Was Slimsoft hit by ransomware?

Slimsoft was listed by the Spacebears ransomware operation (Israel), 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 Spacebears ransomware group?

Spacebears 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 Slimsoft breach?

Spacebears published data attributed to Slimsoft. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Slimsoft

Claimed by Spacebears · listed 7 months ago

Age

since listed · data leaked

Status timeline

ListedDec 5, 2025
Data leakeddate unknown

At a glance

Group: Spacebears
Status: Data leaked
Country: Israel
Listed on leak site: Dec 5, 2025

About the victim

AI dossier — public-source company profile

Slimsoft (סלימסופט) is an Israeli software solutions company with over 25 years of experience developing custom software and websites tailored to client needs. The company offers both off-the-shelf and bespoke solutions, including cloud backup services, covering the full lifecycle from requirements analysis through deployment and ongoing support. It appears to be a small, locally focused firm serving Israeli clients.

Industry: Custom Software Development & Web Solutions

Attack summary

Severity: medium — Data is marked as published, indicating exfiltration has occurred, but no details on data type, volume, or sensitivity are provided, and the leak post content appears mismatched with the actual victim, limiting confidence in the scope of the breach.

The Spacebears ransomware group has published data claimed to be from Slimsoft under a disclosed status of 'data_published'; notably, the group's leak post text describes Johnson & Johnson Innovative Medicine rather than Slimsoft, suggesting possible misattribution or deliberate obfuscation. No specific data categories, ransom amount, or data size were stated.

medium

What the group claims

Software and website developmentOver 25 years of experience in developing software and websites according to customer needs and requirements, while providing existing solutions or building according to customer needs and requirementsSQLOther https://slimsoft.co.il/

The leak post

captured from the group's site

## Johnson & Johnson Innovative Medicine
Johnson & Johnson Innovative Medicine (formerly known as Janssen Pharmaceuticals) is the pharmaceutical division of the American corporation Johnson & Johnson, specializing in the development and production of revolutionary medicines. The company focuses on creating treatments for the most complex diseases, transforming the future of healthcare.

Sources

Victim siteslimsoft.co.il
Leak posthttp://5butbkrljkaorg5maepuca25oma7eiwo6a2rlhvkblb4v6mf3ki2ovid.onion/companies/101/slimsoft

Source

Indexed 7 months 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 Spacebears

Spacebears is a recently emerged ransomware group first observed in April 2024, operating with apparent financial motivations and demonstrating a broad targeting approach across multiple sectors and geographic regions. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their targeting pattern suggests a professional operation focused on maximizing financial returns rather than geopolitical objectives. With 117 known victims since their emergence, Spacebears has shown particular focus on organizations in the United States, Germany, Spain, Italy, and Canada, with their attacks primarily affecting technology, healthcare, manufacturing, and business services sectors, indicating they likely employ opportunistic targeting rather than sector-specific specialization. Their attack methodology, initial access vectors, and specific technical capabilities have not been extensively documented in public reporting from major cybersecurity firms or law enforcement agencies, limiting detailed analysis of their operational procedures and tools. Due to the group's recent emergence and limited public intelligence reporting, notable high-profile campaigns and specific victim details remain largely undocumented in established threat intelligence channels. The group's current operational status appears active given their recent emergence timeline, though comprehensive analysis is constrained by the lack of detailed public reporting from authoritative cybersecurity sources. The group has been linked to 185 public disclosures across our corpus. First observed on a leak site on April 29, 2024; most recent post July 13, 2026. The operation is currently active.

Also tracked as: space bears.

Timeline of this disclosure

December 5, 2025Slimsoft listed by Spacebearson the group's public leak site

Other recent disclosures by Spacebears

Spacebears has been linked to 185 public victims on Darkfield. A sample of the most recent:

See the full Spacebears dossier →

Sector and geography

Geographically, Slimsoft is reported in Israel, a country with 156 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Spacebears means Slimsoft 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, CERT-IL (Israel), as required for your jurisdiction.
Monitor for the data appearing on Spacebears'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.