0mega ransomware group
0mega 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 18h ago.
Who they are
0mega is a ransomware group first observed in May 2022, operating with a double extortion model:
- Encrypting victim files (adding the .0mega extension)
- Threatening to leak stolen data if ransom demands are not met.
Ransom notes are named DECRYPT-FILES.txt and include victim-specific details and a Tor-based negotiation portal.
Unlike typical Ransomware-as-a-Service (RaaS) operations, 0mega appears to work as a closed group, selecting a limited number of high-value targets.
The group employs two main tactics:
- Traditional ransomware encryption of on-premise systems.
- Cloud-based extortion, compromising Microsoft 365 Global Admin accounts, creating unauthorized admin users, and exfiltrating data via SharePoint.
Active period: May 2022 – January 2024
Current status
0mega'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 18h ago (4 Sep 2026 19:18 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 0mega 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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