Blackout ransomware group
Blackout 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 17h ago.
Who they are
Blackout surfaced in February 2024 and operates using a double-extortion model. Targets span sectors like healthcare, mining, telecommunications, and food & beverage—in countries including France, Canada, Mexico, Croatia, and Spain. This ransomware employs conventional cryptographic techniques (details unspecified), appends a custom extension to encrypted files, and presents victims with ransom demands via a Tor-based leak/negotiation site. The operation runs as a crypto-ransomware and data broker, combining extortion with data publication threats.
Current status
Blackout'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 17h ago (4 Sep 2026 19:27 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
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 Blackout 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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