Was bpost hit by ransomware?

bpost was listed by the tridentlocker ransomware operation (Belgium), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the tridentlocker ransomware group?

tridentlocker is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the bpost breach?

tridentlocker published data attributed to bpost. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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bpost

Claimed by Tridentlocker · listed 8 months ago

Age

since listed · data leaked

Status timeline

ListedDec 1, 2025
Data leakeddate unknown

At a glance

Group: Tridentlocker
Status: Data leaked
Country: Belgium
Sector: Telecommunication
Listed on leak site: Dec 1, 2025

About the victim

AI dossier — public-source company profile

bpost is the national postal operator of Belgium, providing mail, parcel, and logistics services across Belgium and internationally. It is a publicly listed company headquartered in Brussels and one of Belgium's largest employers. bpost also operates e-commerce logistics through subsidiaries in Europe and North America.

Industry: Postal & Parcel Delivery Services
Address: Centre Monnaie / Muntcentrum, 1000 Brussels, Belgium
Employees: 25000
Founded: 1830

Attack summary

Severity: high — bpost is a national postal operator handling significant volumes of personal and business data; confirmed exfiltration and data publication of 30+ GB from a major public-sector-adjacent company constitutes high severity, with likely PII exposure at scale.

TridentLocker claims to have exfiltrated data from bpost, with a published leak of approximately 30.46 GB of data disclosed on 1 December 2025. The disclosed status indicates the data has been published rather than merely threatened.

high

Data the group says was taken

AI dossier — extracted from the leak post

Exfiltrated corporate data (30.46 GB)

Original description

AI-summarised, not from the leak post

bpost is a Belgian company that handles the sorting, collection, transportation and delivery of postal services both locally and internationally. Apart from this, they also manage electronic communications, financial transactions, and other related services. bpost operates in the mail sector as well as in the parcel and e-commerce logistics in Europe, North-America and Asia.

The leak post

captured from the group's site

TridentLocker TridentLocker asiawba Leak date 9.11.2025 Total leak size: 2.7 GB typecaseinc Leak date 15.11.2025 Total leak size: 184.55 GB Calmec Leak date 15.11.2025 Total leak size: 73.91 GB EnQuest Leak date 16.11.2025 Total leak size: 177.44 GB LMG Holdings Leak date 18.11.2025 Total leak size: 27.28 GB iqs Leak date 18.11.2025 Total leak size: 312.77 GB Advantage 360 Leak date 20.11.2025 Total leak size: 73.54 GB GuestTek Leak date 20.11.2025 Total leak size: 126.98 GB bpost Leak date 01.12.2025 Total leak size: 30.46 GB noment Leak date 02.12.2025 Total leak size: 30.9 GB allenprinting Leak date 19.12.2025 Total leak size: 88.28 GB Sedgwick Government Solutions Leak date 30.12.2025 Total leak size: 3.39 GB Eco Green Group Leak date 12.01.2026 Total leak size: 122.5 GB TMPartner Leak date 06.02.2026 Total leak size: 2.8 GB Jameson Pepple Cantu PLLC Leak date 05.03.2026 Total leak size: 178.05 GB RT Software Leak date 26.04.2026 Total leak size: 402.14 GB &times; Edit Article Target: Date: Size: File Count: Archives: Save Changes

Sources

Leak posthttp://tridentfrdy6jydwywfx4vx422vnto7pktao2gyx2qdcwjanogq454ad.onion/article/efbc8b1a-22e9-4a7f-958a-1f37c0ec9cc4

Source

Indexed 8 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About tridentlocker

TridentLocker is a recently emerged ransomware group that was first observed in November 2025, appearing to be financially motivated based on their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear given their recent emergence, with no publicly documented connections to other ransomware operations or confirmed country of origin, though their global targeting suggests they may operate independently rather than as part of an established RaaS model. Limited public documentation exists regarding their specific attack methodology, tools, or encryption methods, though their targeting of technology, public sector, energy, and telecommunication organizations suggests they likely employ sophisticated initial access techniques and may utilize double extortion tactics given the sensitive nature of data in these sectors. With only 15 documented victims across the United States, Canada, Japan, Iraq, and Great Britain, the group has not yet conducted any widely publicized major campaigns or attracted significant law enforcement attention. TridentLocker appears to remain active as of their recent emergence, though comprehensive threat intelligence remains limited due to their brief operational history. The group has been linked to 16 public disclosures across our corpus. First observed on a leak site on November 29, 2025; most recent post April 27, 2026. The operation is currently active.

Timeline of this disclosure

December 1, 2025bpost listed by tridentlockeron the group's public leak site

Other recent disclosures by tridentlocker

tridentlocker has been linked to 16 public victims on Darkfield. A sample of the most recent:

See the full tridentlocker dossier →

Sector and geography

This disclosure adds to ransomware activity in the Telecommunication sector, which has 172 disclosures indexed across all operators we track. Geographically, bpost is reported in Belgium, a country with 44 ransomware disclosures in our corpus.

If your organisation is affected

A listing by tridentlocker means bpost appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CERT.be (Belgium), as required for your jurisdiction.
Monitor for the data appearing on tridentlocker's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.