Leak site not responding

Core ransomware group

Core is one of the extortion operations we watch continuously. This page covers what is known about the group and the current state of its leak site.

Leak site statusOfflinenot answering

Tracked since—no dated record

Last activity—nothing recorded

Sectors observed—none stated

Who they are

Core ransomware surfaced in early 2025 as a new variant within the broader Makop family. It employs a single-extortion model, focusing on encrypting files and demanding payment, without public data-leak threats. The malware appends the .core extension to encrypted files and is delivered via typical exploit vectors known to RaaS campaigns. Core does not showcase advanced double-extortion tactics seen in other modern strains, but it stands out for its familial lineage and continued evolution from Makop ancestors.

Descriptions are compiled from public reporting and vendor research. They describe how a group has historically operated and can lag its current behaviour; the status and timings above are our own.

Current status

Core's leak site is not answering. Sites go dark for infrastructure trouble, a deliberate quiet period, or a takedown, and a good number return weeks later under the same name, so the entry stays on the list either way.

Which organisations this group has named, and when, is part of the SINON platform rather than this page. Create an account to search it, or to be told automatically if a name you care about turns up.

Sectors targeted

Industries this group has been observed going after, most common first.

This group does not state an industry on its site, so we have nothing reliable to report. Most crews are opportunistic rather than sector-specific in any case — they hit what they can reach.

Watching for your name

If Core posts your company, a supplier or a subsidiary, you want to hear it from us rather than from a journalist. SINON checks these sites continuously and alerts on the names you give it.

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