**Overview:** Ragnarlocker is a financially motivated ransomware operation that emerged in April 2020, conducting targeted attacks against enterprise organizations across multiple sectors with a focus on maximizing profit through encryption and data theft extortion tactics.
**Origin & Affiliation:** The group's country of origin remains unclear based on publicly available intelligence, though they operate as an independent ransomware family rather than offering Ransomware-as-a-Service capabilities to other criminal actors.
**Attack Methodology:** Ragnarlocker operators typically gain initial access through compromised Remote Desktop Protocol credentials, phishing campaigns, and exploitation of public-facing applications, subsequently deploying their custom ransomware payload that employs strong encryption algorithms. The group practices double extortion tactics, exfiltrating sensitive data before encryption and threatening to publish stolen information on dedicated leak sites if ransom demands are not met, often targeting network shares and attempting to delete shadow copies to prevent recovery.
**Notable Campaigns:** The group has successfully compromised 128 documented victims across multiple countries, with significant targeting of critical infrastructure sectors including energy, finance, and telecommunications organizations, though specific high-profile incidents and ransom amounts have not been widely disclosed in public threat intelligence reports.
**Current Status:** Based on available public reporting, Ragnarlocker remains an active threat as of recent security advisories, continuing to target organizations primarily in the United States and Europe. The group has been linked to 128 public disclosures across our corpus. First observed on a leak site on April 1, 2020; most recent post October 11, 2023. The operation is currently inactive.
Also tracked as: Ragnar Locker.
Sector and geography
Geographically, Atlas Financial Holdings, Inc. - Leaked is reported in United States, a country with 11,033 ransomware disclosures in our corpus.
If your organisation is affected
A listing by Ragnarlocker means Atlas Financial Holdings, Inc. - Leaked 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.
- Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
- Monitor for the data appearing on Ragnarlocker'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.
