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Cytek Biosciences

Claimed by Cmdorganization · listed 2 months ago

2m
Age
since listed · data leaked

Status timeline

  1. ListedMay 2, 2026
  2. Data leakeddate unknown

At a glance

Group
Cmdorganization
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
May 2, 2026

About the victim

AI dossier — public-source company profile

Cytek Biosciences is a publicly traded (NASDAQ: CTKB, since 2021) biotechnology company headquartered in Fremont, California, that develops and manufactures full-spectrum flow cytometry instruments, reagents, and software used by researchers and clinicians worldwide. Its product portfolio includes the Aurora, Northern Lights, and Orion instrument families, along with proprietary reagents and cloud-based analysis software. The company serves applications in immuno-oncology, infectious disease, leukemia and lymphoma diagnosis, and transplant monitoring.

Industry
Biotechnology — Flow Cytometry Instruments & Life Science Tools
Address
47215 Lakeview Blvd, Fremont, California 94538, US
Employees
201-500
Founded
2014

Attack summary

Severity: critical — 7.36 TB of data has been published from a NASDAQ-listed healthcare/biotech company operating in clinical diagnostics (leukemia, lymphoma, transplant monitoring). The scale of exfiltration and the company's involvement in clinical applications strongly implies regulated data (patient-adjacent clinical data, PII, financial records) is at risk at significant volume.

The group cmdorganization claims to have exfiltrated 7.36 TB of data from Cytek Biosciences; the disclosure status is listed as data_published, indicating the stolen data has been released or made available. No ransom amount was stated.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Exfiltrated corporate data (7.36 TB)
  • Potentially proprietary R&D and instrument design data
  • Potentially customer and clinical researcher records
  • Potentially financial and business records
  • Potentially employee PII

What the group claims

A biotechnology firm that develops and supplies advanced, cost-effective flow cytometry instruments and related services used worldwide by researchers and clinicians. Its compact systems and streamlined workflows enable high-throughput, single-cell analysis for applications such as cancer immunology, leukemia and lymphoma diagnosis, and transplant monitoring. Distinguished by offering high-end capabilities at lower cost, the company accelerates scientific discovery through technical innovation, exceptional customer support, and a commitment to ethical practices and community engagement. Headquartered in Fremont, California, it has been publicly traded on NASDAQ since 2021. We have 7.36 TB of downloaded data.

Sources

Source

Indexed 2 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 cmdorganization

Based on the limited available information, cmdorganization is an obscure ransomware group first observed in May 2026 with only three documented victims to date, suggesting either a newly emerged threat actor or a small-scale operation with primarily financial motivations. The group's targeting pattern shows a geographic focus on Canada, the United States, and Italy, with a sectoral preference for healthcare and construction industries, though the limited victim count makes it difficult to establish definitive targeting criteria. Due to the recent emergence and low victim count, there is insufficient publicly documented information from major cybersecurity firms or law enforcement agencies regarding their specific attack methodologies, encryption techniques, or operational structure. No notable high-profile campaigns or significant ransoms have been publicly reported for this group, likely due to their limited operational scope and recent emergence. Current intelligence suggests the group remains active but operates at a relatively small scale compared to established ransomware families. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on May 2, 2026; most recent post July 14, 2026. The operation is currently active.

Also tracked as: cmd organization.

Timeline of this disclosure

  • May 2, 2026Cytek Biosciences listed by cmdorganizationon the group's public leak site

Other recent disclosures by cmdorganization

cmdorganization has been linked to 36 public victims on Darkfield. A sample of the most recent:

See the full cmdorganization dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, Cytek Biosciences is reported in United States, a country with 3,115 ransomware disclosures in our corpus.

If your organisation is affected

A listing by cmdorganization means Cytek Biosciences 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 cmdorganization'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.