Summary
On October 1, 2025, the ransomware group Sinobi publicly claimed responsibility for an attack targeting
Calsoft Systems (calsoftsystems.com), a U.S.-based company specializing in business technology solutions.
According to the threat actor’s post, they intend to release sensitive data unless negotiations are initiated.
Incident Report
| Field | Details |
|---|---|
| Target | Calsoft Systems |
| Domain | calsoftsystems.com |
| Country | USA |
| Attacking Group | Sinobi |
| Date Reported | October 1, 2025 |
| Threat Actor Statement | “The full leak will be published soon, unless a company representative contacts us via the channels provided.” |
Calsoft Systems is renowned for its expertise in implementing ERP systems like Microsoft Dynamics 365, serving industries such as distribution, logistics, manufacturing, and travel. As a Microsoft Gold Certified partner, they have been pivotal in enabling clients to leverage enterprise systems to their fullest potential.
Sinobi is a notorious ransomware group known for targeting businesses with sophisticated cyber-attacks, often leading to significant data breaches and operational disruptions.
Proactive Response to Ransomware Threats
Organizations can mitigate the risks of such ransomware attacks through proactive measures, including regular dark web monitoring. Identifying potential threats early can prevent data breaches and minimize damage.
Utilize tools like the Domain Breach Scan to monitor your company’s exposure on the dark web. This service helps you stay ahead of potential threats and secure your business data effectively.
Recommendations
- Monitor your domains and email addresses for exposure using reputable threat intelligence tools.
- Conduct a full compromise assessment and incident response drill internally.
- Verify backups and ensure they are offline and ransomware-resistant.
- Educate staff on phishing, social engineering, and lateral movement techniques used by groups like Qilin.
- Engage with cyber forensics and legal counsel before initiating contact with threat actors.
Check Your Exposure
Wondering if your organization or employees are impacted by recent breach activity?
-
Check domain-wide breach exposure:
mspdarkintel.com/domain-breach-scan -
Check if an email was breached:
mspdarkintel.com/email-breach-scan
Disclaimer
The MSPDarkIntel team does not engage in the exfiltration, downloading, taking, hosting, viewing, reposting, or disclosure of any stolen information.
All breach data reported here is sourced from publicly available threat intelligence feeds for awareness and early-warning purposes only.
Our goal is to inform organizations of emerging threats so they can take timely defensive action.
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