Skip to content
Cyber Threat
CTI Academy Sponsor CTI Academy
Ransomware victim

CD

Listed by Monti on · organisation based in Japan

cd-custom.com

Disclosed
Mar 19, 2025
Leak-site listing date
Threat group
Monti
63 victims listed
Country
Japan
#11 most targeted
Sector
Not recorded

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

CD was listed by Monti ransomware, a group with 63 victims recorded in this database. The listing appeared on the group's leak site on March 19, 2025.

CD is based in Japan. Japan ranks #11 worldwide for ransomware disclosures, with 294 victims in this database.

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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 CD attacked by ransomware?

Yes. CD was listed as a victim of the Monti ransomware group on March 19, 2025. The organisation is based in Japan. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked CD?

CD 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 CD ransomware attack occur?

The ransomware attack on CD was disclosed on March 19, 2025. 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 CD ransomware attack?

The specific data stolen from CD 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. Sensitive business data was likely targeted.

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.