For the second time in under a year, security researchers have spotted a particularly nasty bit of malware in popular Mac BitTorrent client, ‘Transmission.’ The discovery came just five months after its last brush with malware — the first viable ransomware ever found on the Mac. Security researchers at ESET discovered the newest bug, called OSX/Keydnap. Apparently, the malware was being spread through a recompiled version of Transmission that was temporarily distributed through its own website. OSX/Keydnap executes in a similar fashion to Transmission’s last malware infection, KeRanger, in that it adds a malicious block of code to the core…

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