Was BDO Greece hit by ransomware?

BDO Greece was listed by the thegentlemen ransomware operation (Greece), 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 thegentlemen ransomware group?

thegentlemen 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 BDO Greece breach?

thegentlemen published data attributed to BDO Greece. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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BDO Greece

Claimed by Thegentlemen · listed 4 days ago

Age

since listed · data leaked

Status timeline

ListedJul 11, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Greece
Sector: Business Services
Listed on leak site: Jul 11, 2026

About the victim

AI dossier — public-source company profile

BDO Greece is an Athens-based accounting, tax, and advisory firm operating as a member of the global BDO network. The firm provides audit, assurance, and business consulting services to clients across real estate, hospitality, and the public sector, with an estimated annual revenue exceeding $23 million.

Industry: Accounting, Tax & Advisory Services
Employees: 50-200

Attack summary

Severity: medium — BDO Greece handles sensitive client financial, tax, and audit data; however, the leak post provides no explicit proof files, data size estimates, or detailed confirmation of exfiltration. The disclosure status is 'data_published' but without quantified proof or specifics on regulated data exposure, severity is assessed as medium rather than high.

thegentlemen claims to have attacked BDO Greece and published data. The group's post does not explicitly specify whether encryption, exfiltration, or both occurred, nor does it detail the specific data categories involved.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Client financial records
Tax documentation
Audit files
Business consulting materials

What the group claims

***.gr zoominfo.com/c/bdo-certified-public-accountants-sa/372555588 BDO Greece is a leading Athens-based accounting, tax, and advisory firm that operates as a member of the global BDO network. The company provides comprehensive audit, assurance, and business consulting services to a diverse range of industries, including real estate, hospitality, and the public sector. Employing between 50 and 200 professionals, the firm generates an estimated annual revenue of over $23 million while helping clients navigate complex financial and regulatory landscapes

Sources

Victim sitebdo.gr

Source

Indexed 4 days 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 599 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 11, 2026BDO Greece listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 599 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, BDO Greece is reported in Greece, a country with 3 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means BDO Greece 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.
Monitor for the data appearing on thegentlemen'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.