2020 Colliers International Group — North America cyber event and Nefilim dark-web listing
Data compromised
Corporate file shares per actor claims—no consolidated regulator numerator in first-wave reporting
Technical writeup
Commercial real estate advisor Colliers shuttered portions of North American IT after detecting a November 2020 security event while trade and insurance press linked timing to Nefilim/Netfilim extortion branding on partner leak trackers. Corporate statements emphasized forensic rebuild of enterprise systems with limited public quantification of exfiltrated material amid ongoing third-party triage.
Root cause
Sophisticated intrusion characterized in coverage as criminal encryption/extortion activity (Nefilim-associated marketing on dark portals)