Erebus is a relatively obscure ransomware group that first emerged in June 2017 with apparent financial motivations, though limited public documentation exists about their operations. The group's origin and potential affiliations remain largely unknown, with no confirmed details about their operational structure or whether they operate as a ransomware-as-a-service model. Based on available intelligence, Erebus has demonstrated capability to target information technology sectors, though their specific attack methodologies, initial access vectors, and encryption techniques have not been extensively documented by major security research organizations. The group's operational scope appears limited, with only one publicly documented victim, suggesting either highly targeted operations or minimal operational activity compared to more prominent ransomware groups. Current intelligence indicates that Erebus has maintained a low profile with minimal reported activity, making their current operational status unclear. The group has been linked to 1 public disclosures across our corpus. First observed on a leak site on June 10, 2017. The operation is currently inactive.
If your organisation is affected
A listing by erebus means Internet Nayana 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 erebus'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.
