Was Hooke Laboratories hit by ransomware?

Hooke Laboratories was listed by the thegentlemen ransomware operation (United States), 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 thegentlemen ransomware group?

thegentlemen 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 Hooke Laboratories breach?

thegentlemen published data attributed to Hooke Laboratories. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Hooke Laboratories, Inc.

listed as Hooke Laboratories · Claimed by Thegentlemen · listed 2 days ago

Age

since listed · data leaked

Status timeline

ListedJul 1, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: United States
Sector: Technology
Listed on leak site: Jul 1, 2026

About the victim

AI dossier — public-source company profile

Hooke Laboratories is a biotechnology company based in Lawrence, Massachusetts that specializes in biological products for preclinical medical and pharmaceutical research. The company is known for its Hooke Kits™, ready-to-use emulsions used to induce animal models of autoimmune diseases in laboratory rodents. They operate exclusively as a preclinical research supplier working with rodents and in vitro models, with no human clinical products.

Industry: Biotechnology & Preclinical Research Supplies
Address: Lawrence, Massachusetts, US

Attack summary

Severity: low — The leak post contains only company descriptive information without explicit claims of data exfiltration, proof files, or operational disruption. No specific sensitive data types are mentioned as compromised.

The ransomware group claims to have compromised Hooke Laboratories and published data. The post provides company description but does not explicitly state what data was exfiltrated or encrypted, nor does it detail the scope of the breach.

low

What the group claims

***.com zoominfo.com/c/hooke-laboratories-inc/345976723 Hooke Laboratories is a biotechnology company based in Lawrence, Massachusetts, specializing in biological products for medical and pharmaceutical research.They are best known for their "Hooke Kits™," which are ready-to-use emulsions used to induce animal models of autoimmune diseases, such as EAE, in laboratory rodents.The company operates strictly as a preclinical research supplier, working only with rodents and in vitro, and does not offer any products for human clinical use

Sources

Victim sitehookelabs.com

Source

Indexed 2 days 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 559 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 1, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 1, 2026Hooke Laboratories listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 559 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,545 disclosures indexed across all operators we track. Geographically, Hooke Laboratories is reported in United States, a country with 3,107 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Hooke Laboratories 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 thegentlemen'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.