Cloak ransomware group
Cloak 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 13h ago.
Who they are
Cloak is a cybercriminal ransomware group that first appeared publicly in mid-2023, operating with a double-extortion model. It deploys an ARCrypter variant derived from Babuk, delivered via loaders that terminate security and backup services, delete shadow copies, and install encrypted payloads using algorithms like HC-128 combined with Curve25519 key generation. Victims include entities such as the Virginia Attorney General’s Office, whose IT systems were disrupted and whose data (134 GB) was exfiltrated and listed on Cloak’s Tor leak site. Cloak has been linked to other ARCrypter variants like Good Day, sharing victim portals and infrastructure. Its operations reportedly use initial access brokers, phishing, malvertising, and exploit kits for network infiltration.
Current status
Cloak's leak site is answering our checks. That does not mean the group is actively posting — plenty of sites stay up for months with nothing new on them — but the infrastructure is live.
The last change we recorded on it was 13h ago (20 Oct 2026 18:01 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.
Leak site capture
Watching for your name
If Cloak 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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