Crylock ransomware group
Crylock 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 5y ago.
Who they are
CryLock is a ransomware variant that emerged around April 2020, evolving from the Cryakl (Fantomas) ransomware family. It follows a semi-affiliate model, offering customizable options for partners—such as variable encryption routines, network scanning for lateral movement, shadow copy deletion, and process termination—and flexible delivery methods. During encryption, CryLock renames files to include the developer email, a unique victim ID, and a randomized three-letter extension. Victims typically encounter a countdown timer in a pop-up ransom message that warns about escalating ransom costs and potential loss of decryption capabilities.
Current status
Crylock'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 5y ago (1 May 2021 00:00 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
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 Crylock 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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