Was Tan Chong Motor Holdings Berhad hit by ransomware?

Tan Chong Motor Holdings Berhad was listed by the crypto24 ransomware operation (Malaysia), 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 crypto24 ransomware group?

crypto24 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 Tan Chong Motor Holdings Berhad breach?

crypto24 published data attributed to Tan Chong Motor Holdings Berhad (~300 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Tan Chong Motor Holdings Berhad

Claimed by Crypto24 · listed 1 year ago

300 GB

Data size

12m

Age

since listed · data leaked

Status timeline

ListedJul 16, 2025
Data leakeddate unknown

At a glance

Group: Crypto24
Status: Data leaked
Country: Malaysia
Sector: Manufacturing
Listed on leak site: Jul 16, 2025
Data size: 300 GB

About the victim

AI dossier — public-source company profile

Tan Chong Motor Holdings Berhad is a Malaysian investment holding company principally engaged in assembly and distribution of motor vehicles, after-sales services, and financial services including insurance and hire-purchase. Listed on Bursa Malaysia with shareholders' equity of RM2.61 billion as of December 2025.

Industry: Automotive Assembly, Distribution & Financial Services
Address: 62-68, Jalan Sultan Azlan Shah, 51200 Kuala Lumpur, Wilayah Persekutuan, Malaysia
Founded: 1972

Attack summary

Severity: critical — Confirmed exfiltration and publication of 300 GB including customer PII at scale, financial records, HR data, and operational system databases of a major publicly-listed company. Affects a large customer base across automotive and financial services.

crypto24 claims to have exfiltrated over 300 GB of sensitive data including customer databases (NAV, BRASSTAX, VTS, CRM, E-INVOICE systems), legal documents, HR records, financial statements, and contractual documents with partners and customers. Data has been published.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Customer databases (NAV, BRASSTAX, VTS, CRM, E-INVOICE)
Legal documents
HR and employee records
Financial records
Contractual documents with partners and customers

What the group claims

We have exfiltrated over 300GB of sensitive data, including Customer databases (all dbs of tanchong - NAV, BRASSTAX, VTS, CRM, E-INVOICE,...),Legal and HR documents, Financial and employee records, Contractual documents with partners and customers.

Sources

Victim sitetanchonggroup.com

Source

Indexed 1 year 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 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

July 16, 2025Tan Chong Motor Holdings Berhad listed by crypto24on the group's public leak site

Data size: 300 GB

Other recent disclosures by crypto24

crypto24 has been linked to 49 public victims on Darkfield. A sample of the most recent:

See the full crypto24 dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, Tan Chong Motor Holdings Berhad is reported in Malaysia, a country with 40 ransomware disclosures in our corpus.

If your organisation is affected

A listing by crypto24 means Tan Chong Motor Holdings Berhad 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 crypto24'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.