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Cyber Threat
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Ransomware victim Professional Services

Zenidoc

Listed by Panzer on

Disclosed
Oct 13, 2026
Leak-site listing date
Threat group
Panzer
55 victims listed
Country
Unknown
Sector
Professional Services

ThreatAI analysis

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

Panzer listed professional services firm Zenidoc on its dark web leak site on 13 October, the first time Zenidoc's involvement was publicly known.

About the Panzer group

Panzer has listed 39 victims since August 2026.

Vulnerabilities Panzer is recorded exploiting

4 of these 4 are in the CISA Known Exploited Vulnerabilities catalog, 4 of them recorded by CISA as used in ransomware campaigns. CVEs attributed to Panzer across its reported activity. There is no indication that any of these was involved in the Zenidoc incident — the source data does not record an entry point.

Incident analysis

Zenidoc was listed by Panzer ransomware, a group with 55 victims recorded in this database. The listing appeared on the group's leak site on October 13, 2026.

Sector context. Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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

Yes. Zenidoc was listed as a victim of the Panzer ransomware group on October 13, 2026 and operates in the Professional Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Zenidoc?

Zenidoc was attacked by Panzer ransomware. Panzer is one of the most active ransomware groups, having claimed 55 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Zenidoc ransomware attack occur?

The ransomware attack on Zenidoc was disclosed on October 13, 2026. 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 Zenidoc ransomware attack?

The specific data stolen from Zenidoc 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 Professional Services organisation, Zenidoc likely held sensitive business data, client information, and operational records.

How can organisations protect against Panzer attacks?

To defend against Panzer 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.