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

November 15, 2025Bayu Buana Travel Service listed by crypto24on the group's public leak site

Data size: 500 GB

Sector and geography

This disclosure adds to ransomware activity in the Hospitality and Tourism sector, which has 159 disclosures indexed across all operators we track. Geographically, Bayu Buana Travel Service is reported in ID, a country with 23 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

← All victims

Bayu Buana Travel Service

Claimed by crypto24 · listed 6 months ago

500 GB

Data size

Age

since listed · data leaked

Status timeline

Listed
Nov 15, 2025
Data leaked

At a glance

Group: crypto24
Status: Data leaked
Country: ID
Sector: Hospitality and Tourism
Listed on leak site: Nov 15, 2025
Data size: 500 GB

About the victim

AI dossier — public-source company profile

Bayu Buana Travel Services is an Indonesian travel and tour operator headquartered in Jakarta, offering packaged tours to destinations across Europe, Asia, Australia, the Americas, Africa, and the Middle East. The company provides both leisure and group travel packages and operates a customer-facing online booking platform. It is a well-known retail travel brand in Indonesia with hundreds of tour products listed across multiple regions.

Industry: Travel & Tour Operator Services
Address: Jakarta, Indonesia

Attack summary

Severity: high — 500 GB of confirmed exfiltrated data including customer PII (names, travel bookings, contact details) and internal business documents from a consumer-facing travel operator constitutes significant data exposure at scale; data has been published, elevating severity beyond medium.

The group crypto24 claims to have exfiltrated over 500 GB of data from Bayu Buana Travel Services' internal network, including internal company documents, customer information, and project data. The disclosure status indicates the data has been published.

high

Data the group says was taken

AI dossier — extracted from the leak post

Internal company documents
Customer information
Project information
Data stored within internal systems

What the group claims

We have successfully extracted over 500GB of documents from your internal network, including internal company documents, customer and project information, and other data stored within your internal systems.

Sources

Victim sitewww.bayubuanatravel.com

Source

Indexed 6 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.