Cyber Incident Victim: Weller Truck Parts
Date:
Oct 2021
Location:
United States of America
Summary
Weller Truck Parts experienced a malware attack compromising the names and Social Security numbers of 6,675 individuals after unauthorized system access occurred over a multi-day period. The company detected the incident through employee reports of system disruptions, secured its networks, and initiated an investigation confirming data exposure. Following a months-long review to identify affected parties, the Michigan-based truck parts retailer notified impacted individuals of the breach, which exclusively involved personal identifiers without financial or medical details.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 1 motive | 1 technique |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
Weller Truck Parts, a Grand Rapids-based truck part retailer founded in 1932 with over 35 U.S. locations and approximately 800 employees, confirmed a data breach stemming from a malware attack discovered on October 7, 2021. Employees first identified the incident after observing malfunctioning systems, prompting immediate containment measures to secure affected infrastructure. The subsequent forensic investigation determined unauthorized access to company systems occurred between October 1 and October 7, 2021, during which an external actor potentially copied sensitive information. Weller initiated a comprehensive review of compromised files upon confirming data exposure, completing this analysis on May 23, 2022—nearly eight months after initial detection. The investigation revealed that attackers accessed personally identifiable information belonging to 6,675 individuals, specifically their full names and Social Security numbers. No financial data, medical records, or other categories of sensitive information were confirmed as compromised in the breach notification.
The company formally reported the incident to relevant authorities and affected individuals on June 10, 2022, distributing data breach notification letters to all impacted parties in compliance with state disclosure laws. These notifications detailed the specific types of exposed information and the timeframe of unauthorized access but did not disclose technical specifics regarding the malware variant used or the exact infiltration method. The breach affected neither operational continuity nor customer-facing services, with business operations continuing uninterrupted following system remediation. Weller's response included securing compromised systems and conducting forensic analysis but did not publicly disclose whether additional cybersecurity measures were implemented post-incident. The compromised data exclusively involved current or former employees rather than retail customers, as the company maintains limited consumer data collection practices typical for industrial parts distribution. Annual revenue figures exceeding $150 million and operational scale across multiple states positioned this as a significant cybersecurity incident within the commercial vehicle parts sector, though no operational disruptions or financial impacts beyond breach remediation costs were reported.