Pro-Russian hacking groups NoName057(16) and Z-Pentest Alliance have claimed responsibility for cyberattacks targeting supermarket refrigeration systems across Europe, reportedly causing temperatures in freezer units to rise to +50°C.
According to Cybernews, the groups also claimed to have obtained a database containing employee and customer credentials associated with Danish engineering company Danfoss. NoName057(16) said it had published a sample of more than 2,500 records, including usernames and passwords.
However, the claims remain unverified. Both groups' Telegram channels have since been deleted, while cybersecurity researcher CyberKnow suggested the hackers may have taken credit for attacks carried out by others.
During the first week of November, refrigeration disruptions were reported in supermarkets across Belgium, Estonia, Ireland, Luxembourg, the Netherlands, Denmark, Sweden and Finland. Retailers reportedly had to discard tonnes of spoiled food.
Similar attacks affected hundreds of French supermarkets in October.
Cybersecurity experts estimate that approximately 13,000 refrigeration systems across Europe continue to operate on outdated software with known vulnerabilities.
NoName057(16), active since March 2022, is known for DDoS attacks against government institutions, banks and infrastructure in Ukraine and NATO countries. In 2025, an international law enforcement operation dismantled more than 100 servers associated with the group.
Z-Pentest Alliance, established in late 2024, focuses on industrial control systems, including energy, water and agricultural infrastructure. The group typically exploits internet-connected equipment with weak passwords or inadequate security protections.
