The APT10 group, a hacking group alleged to work on behalf of the Chinese Ministry of State Security’s Tianjin State Security Bureau, is believed to be behind the hacking of some of the world’s biggest computer services firms, according to an exclusive report from Reuters.

APT10, which was in the news only yesterday after it was revealed that more than a dozen major global telcommunications firms had been hacked by group, are alleged to have stolen data from Fujitsu Ltd., Tata Consultancy Services Ltd., NTT Data Corp, Dimension Data Holdings PLC, Computer Sciences Corp. and DXC Technology Inc., a services spinoff of Hewlett Packard Enterprise Co.

Clients of those companies were also targeted and hacked, including Telefonaktiebolaget LM Ericsson, Huntington Ingalls Industries Inc. and Sabre Corp.

The attacks targeting the companies are said to have started in 2014 and were focused on gathering corporate and state secrets in an effort to boost Chinese economic interests.

In a twist, the report provides further details on the indictment of two APT10 members in December.  Zhu Hua — known online as Afwar, CVNX, Alayos and Godkiller — and Zhang Shilong, also known as Baobeilong, Zhang Jianguo and Atreexp, were alleged to be part of APT10 and had been involved in breaking into and stealing data from 45 U.S. tech companies and government agencies. The only previously known companies targeted before today in relation to the indictment were IBM Corp. and HPE.

Some of the hacks have been previously disclosed. The Sabre hack was previously reported in 2015 and was suspected at the time to be linked to Chinese hackers.

The Chinese government has denied the accusations, saying that it opposes industrial espionage. “The Chinese government has never in any form participated in or supported any person to carry out the theft of commercial secrets,” the Chinese government said in a statement.

The reported hacks may be the tip of the iceberg. As The Register noted, having gained access to the top-tier service providers, the APT10 group may have gained access to many of their customers. Those customers run into the millions, “dramatically increasing the pool of valuable industrial and aerospace data stolen.”

Image: FBI