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Leak-site post naming Mansfield Family Dentistry, captured by ThreatCluster

Mansfield Family Dentistry

everest

Ransomware leak-site victim intelligence · EN

Data size
684 GB DataBase
Files
597,482
Views
63,000
Posted
Jul 23, 2026
Countdown
The files will be published after the timer counts down.
Country
US
Industry
Healthcare

Summary

Written by ThreatClusterfrom file listing, victim profile, leak post, screenshot, ransom note

Everest group claims Mansfield Family Dentistry’s data totaling 683.86 GB across 597,482 files was taken, with the data to be published after a countdown on the leak site. The dataset is described as including dental imaging, office documents, payroll folders, patient forms, insurance materials, Outlook PST files, backups, installers and device/software support files, and data from Eaglesoft, Patterson, Sidexis and Sirona/DICOM. Victim domain is mansfielddentistry.com, and the leak references platforms Eaglesoft, Patterson, Sidexis, Sirona, DICOM and Outlook PST.

Describes what the group claims on its leak site. A listing is not confirmation that a breach occurred.

Victim profile

Domains
mansfielddentistry.com
Platforms
Eaglesoft Patterson Sidexis Sirona DICOM Outlook
People named
Frances Meister John Hoonhorst Kim Rypma Laura Schaut Pamela Batema TARA BERGHUIS KAILEY CLEVELAND LISA MERCIER

What was taken

The dataset contains Mansfield Family Dentistry, Eaglesoft, Patterson, Sidexis, Sirona, DICOM, dental imaging, office documents, payroll folders, patient forms, insurance materials, Outlook PST files, backups, installers and device/software support files.

Data categories
Eaglesoft dataPatterson dataDICOM imagingDental imaging filesOffice documentsPayroll foldersPatient formsInsurance materialsOutlook PST filesBackupsInstallersDevice/software support files
Leak site tags
dentalEaglesoftPattersonSidexisSironaDICOMDICOM imagingOutlook PSTWindows/softwareThree sources
File types seen
db × 39cab × 103dcm × 3,637dll × 1,810eop × 439,700esd × 37,762etp × 76,279exe × 577log × 222mp4 × 25msi × 152pdf × 750wim × 3xml × 9,990zip × 157
Sample files (16)
PattersonPM.db
PattersonPM.log
PattersonAsst.db
PattersonAsst.log
PattersonPM1900.db
PattersonPM1900.log
RadReport_Frances_Meister_031126141242015_MP.pdf
RadReport_John_Hoonhorst_061825155339448_MP.pdf
RadReport_Kim_Rypma_031825191726469_MP.pdf
RadReport_Laura_Schaut_101524133519951_MP.pdf
RadReport_Pamela_Batema_030926201919189_MP.pdf
HIPAA.docx
Hipaa.pdf
Outlook.pst
eaglesoft DATA D.rar
GALILEOSImplantDatabase-1.9.5602.25513.msi

Ransom note

Published by the group on their leak site, reproduced verbatim.

The files will be published after the timer counts down. The company still has time to get in touch with us

Also stated on the leak page

Fields this group publishes that do not map to a standard column. Labels are the site's own.

sources
C:\Users\Office, D:\, E:\
latest_post
Mansfield Family Dentistry Jul 23
timer_message
The files will be published after the timer counts down. The company still has time to get in touch with us
Main Data Locations
1) C:\Users\Office\Desktop 2) C:\Users\Office\Documents 3) C:\Users\Office\Downloads 4) C:\Users\Office\Desktop\TARA BERGHUIS 5) C:\Users\Office\Documents\DICOMRM 6) C:\Users\Office\Desktop\Admin 7) C:\Users\Office\Desktop\New patient p

Leak-site images (11)

Images from the victim's leak listing. Thumbnails scraped from the onion page are blurred by default — click a thumbnail to view.

ThreatCluster capture
onion leak page11 KB
Logo of Keysight Technologies featuring a red waveform graphic and the company name in white text.
onion leak page128 KB
onion leak page11 KB
Logo featuring the text "mansfield" in a stylized font, with "FAMILY DENTISTRY" below it.
onion leak page1.4 KB
Logo featuring a stylized letter "P" in orange with a black play button icon integrated into the design.
onion leak page7.5 KB
onion leak page5.8 KB
Logo featuring the text "Al-Futtaim" in blue, with "automotive" in a smaller font below it, accompanied by a geometric symbol.
onion leak page5.6 KB
Logo featuring stylized figures in orange and blue, with the text "ALZONE" in blue below the figures.
onion leak page7.0 KB
Logo of Emirates Flight Catering, featuring stylized text in gold and red.
onion leak page6.8 KB
Logo of Dharma Group featuring a stylized design with green and blue colors, accompanied by the text "DHARMA GROUP" below it.
onion leak page7.7 KB