Chek Tan and Company, LLP Listed by radar Ransomware Group

On October 8, 2025, accounting firm Chek Tan and Company, LLP appeared on the leak site of the radar ransomware group after its internal files were allegedly exfiltrated during a ransomware attack. The San Francisco-based company provides accounting, audits, management consulting, IRS representation, and tax management services to individuals and businesses whose sensitive financial and personal records may now be in attackers’ hands.

What Public Reporting Shows

Public reporting indicates that radar posted the firm to its leak site on October 8, 2025. Available details describe the theft of internal files containing client and operational data. The exact number of affected individuals remains unknown, and the precise volume or sensitivity of the stolen records has not been disclosed by the company or the attackers. The incident follows the typical ransomware pattern of initial compromise, data exfiltration, and subsequent extortion pressure.

Why This Matters for You and Your Family

If you or anyone in your household has used Chek Tan and Company for tax preparation, IRS matters, audits, or financial consulting, your personal information could be exposed. Tax returns, Social Security numbers, bank account details, addresses, and employment records are common in accounting firm files. Once leaked, this data can be sold, combined with other breaches, and used to file fraudulent tax returns, open accounts in your name, or target you with convincing phishing attacks. Your family’s financial stability and credit can be affected long after the initial breach is forgotten.

The Doxxing and Identity-Chain Implications

Stolen accounting data rarely stays isolated. Attackers and data brokers routinely link tax documents to email addresses, phone numbers, family member names, and online handles. A single leaked IRS form can expose your home address, spouse’s information, and dependent children’s details. These connections create an identity chain that turns one breach into repeated targeting across the dark web. Credential leaks of this kind also cascade into account takeovers, especially for gaming platforms where children often reuse passwords or email addresses tied to family financial records.

What to Do

• Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, then use the included cleanup of data broker records.
• Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure of your information is caught in hours rather than months.
• Rotate any password you have ever used with Chek Tan and Company wherever it appears, and switch to 2FA through an authenticator app instead of text messages.
• Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts that can chain back to the same leaked address or email.
• Let remediation specialists handle takedown requests for any newly surfaced personal records on data broker and people-search sites.

The radar group’s latest posting is a reminder that even trusted local service providers can become gateways to identity theft. Acting quickly on the information you control, rather than waiting for the firm to send a notice, remains the most practical defense. DoxxScan by GalaxyWarden delivers that defense through continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping that connects scattered online handles to real identities, hands-on remediation by specialists who manage takedowns, and full household coverage that includes children’s gaming accounts vulnerable to credential-based attacks.