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Cyber Threat
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Ransomware victim Telecommunication

bpost

Listed by Tridentlocker on · organisation based in Belgium

bpost.be

Disclosed
Dec 1, 2025
Leak-site listing date
Threat group
Tridentlocker
18 victims listed
Country
Belgium
#26 most targeted
Sector
Telecommunication

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Tridentlocker. Figures and technique mappings are quoted from the source data, not inferred.

About the Tridentlocker group

TridentLocker is a newly emerged ransomware group (surfaced mid-2025) targeting organizations managing high volumes of regulated or third-party data — including government services, telecom, and engineering firms — across the US, Canada, UK, and Asia using double-extortion tactics. Tridentlocker has listed 17 victims since October 2025.

Incident analysis

bpost was listed by Tridentlocker ransomware, a group with 18 victims recorded in this database. The listing appeared on the group's leak site on December 1, 2025.

bpost is based in Belgium and operates in the Telecommunication sector. Belgium ranks #26 worldwide for ransomware disclosures, with 142 victims in this database.

Sector context. Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Tridentlocker typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was bpost attacked by ransomware?

Yes. bpost was listed as a victim of the Tridentlocker ransomware group on December 1, 2025. The organisation is based in Belgium and operates in the Telecommunication sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked bpost?

bpost was attacked by Tridentlocker ransomware. Tridentlocker is one of the most active ransomware groups, having claimed 18 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the bpost ransomware attack occur?

The ransomware attack on bpost was disclosed on December 1, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the bpost ransomware attack?

The specific data stolen from bpost has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Telecommunication organisation, bpost likely held sensitive business data, client information, and operational records.

How can organisations protect against Tridentlocker attacks?

To defend against Tridentlocker and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.