A ransomware group calling itself Chaos claims to have obtained data from corematerials.com, according to a listing posted on the group’s dark web leak site and dated August 28, 2026. This claim has been tracked by ransomware.live, a security research platform that monitors ransomware groups’ public leak sites, but it has not been independently verified. Corematerials.com has not confirmed any incident, and no regulator has confirmed the claim either. As with all posts on ransomware extortion sites, the claim should be treated as an unverified assertion made by a criminal group seeking leverage, not as an established fact.
What we know — and don’t
- A group identifying itself as Chaos posted a claim referencing corematerials.com on its leak site, with a claimed date of August 28, 2026.
- Corematerials.com operates in a sector categorized broadly as ‘other’ — beyond that, we have no further detail on the company’s specific business activities.
- The specific data types the group claims to have obtained have not been disclosed in the listing and have not been confirmed by any independent party.
- No confirmation has been issued by corematerials.com, and no regulatory filing or public breach notification referencing this incident has been identified as of this writing.
- Ransomware groups frequently exaggerate, misattribute, or fabricate claims to pressure victims, so the existence of a leak-site post alone does not establish that any data was actually obtained.
What should you do if you have an account with this company?
- Change your password for any account associated with corematerials.com, and avoid reusing that password elsewhere.
- Enable two-factor authentication (2FA) on the account if it is offered and not already active.
- Watch for phishing emails, calls, or texts that reference corematerials.com or claim to be from the company, especially messages urging urgent action or requesting personal details.
- Avoid clicking links or downloading attachments from unsolicited messages referencing this incident, even if they appear to be from corematerials.com or a security vendor.
- Since claims like this often precede identity-theft attempts, consider signing up for a service like Aura or LifeLock to monitor for misuse of your personal information.
- Keep an eye on your financial statements and credit reports for any unfamiliar activity in the weeks following a claim like this.
BreachLetter will update this page if corematerials.com confirms this incident, if it is officially reported to regulators, or if further verified details become available.