Leak site not responding

Cryptxxx ransomware group

Cryptxxx 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 ago9 Dec 2024 20:27 UTC

Sectors observed—none stated

Who they are

CryptXXX is a ransomware strain that first appeared in April 2016, developed by the same group behind the Reveton and Angler Exploit Kit operations. It uses a single-extortion model, encrypting victim files with RSA-4096 and AES-256 encryption, appending the .crypt or .crypt1 extensions in early versions, and later variants dropping different extensions. Distribution was largely via the Angler and Neutrino exploit kits, targeting unpatched browsers, plugins, and malicious email attachments. CryptXXX also included credential theft capabilities, harvesting from browsers and FTP clients, and in some variants, a file-stealing module. Notable campaigns affected victims globally, with a strong concentration in North America and Europe. Operations were disrupted in mid-2016 when security researchers from Kaspersky Lab released decryption tools, forcing the group to release updated, harder-to-crack versions.

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

Cryptxxx'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 (9 Dec 2024 20:27 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 Cryptxxx 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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