McKesson Corporation
● Listed in the last 48hAbout the organisation
Hundreds of millions of records/rows of data was compromised containing very sensitive information spanning from PII to PHI. We urge you to reach out. Read our emails. We will provide a substanial discount. Failure to engage with us will result in the full publication of data taken from you and we very much intend to carry that out if you do not engage with us. This is a final warning to reach out by 1 Sep 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 29 Aug 2026 | Warning: FINAL WARNING
ShellCodeX evidence assessment
Moderate record · 65/100. Moderate record completeness based on identity, context and retained source evidence. This score does not verify the attacker's allegation.
- The record includes organisation-specific context rather than only a victim name.
- Country attribution is available for geographic context.
- Sector classification supports peer-risk comparison.
- A source listing reference is retained for traceability.
- The named group has multiple recent claims in the tracker.
What the listing means
McKesson Corporation appeared on the shinyhunters leak site on 28 August 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated. This group has published 18 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing McKesson Corporation as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account with this organisation, change the password now and enable two-factor authentication.
- Other Healthcare organisations should review this group's known TTPs and validate detection coverage against them.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/TWNLZXNzb24gQ29ycG9yYXRpb25Ac2hpbnlodW50ZXJz