The rapidly expanding number of satellites transmitting GPS locations, cellphone signals and other sensitive information is creating new opportunities for hackers.

It’s a risk exacerbated by the growing number of aging satellite systems in circulation. While it is cheaper to leave old satellites in orbit rather than pulling them from space, the outdated systems are even easier targets for hacking.

Just last week, security researchers at Symantec warned that a China-based cyber espionage group known as Thrip targeted satellite, telecom and defense companies in the United States and Southeast Asia.

“Thrip’s attack on telecoms and satellite operators exposes the possibility that the attackers could intercept or even alter communications traffic from enterprises and consumers,” Symantec said in a statement, noting its malicious behavior was well-hidden behind legitimate information technology administration tools.

Thrip used malware to infect computers linked to the satellites in an attempt to seize control of them — efforts that suggest the group’s motivations could extend beyond spying and include “disruption,” according to Symantec.

The satellite concerns has further inflamed fears about China’s efforts to spy on the U.S. and to steal U.S. intellectual property.

The head of the House Homeland Security Committee connected the report on Thrip to Beijing’s efforts to steal intellectual property.

“Our satellites are more advanced so they are stealing our intellectual property — it is espionage to make their satellites on par with ours,” Rep. Michael McCaul (R-Texas) told The Hill in an interview.

“Both commercial and military — it is a huge threat.”

Other lawmakers said it is a wake-up call that highlights how critical infrastructure must be protected from outside threats.

“[I]t’s no surprise that bad actors, like China, continuously attempt to exploit vulnerabilities across our critical infrastructure,” Rep. John Ratcliffe (R-Texas), chairman of the Homeland Security Subcommittee on Cybersecurity and Infrastructure Protection, told The Hill in a statement.

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