Japanese Bicycle Manufacturer Shimano hit by Lockbit Gang

November 21, 2023


World-leading bicycle part manufacturer Shimano has suffered a major cyber attack. 4.5 terabytes of sensitive data breached including employee passport data, financial documents and confidential diagrams.

LockBit gave Shimano a 5 November deadline to pay ransom, to which it appears Shimano refused to pay, as the hacking group has listed the company’s data as published. Shimano is yet to issue a statement on the breach, but responding to media inquiries, the company said: “This is an internal matter at Shimano, and we cannot comment on anything at this time.”

Incident Date

November 3, 2023



Estimated Cost

4.5 terabytes of sensitive data breached


Type of Malware

No Malware identified

Threat Source