Was Mosaic Partners hit by ransomware?

Mosaic Partners was listed by the payload ransomware operation (Switzerland), 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 payload ransomware group?

payload 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 Mosaic Partners breach?

payload published data attributed to Mosaic Partners. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Mosaic Partners

Claimed by Payload · listed 7 days ago

Age

since listed · data leaked

Status timeline

ListedJun 26, 2026
Data leakeddate unknown

At a glance

Group: Payload
Status: Data leaked
Country: Switzerland
Sector: Business Services
Listed on leak site: Jun 26, 2026

About the victim

AI dossier — public-source company profile

Mosaic Partners is a Swiss IT services company (SSII) and systems engineering firm that has operated for over 30 years. It specializes in tailored digital solutions, software development, and business process optimization, with particular expertise in ERP systems, CRM, cloud computing, and industry-specific applications (notably for winemaking, manufacturing, and distribution).

Industry: IT Services & Software Development
Address: Switzerland (contact: +41 27 565.04.77)

Attack summary

Severity: medium — Data has been published and the company operates in a sensitive sector handling client business systems and potentially customer PII. However, no specific data inventory, proof file count, or operational impact is detailed in the leak post. The disclosure is confirmed but the scope and sensitivity remain unclear.

The Payload group claims to have compromised Mosaic Partners and published exfiltrated data. The group's post describes the company's IT services operations but does not explicitly detail what data was encrypted, exfiltrated, or what specific systems were impacted.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business process documentation
ERP system data
CRM customer information
Client project files
Internal development code/intellectual property

What the group claims

The Swiss company Mosaic Partners specializes in providing IT services, software development, and systems engineering. It creates tailored digital solutions and applications to optimize business processes, covering areas such as CRM, cloud computing, and process management (e.g., in winemaking). The company's products are adapted to individual client needs, ensuring easy integration, data security, and rapid customization to meet market demands.

Sources

Source

Indexed 7 days 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 payload

Based on the limited publicly available information, Payload is an emerging ransomware group first observed in February 2026 with a primarily financial motivation, having targeted 19 documented victims across multiple countries and sectors. The group's origin and affiliations remain unclear, with no documented evidence of their operational structure, country of origin, or whether they operate as a Ransomware-as-a-Service model or independent entity. Their attack methodology, encryption techniques, and specific tools used have not been publicly documented by major cybersecurity firms or law enforcement agencies. The group has demonstrated a diverse targeting approach, focusing primarily on victims in the Philippines, United States, United Kingdom, Mexico, and Dominican Republic, with particular emphasis on manufacturing, agriculture and food production, transportation/logistics, and telecommunication sectors, though the specific campaigns and ransom demands remain undisclosed in public threat intelligence reports. Given the group's recent emergence and limited public documentation, Payload appears to be currently active but remains a relatively obscure threat actor with insufficient publicly available data to establish comprehensive intelligence assessments from major cybersecurity organizations or law enforcement agencies. The group has been linked to 65 public disclosures across our corpus. First observed on a leak site on February 17, 2026; most recent post July 2, 2026. The operation is currently active.

Timeline of this disclosure

June 26, 2026Mosaic Partners listed by payloadon the group's public leak site

Other recent disclosures by payload

payload has been linked to 65 public victims on Darkfield. A sample of the most recent:

See the full payload dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Mosaic Partners is reported in Switzerland, a country with 38 ransomware disclosures in our corpus.

If your organisation is affected

A listing by payload means Mosaic Partners 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, NCSC-CH (Switzerland), as required for your jurisdiction.
Monitor for the data appearing on payload'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.