In a bid to aid its security capabilities as businesses deal with an increasing number of online threats, Israeli cloud cyber-security start-up, Adallom, has been acquired by Microsoft.

"With more frequent and advanced cyber-security attacks continuing to make headlines, customer concerns around security remain top of mind," Takeshi Numoto, corporate vice president of cloud and enterprise marketing at Microsoft, wrote in a blog post.

Adallom is the most recent company purchased by Microsoft, having been on a buying spree this past year as the company pushes its rapidly growing businesses.

The company's commercial cloud revenue grew 88 percent year-on-year for Microsoft in the fourth quarter. This includes Office 365, their suite of business productivity applications such as email and its cloud platform, Azure.

The acquisition comes as Microsoft continues to diversify its business away from only its Windows operating system and struggling smartphone group. Adallom's solutions would expand Microsoft's range of cyber-security solutions to businesses as it continues to fixate on pushing its products and services to enterprises.