The Macnica-backed cybersecurity software developer has raised $21m in funding from existing investors, just five months after closing its series B round.

Attivo Networks, a US-based cybersecurity technology developer that counts semiconductor supplier Macnica among its investors, secured $21m yesterday in a series C round led by venture capital fund Trident Capital Cybersecurity.

The round also featured investment firm Omidyar Technology Ventures and Bain Capital Ventures, the VC unit run by private equity firm Bain Capital.

Attivo’s ThreatDefend software detects security breaches and threats, using deception technology to form lures and traps intended to get cyber attackers to reveal themselves, before responding…