch ransomware, endpoint compromise and business interruption exposure.
- Source type: outside the affected organization
Impact area: Availability
- 26 signals in the same sector
- 22 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
The State of Ransomware: December 2025 | BlackFoghttps://www.blackfog.com/the-state-of-ransomware-december-2025/Public source from blackfog.com.
TridentLocker Ransomware Exposes WTC Health Program Data Breach - Kiteworkshttps://www.kiteworks.com/secure-file-transfer/sedgwick-tridentlocker-sftp-breach-wtc-health-program-phi-pii/Public source from kiteworks.com.
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