Your Building Centers Listed by interlock Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On July 4, 2025, the Pennsylvania-based building-materials supplier Your Building Centers appeared on a leak site operated by the interlock ransomware group. The group claims it carried out a ransomware attack that included the exfiltration of internal files. The number of people whose information may be involved remains unknown, and public detail about the precise contents of those files is limited. For customers, contractors, employees, and partners who have shared personal or business information with the company over the years, the listing raises practical questions about whether their data could surface online or be misused.

Ransomware incidents of this type typically combine system disruption with the threat of public data release. Even when the full scope is not yet confirmed, the mere claim of file theft can create lasting uncertainty for anyone connected to the organization.

Breaking down the breach

Public reporting on July 4, 2025, established that Your Building Centers had been listed by the interlock ransomware group. According to the available facts, the group asserts that internal files were exfiltrated during a ransomware attack. No further technical details—such as the initial access method, the exact date of intrusion, the volume of data taken, or whether systems were encrypted—have been disclosed in the record. The number of individuals potentially affected is listed as unknown. At this stage the listing itself constitutes an unverified claim by the threat actor rather than an independently confirmed forensic finding.

The group behind it: interlock

Interlock is a ransomware operation that has been observed conducting double-extortion campaigns: encrypting victim systems while also stealing data and threatening to publish it if a ransom is not paid. Like other groups in this category, it typically advertises victims on dedicated leak sites to increase pressure. Public reporting on interlock has described it as targeting a range of industries, often focusing on organizations whose operations or customer relationships make downtime or data exposure particularly costly. The group’s listing of Your Building Centers follows this established pattern; however, no statements attributed to interlock beyond the claim of internal-file exfiltration are part of the current record for this specific incident.

Who is Your Building Centers?

Your Building Centers, often referred to as YBC, is a Pennsylvania-based company that operates 14 locations across Central Pennsylvania. For generations it has supplied contractors, builders, remodelers, and individual customers with name-brand building materials. Its roots extend to the early 1900s through predecessor companies, and it has long positioned itself as a community-oriented supplier rather than a purely transactional retailer. Organizations of this type routinely maintain customer accounts, order histories, contractor credit applications, employee records, and supplier correspondence. A breach involving such a firm therefore carries consequences beyond the company itself: local construction projects, small businesses, and households that rely on YBC for materials and credit relationships may find their information implicated.

What data was at risk

The only data category named in the available facts is “internal files exfiltrated in ransomware attack.” No more granular inventory—such as customer names, addresses, payment details, employee Social Security numbers, or financial records—has been publicly confirmed. Companies in the building-supply sector typically hold a mixture of personal identifiers, business contact information, purchase histories, credit applications, and internal operational documents. Because the precise contents remain undisclosed, it is not possible to state with certainty which of these categories, if any, were among the files claimed by interlock. Affected parties should treat the situation as one in which sensitive internal material may have left the company’s control, while recognizing that exact confirmation is still lacking.

The real-world impact

For individuals and businesses that have dealt with Your Building Centers, the primary risks are identity-related fraud, targeted phishing that references legitimate past transactions, and potential exposure of financial or credit information if such records were among the internal files. Contractors who maintain open accounts or financing arrangements could face additional scrutiny or social-engineering attempts. The company itself may experience operational disruption, reputational strain within the communities it serves, and the cost of investigation and remediation. Because the number of people affected is unknown and the data types remain only broadly described, the concrete scale of harm cannot yet be measured; the uncertainty itself, however, is already a practical burden for those who must decide how to monitor their accounts and communications.

Were you affected?

If you have been a customer, contractor, employee, or supplier of Your Building Centers, begin by monitoring financial statements and credit reports for unfamiliar activity. Enable multi-factor authentication on email and any accounts that share credentials or personal details with the company. Be alert for unsolicited messages that reference building materials, invoices, or account numbers, as these can be used in phishing. Readers can also run a free exposure scan of their email address to check whether their information has already appeared in known breach data sets. Official notifications from Your Building Centers, if and when they are issued, will provide the most direct guidance on next steps.

AICompiled with AI assistance from public sources and published under our editorial standards.