"Security researchers are seeing some intriguing malware in small pockets. One piece of malware found on a desktop machine during a forensics investigation was actually pre-coded to steal specific information from the victim’s organization, says Greg Hoglund, CEO and founder of HBGary, whose company sees about 5,000 new pieces of malware a day. "It knew what it was looking for," he says. And the malware was disposable so that it could disappear without a trace after doing its dirty work.
That’s a step up from an advanced method used by some malware writers to "clean up" after they infiltrate a system in order to cover their tracks, according to Hoglund.
Then there was the malware that was written specifically to crawl for, and to steal intellectual property. What was most unusual about the malware is that could crawl different file types — Excel, PDF, for instance — for intellectual property to steal, Hoglund says. Then it would encrypt and send the stolen information to its own servers. The malware likely initially infected the machine via a spear-phishing or in a cross-site scripting (XSS) attack, he says. " – Content courtesy of Rare Malware A Hint Of Threats To Come – DarkReading