Was Bernath & Rosenberg hit by ransomware?

Bernath & Rosenberg was listed by the genesis 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 genesis ransomware group?

genesis 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 Bernath & Rosenberg breach?

genesis published data attributed to Bernath & Rosenberg. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Bernath & Rosenberg

Claimed by Genesis · listed 1 day ago

Age

since listed · data leaked

Status timeline

ListedSep 14, 2026
Data leakeddate unknown

At a glance

Group: Genesis
Status: Data leaked
Country: United States
Sector: Professional Services
Listed on leak site: Sep 14, 2026

About the victim

AI dossier — public-source company profile

Bernath & Rosenberg is an accounting firm offering a full range of accounting, tax, and financial services to business clients. No further public details are available.

Industry: Accounting & Tax Services

Attack summary

Severity: critical — Confirmed exfiltration of highly sensitive regulated data at scale: client financial records, tax data, payroll information for multiple companies, and contractual documents. This represents material PII and financial data exposure affecting multiple third parties.

The group claims to have exfiltrated 4.5 TB of data from the company's file servers, including accounting records, financial and tax data belonging to the firm's clients, payroll information, contracts, NDAs, and internal management folders.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Accounting data
Financial and tax records (client)
Payroll data (multiple companies)
Contracts and NDAs
Property management data
Network user folders
Management folders

What the group claims

A full service CPA firm

The leak post

captured from the group's site

An accounting firm that provides a full range of services.

```
- 4.5 Tb of accessible data.
- Accounting Data.
- Financial and Tax Data of Company Clients.
- Payroll Data of Various companies
- Contracts and Non-disclosure Agreements. 
- Property Management Data. 
- Network users folders. 
- Management folders. 
- Data exfiltrated from company file servers.

```

Sources

Victim site.
Leak posthttp://genesis6ixpb5mcy4kudybtw5op2wqlrkocfogbnenz3c647ibqixiad.onion/90ce0b64cdc3c528b622/

Source

Indexed 1 day 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 genesis

Genesis is a recently emerged ransomware group that was first observed in October 2025, operating with apparent financial motivations based on their targeting patterns across multiple high-value sectors. The group has demonstrated a relatively aggressive operational tempo since emergence, accumulating 54 documented victims within a short timeframe. Given the limited public documentation available from established threat intelligence sources regarding this newly identified group, specific details about their country of origin, organizational structure, and precise attack methodologies remain under investigation by security researchers. The group's targeting patterns indicate a preference for victims in the United States and United Kingdom, with additional activity observed in Malaysia and Spain, suggesting either a broad operational scope or the use of automated targeting tools that do not discriminate by geography. Their sector targeting reveals a focus on healthcare, manufacturing, business services, and financial services organizations, indicating they may prioritize entities with both high revenue potential and critical operational dependencies that increase pressure for ransom payment. Due to the group's recent emergence and limited reporting from major threat intelligence organizations such as Mandiant, CISA, or FBI, comprehensive details regarding their specific encryption methods, initial access vectors, data exfiltration practices, or notable high-profile campaigns have not yet been publicly documented. Genesis remains an active threat as of current reporting, though their operational longevity and potential connections to established ransomware ecosystems continue to be assessed by the cybersecurity community. The group has been linked to 125 public disclosures across our corpus. First observed on a leak site on October 21, 2025; most recent post September 14, 2026. The operation is currently active.

Timeline of this disclosure

September 14, 2026Bernath & Rosenberg listed by genesis on the group's public leak site

Other recent disclosures by genesis

genesis has been linked to 125 public victims on Darkfield. A sample of the most recent:

See the full genesis dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Services sector, which has 17 disclosures indexed across all operators we track. Geographically, Bernath & Rosenberg is reported in United States, a country with 3,165 ransomware disclosures in our corpus.

If your organisation is affected

A listing by genesis means Bernath & Rosenberg 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 genesis'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.