Was chroma.com.tw hit by ransomware?

chroma.com.tw was listed by the warlock ransomware operation (Taiwan), 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 warlock ransomware group?

warlock 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 chroma.com.tw breach?

warlock published data attributed to chroma.com.tw. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Chroma ATE Inc.

listed as chroma.com.tw · Claimed by Warlock · listed 9 months ago

Age

since listed · data leaked

Status timeline

ListedSep 16, 2025
Data leakeddate unknown

At a glance

Group: Warlock
Status: Data leaked
Country: Taiwan
Sector: Technology
Listed on leak site: Sep 16, 2025

About the victim

AI dossier — public-source company profile

Chroma ATE Inc. is a Taiwanese manufacturer specialising in precision test and measurement instruments, automated test equipment, and power electronics testing solutions. The company serves sectors including semiconductors, electronics, electric vehicles, and renewable energy, with operations and subsidiaries across Asia, Europe, and North America. It is publicly listed on the Taiwan Stock Exchange.

Industry: Automatic Test Equipment (ATE) Manufacturing
Address: No. 66, Hwa-Ya 1st Road, Hwa-Ya Technology Park, Guishan District, Taoyuan City 33383, Taiwan
Employees: 1001-5000
Founded: 1998

Attack summary

Severity: high — The group claims full data publication ('all data') against a publicly listed technology manufacturer involved in critical semiconductor and EV supply chains; confirmed data_published status suggests exfiltration and release of significant business data, though no confirmed PII or regulated data categories are itemised.

The Warlock ransomware group claims to have published all exfiltrated data from Chroma ATE Inc., indicating both potential exfiltration and disclosure of company data, though no specific data categories or volume are detailed in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

All company data (unspecified)

What the group claims

all data

Sources

Victim sitechroma.com.tw

Source

Indexed 9 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About warlock

Warlock is an emerging ransomware group that first appeared in June 2025, primarily motivated by financial gain through extortion operations targeting organizations across multiple sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their targeting pattern spans both Western nations and Russia, suggesting possible opportunistic rather than geopolitically-motivated operations. Based on available victim data, Warlock has demonstrated capability to compromise organizations across diverse sectors including technology, financial services, telecommunications, and healthcare, with their attack methodology and technical capabilities requiring further analysis by security researchers to establish definitive patterns regarding initial access vectors, encryption methods, or data exfiltration tactics. While the group has accumulated 78 documented victims across the United States, Japan, Russia, Great Britain, and Turkey within their initial months of operation, insufficient public reporting from CISA, FBI, or major security firms exists to detail specific notable campaigns, ransom demands, or high-profile incidents. Given the group's recent emergence in mid-2025, their current operational status and potential evolution remain under observation by the cybersecurity community. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on June 11, 2025; most recent post November 6, 2025. The operation is currently inactive.

Timeline of this disclosure

September 16, 2025chroma.com.tw listed by warlockon the group's public leak site

Other recent disclosures by warlock

warlock has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full warlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,544 disclosures indexed across all operators we track. Geographically, chroma.com.tw is reported in Taiwan, a country with 52 ransomware disclosures in our corpus.

If your organisation is affected

A listing by warlock means chroma.com.tw 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 warlock'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.