At least six other organizations have been infiltrated by the ShadowHammer hacking group. Kaspersky’s security researchers were able to find a number of other malware samples that employed similar algorithms and were also signed with valid and legitimate certificates. The company also found evidence which connects some of the methods used in the attack from the ShadowPad supply chain attack from 2017 that impacted NetSarang and against CCleaner, ESET, the latter was identified as the threat group by both Microsoft and other security researchers.
Source: https://www.bleepingcomputer.com/news/security/shadowhammer-targets-multiple-companies-asus-just-one-of-them/