A report from Alcatel-Lucent shows that Windows PCs and laptops have been cited as the major source for malware that has been affecting mobile networks.
The research was compiled through data collected through the company's own network-based malware detection tools. It showed that since June this year Windows-based PCs were responsible for 80% of mobile network malware infections.
The report said: "These Windows/PCs are connected to the mobile network via dongles and mobile Wi-Fi devices or simply tethered to smartphones.
"They are responsible for a large percentage of the malware infections observed. This is because these devices are still the favourite of hardcore professional cyber criminals who have a huge investment in the Windows malware ecosystem.
"As the mobile network becomes the access network of choice for many Windows/PCs, the malware moves with them."
The report also noticed the proliferation of malicious spyware across networks, which is thought to be distributed when users download free software or games.
The report added: "Mobile spyware is definitely on the increase - 10 of the malware entries on the top 25 mobile infection list are mobile spyware.
"The modern smartphone presents the perfect platform for cyber espionage. First, it can be used simply as a tool the owner can use to photograph, film, record audio, scan networks and send the results immediately through the air to a safe site for analysis."
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