IBM X-Force team reveals that a growing number of cyber attacks against big IT enterprises relies on the Tor network. IBM is advising companies to start blocking Tor for incoming and outgoing traffic. In the US only, in 2015, in. 2015, the number of. cyber attacks and other malicious events that relied on the. Tor network is used to hide the control infrastructure for botnets, making them resilient to the takeover operation conducted by security. firm and law enforcement. experts speculate that this value will grow up until the end of the year.”]
Source: http://securityaffairs.co/wordpress/39603/cyber-crime/enterprises-tor-network.html