Leak site not responding

Cuba ransomware group

Cuba 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, which we last saw change 2y ago.

Leak site statusOfflinenot answering

Tracked since—no dated record

Last activity2y ago25 Jan 2025 02:46 UTC

Sectors observed—none stated

Who they are

Cuba ransomware, active since at least 2019, is a financially motivated threat group operating a double-extortion scheme—encrypting files and exfiltrating data to pressure victims. It has targeted government agencies, healthcare providers, critical infrastructure, financial institutions, and manufacturing firms, primarily in the United States, Canada, and Europe. Distribution often involves the Hancitor (Chanitor) malware loader, phishing campaigns, and exploitation of vulnerabilities in public-facing services such as Microsoft Exchange. Cuba employs RSA and AES encryption, typically appending the .cuba extension to affected files, and drops ransom notes instructing victims to contact the attackers via Tor-based portals. In December 2021, the FBI reported that Cuba ransomware operators had compromised at least 49 entities in U.S. critical infrastructure sectors, stealing data and demanding multimillion-dollar ransoms.

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

Cuba'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.

The last change we recorded on it was 2y ago (25 Jan 2025 02:46 UTC).

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 Cuba 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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