A Silicon Valley firm has put some San Diego know-how into a new tool to detect malicious software.

Blue Coat Systems Inc. of Sunnyvale said it has introduced malware-analysis software powered by San Diego-based Norman Shark. Financial terms of the deal were not disclosed. Norman Shark developed much of the software in San Diego, said Torjus Gylstorff, Norman Shark’s vice president of global sales.

Blue Coat’s Content Analysis System is for large computer enterprises. The product blocks known threats while detecting and analyzing new and advanced malware. The Blue Coat software shares intelligence about new threats with Blue Coat’s 15,000 other users.

The product uses Norman Shark’s “sandbox emulation” feature, which can expose malware, including malware that employs evasive techniques.

Blue Coat Systems says that 86 percent of the Fortune Global 500 companies use its products. The Silicon Valley company has more than 1,300 employees.

Norman Shark is an outgrowth of Norway-based Norman AS, which moved its U.S. office from Washington, D.C. to San Diego in September 2012. Norman Shark split off from Norman in January. Norman Shark does not disclose revenue. Gylstorff said the company was enjoying double-digit growth.

Gylstorff declined to say how many employees the business has. Norman Shark has positions open on its development team and continues to expand the San Diego office, he said. One benefit of being in San Diego is an “impressive” talent pool, Gylstorff said.

— Brad Graves