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Sonoma Underground Services Inc data breach

Sonoma Underground Services Inc has reported a data breach that exposed sensitive personal information, including Full Name, Social Security Number, and Direct Deposit Account Details. Individuals who received a notification letter should understand the risks of identity theft and financial fraud, and consider immediate protective measures.

Incident readout

Company
Sonoma Underground Services Inc
Reported to
Indiana Attorney General
Filed
August 6, 2026
People affected
Not stated in the filing
Incident type in filing
Not stated
Our review
Monitoring
Read the official filing

Was this a ransomware attack?

The filing does not say ransomware was involved. We do not label an incident ransomware unless the company’s report says so. Whatever the cause, the steps to protect yourself and the legal question are the same.

Information listed in the filing

  • Full Name
  • Social Security Number
  • Date of Birth
  • Wage and Compensation Information
  • Direct Deposit Account Details
  • Home Address
  • Driver's License Number
  • Tax Withholding Information

What we know

Sonoma Underground Services Inc, operating in Indiana, experienced a data breach impacting personal information, with the incident occurring on December 10, 2025. The company formally reported this security event on August 6, 2026. While the exact cause remains under investigation, the breach has confirmed the exposure of various sensitive personal details.

The compromised data types include Full Name, Social Security Number, Date of Birth, Wage and Compensation Information, Direct Deposit Account Details, Home Address, Driver's License Number, and Tax Withholding Information. The exposure of these core identifiers creates significant risks, particularly for identity theft and fraudulent financial activities. Such detailed information can be misused to open new accounts, file false tax returns, or gain unauthorized access to existing financial services.

Following a breach of this nature, stolen data is often traded on dark web marketplaces, where malicious actors purchase it to commit various forms of fraud. Although the company’s investigation is ongoing, individuals should proceed with caution and proactively monitor their personal and financial accounts. This type of information makes individuals vulnerable to long-term risks that require vigilance.

If you received a data breach notification from Sonoma Underground Services Inc, it is crucial to carefully review the letter for specific instructions. We recommend immediately monitoring your credit reports and financial statements for any unusual activity. Placing a fraud alert or security freeze on your credit files with the three major credit bureaus (Equifax, Experian, and TransUnion) can also help prevent unauthorized accounts from being opened in your name.

Companies entrusted with personal data have a legal obligation to protect it. A data breach suggests that security protocols may have been insufficient. Affected individuals might have legal options to seek recourse for the potential harm and inconvenience caused by this incident. Our firm is currently reviewing cases related to the Sonoma Underground Services Inc data breach, and we offer a free, no-obligation case review to help you understand your rights.

See every breach reported in Indiana or read what to do after a ransomware attack.

After the Sonoma Underground Services Inc incident: what to do and your options

What should I do after getting the Sonoma Underground Services Inc data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
How many people were affected by the Sonoma Underground Services Inc data breach, and what was exposed?
The filing does not give a count of affected people and lists the following information as involved: Full Name, Social Security Number, Date of Birth, Wage and Compensation Information, Direct Deposit Account Details, Home Address, Driver's License Number, Tax Withholding Information. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Did Sonoma Underground Services Inc offer free credit monitoring?
Check your letter from Sonoma Underground Services Inc. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Signing up doesn't waive any legal rights you may have.
Where can I see the official Sonoma Underground Services Inc breach notice?
Sonoma Underground Services Inc's report is published by the Indiana Attorney General: https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/security-breaches/#3sonoma-underground-services-inc-2026 Compare it with the letter you received to confirm the dates and details match.
Can I sue Sonoma Underground Services Inc over the data breach?
It depends on what was exposed, the law in Indiana and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Do I need a Sonoma Underground Services Inc data breach lawyer or attorney?
Whether the company's systems were encrypted by ransomware or data was simply taken, the legal question is the same: did it protect your information the way the law requires? An attorney can review your notice for free, and these cases are usually handled on contingency.
Is there a Sonoma Underground Services Inc data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Sonoma Underground Services Inc. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
Is the Sonoma Underground Services Inc data breach letter legit or a scam?
A notice from Sonoma Underground Services Inc in the mail matches the breach Sonoma Underground Services Inc reported to the Indiana Attorney General on August 6, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Sonoma Underground Services Inc through a phone number or website you find yourself.
How much could a Sonoma Underground Services Inc data breach settlement or claim be worth?
There is no set amount, and no Sonoma Underground Services Inc settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. The filing lists Full Name, Social Security Number, Date of Birth as involved. Keep receipts and records; they're what damages claims are built on.

Other breaches reported in Indiana

Attorney advertising. This page reflects a public regulator filing; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.