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Semilab

Claimed by Dan0N · listed 2 years ago

1.47 TB
Data size
27m
Age
since listed · data leaked

Status timeline

  1. ListedApr 25, 2024
  2. Data leakeddate unknown

At a glance

Group
Dan0N
Status
Data leaked
Country
United States
Sector
Technology
Listed on leak site
Apr 25, 2024
Data size
1.47 TB

About the victim

AI dossier — public-source company profile

Semilab is a semiconductor metrology company specializing in research and development tools for material sciences, semiconductor, photovoltaic, and display industries. The company is the 5th largest pure-play semiconductor metrology provider globally, offering products ranging from handheld devices to fully automated testing solutions. Semilab operates internationally with a US subsidiary (Semilab USA LLC).

Industry
Semiconductor Metrology & Testing Equipment

Attack summary

Severity: high — Confirmed exfiltration of 1.47 TB including financial, legal, employee, partner, and client data representing significant business and personal information exposure. Data already published with no ransom demand indicates operational compromise.

Dan0N claims to have exfiltrated 1.47 TB of data from Semilab, including financial records, legal documents, employee and partner information, and client data. The group has published the stolen data without requesting ransom.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Financial records
  • Legal documents
  • Employee information
  • Partner information
  • Client data

What the group claims

The total size of stolen information is 1.47TB. This leak contains corporate information of the company: Financial, legal, information on employees and partners. Information on clients was also receiv

Sources

Source

Indexed 2 years 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 Dan0N

Dan0N is an emerging ransomware group that first appeared in April 2024, operating with primarily financial motivations and demonstrating a focused targeting approach across multiple sectors. Based on limited public information, the group's origin and affiliations remain unclear, with insufficient data to determine whether they operate as an independent entity or as part of a Ransomware-as-a-Service model. The group has demonstrated capability to compromise organizations across diverse sectors including business services, technology, healthcare, and financial services, though specific attack vectors and technical methodologies have not been extensively documented by major security research organizations. Dan0N has maintained a relatively low profile compared to established ransomware operations, with 33 documented victims primarily concentrated in the United States, Ireland, and South Korea, suggesting either targeted regional focus or opportunistic attacks against accessible infrastructure in these countries. The group appears to remain active as of current reporting, though the limited public documentation from established threat intelligence sources indicates they have not yet achieved the notoriety or scale of operations that would trigger significant law enforcement attention or comprehensive technical analysis from major security firms. The group has been linked to 33 public disclosures across our corpus. First observed on a leak site on April 25, 2024; most recent post August 23, 2024. The operation is currently inactive.

Timeline of this disclosure

  • April 25, 2024Semilab listed by Dan0Non the group's public leak site
Data size
1.47 TB

Other recent disclosures by Dan0N

Dan0N has been linked to 33 public victims on Darkfield. A sample of the most recent:

See the full Dan0N dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, Semilab is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Dan0N means Semilab 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.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Dan0N'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.