HANOI, July 27 (Xinhua) -- Over 560,000 computers in Vietnam have recently been infected with a malware called BrowserSpy, according to the country's leading computer security firm BKAV on Friday.

BrowserSpy can monitor contents of users' web history, emails and social network accounts, stealing personal information.

Moreover, BrowerSpy can update and download malicious codes to control the computers to launch advanced persistent threat(APT) attacks.

The infected computers show no signs of abnormality, so it is very difficult to detect the malware, BKAV said, adding that users should update their anti-virus software.

Over 60 million computers in Vietnam are infected with malicious codes each year, the firm said, noting that the most common malicious codes are those used by hackers to mine digital currencies, encrypt data, steal personal information, spread viruses via USB drives, and launch APT attacks.

According to BKAV's calculation, malware infections made computer users in Vietnam to suffer losses of 12.3 trillion Vietnamese dong (544 million U.S. dollars) in 2017, up from 10.4 trillion Vietnamese dong in 2016.