Siem Srl Listed by spacebears Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Siem Srl was listed by the spacebears ransomware group on February 13, 2026, following the exfiltration of internal files in a ransomware attack that affected an undisclosed number of people. Individuals who may have had dealings with Siem Srl should verify whether their data has been exposed and take appropriate protective steps.
What happened
The incident centers on a claim by spacebears that it obtained internal files from Siem Srl. The group added the company to its leak-site listing on February 13, 2026. No official statement from Siem Srl or its parent company Kalisa Holding Srl has been referenced in available reports, and the exact timing of the intrusion, the volume of data taken, or the encryption status of systems has not been disclosed.
The group behind it: spacebears
Spacebears is a ransomware operator that follows the common pattern of exfiltrating data before deploying encryption, then posting victim names on a dedicated leak site to pressure organizations into paying. The group’s listings function as public claims rather than independently verified incidents. Its activity aligns with other ransomware actors that target mid-sized industrial and infrastructure-related firms, though specific prior operations involving Siem Srl or Kalisa Holding have not been documented in connection with this listing.
Siem Srl and its sector
Siem Srl develops equipment for energy management, monitoring, and protection of electrical systems. It supplies solutions to major airports and civil-industrial facilities, with an emphasis on integrating renewable sources and maintaining operational reliability. As part of Kalisa Holding Srl, the company handles technical data tied to critical infrastructure projects, a sector where unauthorized access to design and operational information can affect both commercial relationships and physical systems.
What data was at risk
The listing references internal files exfiltrated in the attack. Named categories include customer contracts, financial reports, customer drawings for factories and airports, and employee personal data. The precise contents, completeness, or sensitivity levels of these files have not been independently confirmed beyond the group’s claim.
What's at stake
Exposure of customer contracts and drawings could reveal proprietary project details and client relationships in the energy and infrastructure sector. Employee personal data, if present, carries standard risks of identity misuse or targeted follow-on contact. For the organization, the incident adds pressure around incident response costs, potential regulatory scrutiny in Italy, and the need to verify whether any operational systems were also affected.
Were you affected?
Individuals who have done business with Siem Srl or its clients, or who have been employed there, should monitor their financial accounts and email for unusual activity. Changing passwords for any associated services and enabling multi-factor authentication are standard first steps. Readers can also run a free exposure scan of their email address against known breach data sets to check for prior appearances of their information.
AICompiled with AI assistance from public sources and published under our editorial standards.
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Publicly posted by spacebears — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
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