A ransomware attack targeting a prominent software company last week has led to disruptions for several businesses, including Starbucks and the U.K. supermarket chain Morrisons. Blue Yonder, a provider of supply chain technology utilized by various international brands, reported that it encountered service disruptions for its clients on Thursday, which was identified as stemming from a ransomware incident.

As a result of the attack, certain systems went offline, disrupting operations for clients dependent on Blue Yonder’s software. For instance, a Starbucks representative noted that the coffee chain’s ability to manage employee schedules and track work hours faced interruptions, prompting store leaders throughout North America to rely on manual workarounds.

Despite the outage, Starbucks assured that customer service remained unaffected and emphasized the importance of ensuring timely payroll for employees. While the company is actively working toward full service restoration, it confirmed that payroll processing was back online by Tuesday morning.

In the United Kingdom, major grocery retailers like Morrisons and Sainsbury’s were also impacted by the incident. Both companies indicated over the weekend that they had activated contingency measures to maintain their operations. A Morrisons spokesperson confirmed that the disruption affected its warehouse management systems for fresh goods and produce, stating that the company continued to operate on backup systems as of Tuesday.

Sainsbury’s announced on Tuesday that its services had been fully restored. Blue Yonder has not disclosed the total number of affected customers but assured that they had notified the relevant parties and would maintain communication with them as necessary.

Furthermore, the company reiterated that it was in the process of recovery and collaborating tirelessly with external cybersecurity experts to advance the recovery, implementing various defensive and forensic measures. Blue Yonder’s website boasts a diverse global client list, including notable brands like Gap, Ford, and Walgreens. According to spokespeople, Walgreens and Gap were not affected by this ransomware attack, while Ford is currently investigating whether its operations were influenced, with no further updates available as of Tuesday.

Headquartered in Arizona, Blue Yonder is a subsidiary of Japan’s Panasonic Corp, which acquired the software firm in September 2021.