Sabbath is a relatively obscure ransomware group that emerged in November 2021, operating with apparent financial motivations and targeting a limited number of victims across telecommunications and education sectors. The group's origin and affiliations remain largely undocumented in public threat intelligence reporting, with no confirmed details about their operational structure or whether they operate as an independent entity or part of a broader ransomware-as-a-service ecosystem. With only 17 known victims primarily concentrated in the United States and United Kingdom, Sabbath appears to focus on telecommunications and education sectors, though specific details about their initial access vectors, encryption methods, or use of double extortion tactics have not been extensively documented by major security firms or government agencies. The group has not been associated with any widely publicized high-profile attacks or significant law enforcement actions, suggesting a lower operational profile compared to major ransomware families. Current intelligence indicates limited visibility into Sabbath's ongoing activities, with insufficient public documentation to definitively assess whether the group remains active, has ceased operations, or has undergone rebranding. The group has been linked to 17 public disclosures across our corpus. First observed on a leak site on November 22, 2021; most recent post February 28, 2022. The operation is currently inactive.
If your organisation is affected
A listing by Sabbath means Summit College appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.
- Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
- Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
- Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
- Monitor for the data appearing on Sabbath's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.
How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.
