Latest documents leaked by ex-CIA worker Edward Snowden revealed that the British intelligence agency, Government Communications Headquarters (GCHQ) was behind the cyber-espionage scheme targeting Belgium's biggest telecommunications firm, Belgacom Group,
Citing the documents, the Germany's Der Spiegel reported that the latest revelations come after Belgian authorities reported an intrusion by 'foreign state' into the networks of the state-owned firm in July.
Belgian Prime Minister Elio di Rupo said that the investigation will continue and the report will be 'closely examined'.
"If the hypothesis involving another country is confirmed, we will of course undertake the necessary steps," di Rupo said.
According to slides from a GCHQ presentation, the process, which was part of 'Operation Socialist', involved targeting employees with malicious software called 'Quantum Insert' (QI) technology.
The technology would redirect the person being targeted to sites that then plant malware on their PCs that can control them, with some of PCs having access to vital units of Belgacom's infrastructure.
The presentation also revealed that the UK was on the verge of possessing access to Belgians' central roaming router that processes international traffic.
Recently, Snowden's documents also revealed that the US had been snooping on the Brazilian President Dilma Rousseff's confidential communications, upon which she postponed an October state visit to Washington and ordered an explanation from Washington.
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