Disclosure context

About crypto24

Crypto24 is a recently emerged ransomware group first observed in April 2025, with a primary financial motivation evidenced by their targeting of high-value sectors across multiple geographic regions. The group's origin and affiliations remain unclear due to their recent emergence, though their targeting pattern suggests either independent operations or a new ransomware-as-a-service offering given the diverse geographic spread of their 43 documented victims. Their attack methodology and specific technical capabilities have not yet been thoroughly documented by major threat intelligence providers, though their targeting of technology, financial services, healthcare, and business services sectors indicates they likely employ common initial access vectors such as phishing or exploitation of public-facing applications to gain entry into victim networks. The group has demonstrated a preference for targeting organizations primarily in the United States while also conducting operations across Southeast Asia including Malaysia, Singapore, and Indonesia, as well as extending their reach to Egypt, suggesting either a globally distributed affiliate network or opportunistic targeting based on vulnerable infrastructure discovery. Crypto24 remains active as of the latest available intelligence reporting, though given their recent emergence, comprehensive details about their specific tactics, techniques, and procedures await further analysis by established cybersecurity research organizations. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 8, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

January 21, 2026Yource Bulgaria & Greece listed by crypto24on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Yource Bulgaria & Greece is reported in BG, a country with 2 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Yource Bulgaria & Greece

Claimed by crypto24 · listed 4 months ago

Age

since listed · data leaked

Status timeline

Listed
Jan 21, 2026
Data leaked

At a glance

Group: crypto24
Status: Data leaked
Country: BG
Sector: Not Found
Listed on leak site: Jan 21, 2026

About the victim

AI dossier — public-source company profile

Yource Bulgaria & Greece is a nearshore BPO and contact center services provider headquartered in Sofia, Bulgaria, with additional operations across Greece (including Thessaloniki). With over 20 years of experience, the company delivers customer care, sales, and data & specialised services to major international clients across multiple European markets.

Industry: Business Process Outsourcing & Contact Center Services
Address: Garitage Park, Vitosha, Sofia, Bulgaria; Vakchou 1, 546 29 Thessaloniki, Greece

Attack summary

Severity: critical — Data has been published (not merely threatened), and the exfiltrated material includes PII-rich HR and customer datasets spanning multiple major European client organisations, representing large-scale regulated personal data exposure across multiple jurisdictions under GDPR.

The group claims to have exfiltrated internal data from Yource Bulgaria & Greece, including HR, customer, financial, and project-related records, as well as client datasets linked to named organisations such as Eneco Belgium, bofrost, essent.be, Media Competence, Sodexo, and Spotzer; the disclosed status indicates the data has been published.

critical

Data the group says was taken

AI dossier — extracted from the leak post

HR records
Customer data
Financial data
Project-related information
Client engagement datasets (Eneco Belgium)
Client engagement datasets (bofrost)
Client engagement datasets (essent.be)
Client engagement datasets (Media Competence)
Client engagement datasets (Sodexo)
Client engagement datasets (Spotzer)

What the group claims

Yource Bulgaria & Greece is a customer experience and contact center services provider supporting major international clients, handling large volumes of sensitive personal and business data across its operations in Bulgaria and Greece. We possess internal data belonging to Yource Bulgaria & Greece, including HR, customer, financial, and project-related information, as well as customer datasets associated with client engagements involving organizations such as Eneco Belgium, bofrost, essent.be, Media Compentence, Sodexo, and Spotzer.

Sources

Victim sitewww.yourcebulgaria.cc

Source

Indexed 4 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.