SYNful Knock cyberspying malware takes over Cisco routers

Security researchers say they have uncovered clandestine attacks across three continents on the routers that direct traffic around the internet, potentially allowing suspected cyberspies to harvest vast amounts of data while going undetected.

In the attacks, a highly sophisticated form of malicious software, dubbed SYNful Knock, has been implanted in routers made by Cisco, the world’s top supplier, U.S. security research firm FireEye said on Tuesday.

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