Taiwan Broadband Communications (TBC) and Subsidiary Hit by Cyberattack; Some Server Files Maliciously Encrypted

On October 30, Taiwan Broadband Communications (TBC) issued a material information filing on MOPS stating that IT systems of the company and its subsidiary were attacked by unknown external hackers, resulting in malicious encryption of files on certain servers and affecting some internal operational systems ^[1]. The company has isolated affected devices, restricted account privileges, rotated passwords, deployed EDR, and restored systems from secure backups; it assessed that no personal data or core confidential documents were leaked and there is no material impact on operations or finances ^[1].

Industries mainly affected: Telecom

1. Subscribers should monitor official service announcements and beware of phishing messages impersonating support ^[1].
2. Operators should verify offline backup integrity and enforce strict network segmentation ^[1].