Was LTS Group hit by ransomware?

LTS Group was listed by the worldleaks ransomware operation (Japan), 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 worldleaks ransomware group?

worldleaks 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 LTS Group breach?

worldleaks published data attributed to LTS Group. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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LTS Group

Claimed by Worldleaks · listed 5 months ago

Age

since listed · data leaked

Status timeline

ListedJan 24, 2026
Data leakeddate unknown

At a glance

Group: Worldleaks
Status: Data leaked
Country: Japan
Listed on leak site: Jan 24, 2026

About the victim

AI dossier — public-source company profile

LTS Group is a Vietnam-based IT outsourcing company providing software development, software testing, digital BPO, and AI development services to clients worldwide. The company has been recognized as one of Vietnam's Top 10 ICT Companies in digital BPO for three consecutive years (2023, 2024, and 2025). It serves industries including automotive, construction, BFSI, e-commerce, healthcare, and education.

Industry: IT Outsourcing & Digital BPO Services
Address: Vietnam (headquarters); specific street address not publicly stated)
Employees: 201-500

Attack summary

Severity: medium — Data is marked as published, indicating confirmed exfiltration, but no specific data types, volume, or proof files are described; the AI-generated post misidentifies the company, reducing confidence in the scope of the breach. No regulated PII or critical infrastructure impact is confirmed.

The worldleaks group claims to have published data obtained from LTS Group, with the disclosure status marked as data_published. The leak post description appears AI-generated and misidentifies the victim company, suggesting limited verified detail about the specific data exfiltrated.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Undisclosed company data

Original description

AI-summarised, not from the leak post

LTS Group Inc. is a private company specializing in providing educational and healthcare professionals for schools and centers. Based in New York, US, LTS Group Inc. primarily assists special needs children. Its services include staffing registered nurses, occupational, physical and speech therapists. The firm also offers therapeutic staffing for Special Education settings. LTS Group Inc. additionally helps school administrators and liaisons manage their staff and students effectively.

Sources

Victim siteltsgroup.tech
Leak posthttps://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/4108690578

Source

Indexed 5 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 worldleaks

Based on the limited available data, worldleaks is a recently emerged ransomware group that was first observed in May 2025 and appears to be primarily financially motivated, having claimed 134 victims in a relatively short timeframe since its emergence. The group's origin and organizational structure remain unclear, with no publicly documented information from major cybersecurity firms or law enforcement agencies regarding their country of origin, potential affiliations, or operational model. Their targeting patterns indicate a focus on English-speaking countries, particularly the United States, United Kingdom, and Canada, with additional activity observed in Germany and Japan, while their sector targeting shows a preference for healthcare, technology, manufacturing, and consumer services organizations. Due to the group's recent emergence and limited public documentation by established threat intelligence sources, specific details about their attack methodologies, encryption techniques, extortion tactics, and notable campaigns have not yet been comprehensively analyzed or reported by organizations such as CISA, FBI, or major cybersecurity research firms. The group appears to remain active as of the most recent observations, though comprehensive threat intelligence profiling awaits further analysis and documentation by established cybersecurity authorities. The group has been linked to 167 public disclosures across our corpus. First observed on a leak site on May 18, 2025; most recent post June 11, 2026. The operation is currently active.

Timeline of this disclosure

January 24, 2026LTS Group listed by worldleakson the group's public leak site

Other recent disclosures by worldleaks

worldleaks has been linked to 167 public victims on Darkfield. A sample of the most recent:

See the full worldleaks dossier →

Sector and geography

Geographically, LTS Group is reported in Japan, a country with 108 ransomware disclosures in our corpus.

If your organisation is affected

A listing by worldleaks means LTS Group 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 worldleaks'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.