CRPX0 is a ransomware group first observed in August 2026 with an apparent financial motivation, though its limited operational history makes comprehensive attribution difficult at this time. Based on available data, the group has claimed or been attributed to two known victims, with targeting activity concentrated in the United States and a notable focus on the healthcare sector, a pattern consistent with threat actors seeking high-pressure victims likely to pay ransoms quickly due to operational criticality. No public reporting from CISA, the FBI, Mandiant, or other reputable threat intelligence organizations has yet documented the group's specific initial access vectors, tooling, encryption methods, or extortion tactics in sufficient detail to make definitive technical assessments. No major high-profile campaigns, record ransom demands, or law enforcement actions against CRPX0 have been publicly documented as of the time of this profile. Given its very recent emergence and limited victim count, CRPX0 should be considered an early-stage or emerging threat actor whose full capabilities, affiliations, and operational scope remain largely uncharacterized pending further research and public disclosure. The group has been linked to 2 public disclosures across our corpus. First observed on a leak site on August 10, 2026. The operation is currently active.
Sector and geography
This disclosure adds to ransomware activity in the Healthcare sector, which has 2,608 disclosures indexed across all operators we track. Geographically, Top Notch Dentistry of Dallas is reported in United States, a country with 3,159 ransomware disclosures in our corpus.
If your organisation is affected
A listing by CRPX0 means Top Notch Dentistry of Dallas appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 CRPX0'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.
