www.cmsg.cl Listed by ransomhub Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Ransomware groups continue to target professional-services firms across Latin America, using double-extortion tactics that combine encryption with the public listing of stolen data. Against that backdrop, the Chilean consulting firm operating at www.cmsg.cl appeared on a ransomware leak site in late January 2025, adding another mid-sized service provider to the roster of claimed victims.

Public reporting indicates that the group known as ransomhub listed the organisation on 31 January 2025 and asserted that internal files had been taken. The number of people affected remains unknown, and independent confirmation of the intrusion itself has not been published. Even so, any claim that internal corporate material has left a consulting firm’s network raises immediate questions for clients, employees and partners whose information may have been stored there.

What happened

According to the available record, www.cmsg.cl was listed by the ransomhub ransomware group on 31 January 2025. The listing states that internal files were exfiltrated in a ransomware attack. No further technical details—such as the initial access vector, the date the intrusion began, the volume of data removed, or whether encryption was also deployed—have been disclosed in the public summary. The number of individuals whose information may have been involved is recorded as unknown. At present the incident rests on the group’s own claim; no independent verification or company statement confirming the breach has been included in the facts provided.

The group behind it: ransomhub

Ransomhub is a ransomware-as-a-service operation that emerged after the disruption of earlier groups and has been active since mid-2024. Like many of its peers, it typically employs a double-extortion model: operators encrypt systems while simultaneously copying data and threatening to publish it on a dedicated leak site if a ransom is not paid. Affiliates handle the initial compromise and data theft, then share proceeds with the core developers. Public reporting has linked the brand to attacks on organisations in multiple sectors and countries, often accompanied by countdown timers and sample file dumps on its dark-web portal. In the present case the group claims to have listed www.cmsg.cl and to have obtained internal files; those assertions remain unverified claims rather than independently What's Publicly Reported.

About www.cmsg.cl

CMSG is a consulting company based in Chile that offers business consulting, digital marketing and web-design services. Firms of this type routinely hold client contracts, project documentation, marketing strategies, contact lists, financial records and employee data in order to deliver tailored advice and digital solutions. Because such material often includes commercially sensitive information belonging to third parties, a breach at a consulting practice can extend well beyond the firm’s own walls and affect the clients who entrusted it with their data. The organisation’s public-facing description emphasises technology and marketing expertise aimed at improving client performance; that same concentration of client-related files makes any claimed exfiltration consequential for the wider business community that relies on its services.

What was likely exposed

The only data type named in the public record is “internal files exfiltrated in a ransomware attack.” Exact contents, file counts and whether personal data of clients or staff were included have not been disclosed. Organisations that provide business consulting, digital marketing and web design typically store:

• client contracts, proposals and project deliverables
• contact databases and marketing lists
• financial and billing records
• employee personnel files and internal correspondence
• credentials or configuration details related to client websites and campaigns

None of these categories has been confirmed as present in the material claimed by ransomhub; the precise scope therefore remains unconfirmed.

What's at stake

For individuals whose details may have been among the internal files, the practical risks include targeted phishing, social-engineering attempts that reference genuine project names, and potential misuse of contact or financial information. For the organisation itself, the listing can erode client trust, trigger contractual notification obligations under Chilean data-protection rules, and create operational disruption while systems are examined and restored. Because the number of affected people is unknown and the exact data set is unconfirmed, the full extent of downstream harm cannot yet be measured; the mere public claim is already sufficient to place both the firm and its clients on alert.

If your data was in this claimed breach

If you have done business with CMSG or believe your information may have been stored in its systems, treat the situation as a precautionary matter rather than a claimed personal compromise. Change passwords on any accounts that may have been shared with the firm, enable multi-factor authentication wherever it is available, and monitor financial and email accounts for unusual activity. Be sceptical of unsolicited messages that reference consulting projects or marketing campaigns, as attackers sometimes reuse stolen context. Readers can also run a free exposure scan of their email address to check whether that address has already appeared in other known breach data sets; such a check does not confirm or rule out involvement in this specific incident, but it provides an additional data point for personal risk assessment.

AICompiled with AI assistance from public sources and published under our editorial standards.