Apple has very quietly improved malware protection with Tuesday's Mac OS X 10.6.4 update, says a senior technology consultant at security firm Sophos. Examining an updated XProtect.plist file, the consultant notes that the code detects "HellRTS," a Trojan threat also known as OSX/Pinhead-B. The malware masquerades as a copy of iPhoto, and can potentially be used to force a Mac to send spam, take screenshots or share files.
