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Cyber Threat
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Ransomware victim Healthcare

Diablo Valley Oncology and Hematology Medical Group - Press Release

Listed by Monti on · organisation based in United States

dvohmg.com

Disclosed
Jan 4, 2024
Leak-site listing date
Threat group
Monti
63 victims listed
Country
United States
#1 most targeted
Sector
Healthcare

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Monti. Figures and technique mappings are quoted from the source data, not inferred.

About the Monti group

Monti is a ransomware group first observed in June 2022 that initially copied nearly all of Conti's leaked source code, pivoting to target government, legal, and healthcare entities, later releasing a new Linux variant in 2023 with significantly less Conti code similarity, and experimenting with an affiliate model. Monti has listed 110 victims since December 2022.

Incident analysis

Diablo Valley Oncology and Hematology Medical Group - Press Release was listed by Monti ransomware, a group with 63 victims recorded in this database. The listing appeared on the group's leak site on January 4, 2024.

Diablo Valley Oncology and Hematology Medical Group - Press Release is based in United States and operates in the Healthcare sector. United States ranks #1 worldwide for ransomware disclosures, with 10,138 victims in this database.

Sector context. Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Monti typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Diablo Valley Oncology and Hematology Medical Group - Press Release attacked by ransomware?

Yes. Diablo Valley Oncology and Hematology Medical Group - Press Release was listed as a victim of the Monti ransomware group on January 4, 2024. The organisation is based in United States and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Diablo Valley Oncology and Hematology Medical Group - Press Release?

Diablo Valley Oncology and Hematology Medical Group - Press Release was attacked by Monti ransomware. Monti is one of the most active ransomware groups, having claimed 63 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Diablo Valley Oncology and Hematology Medical Group - Press Release ransomware attack occur?

The ransomware attack on Diablo Valley Oncology and Hematology Medical Group - Press Release was disclosed on January 4, 2024. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Diablo Valley Oncology and Hematology Medical Group - Press Release ransomware attack?

The specific data stolen from Diablo Valley Oncology and Hematology Medical Group - Press Release has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Healthcare organisation, Diablo Valley Oncology and Hematology Medical Group - Press Release likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Monti attacks?

To defend against Monti and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.