In the latest cybersecurity news, Colliers — a company operating in the CA — has fallen victim to a ransomware attack conducted by the group thegentlemen. This data breach, discovered on 2025-11-21 20:18:56.197751, underscores the increasing need for proactive cybersecurity defenses as we continue through 2025.
In response to increasing cyber threats, it’s critical to protect your organization with proactive security measures. HookPhish provides enterprise-grade solutions designed to reduce your risk of future attacks:
- Phishing Simulation – Test and improve employee readiness with realistic, controlled phishing campaigns.
- Cybersecurity Awareness Training – Educate your team to recognize and respond to common attack tactics.
- Data Breach Monitoring – Get real-time alerts if your organization’s data appears in public or dark web breaches.
- Phishing Detection and Response – Detect, investigate, and neutralize phishing threats before they cause damage.
Protect your organization before it becomes the next headline. Explore HookPhish.
Incident Report
| Attribute | Information |
|---|---|
| Target Organization | Colliers |
| Threat Group | thegentlemen |
| Summary | Stock Symbol CIGI Revenue $5.2 Billion colliers.com https://www.zoominfo.com/c/colliers-international-group-inc/12042840 Colliers International Group Inc. provides commercial real estate services to corporations, financial institutions, governments, and individuals worldwide. The companys Sales and Lease Brokerage division offers transaction brokerage services, including landlord representation, tenant representation, and capital markets and investment services, as well as property management, leasing, and valuations. This division provides its services for various asset classes, including office, industrial, retail, multi-family, hotel, and mixed-use properties. Its Outsourcing & Advisory Services division offers portfolio management, transaction and project management, workplace solutions, strategic consulting, property and asset management, and other corporate real estate services, as well as lease administration and facilities management systems; and valuation and appraisal review and management, portfolio or single asset valuation, arbitration and consulting, various studies, tax appeals etc. |
| Date of Breach | 2025-02-19 00:00:00.000000 |
| Discovery Date | 2025-11-21 20:18:56.197751 |
| Region | CA |
| Target Domain | www.zoominfo.com |
| Business Sector | Business Services |
Don’t wait for a breach to take action — stay informed and take control of your cybersecurity posture today.
You can also check if your organization’s data has been exposed using our free Data Breach Checker.
Disclaimer: HookPhish does not engage in the exfiltration, downloading, taking, hosting, viewing, reposting, or disclosure of any stolen information. All breach data reported here is sourced from publicly available threat intelligence feeds for awareness purposes only.
