INSIDER THREAT INCIDENTS REPORT FOR OCTOBER – NOVEMBER 2025
Produced By:
National Insider Threat Special Interest Group
Insider Threat Defense Group
West Palm Beach, Florida, December 2, 2025 – The monthly reports published by the National Insider Threat Special Interest Group (NITSIG) provide clear and indisputable evidence of how very costly and damaging Insider Threat incidents can be to organizations of all types and sizes.
The survivability of an organization that encounters the malicious actions of an employee, could be in serious jeopardy. The financial impacts from malicious employees actions are into the MILLIONS to BILLIONS. Some companies have had large layoffs of gone out of business.
In todays business environment, technology is now a core competency that drives the success of the business. Technology drives the mission of the business, revenue, advancement and growth, customer satisfaction and much more. Unfortunately malicious Insiders can also use technology in many ways that can severely impact an organization as this report will show.
Protecting a companies assets is longer just a Security, CISO, IT Human Resources or Counterintelligence problem. Insider Threats must also be a CEO and board level problem that requires support, funding and oversight.
It is very apparent from the incidents listed below and on pages 4 to 32 of this report, that organizations should consider re-evaluating their security controls from a holistic approach (Non-Technical, Technical, Fraud Controls) to identify weaknesses and implement additional security controls to identify, detect, prevent and mitigate Insider Risks and Threats. Security goes beyond compliance regulations and requires “Thinking Outside The Box” as the employees did below.
EXAMPLES FROM REPORT / (STP = Sentenced To Prison)
* U.S. State Department Employee Arrested For Removing 1000+ Top Secret Classified Documents At Storing At Home
* Engineer STP For Stealing Trade Secret Technology Designed For Missile Launch And Detection For People’s Republic Of China Government
* General Manager For U.S. Defense Contractor L3Harris Pleads Guilty To Stealing & Selling Trade Secrets To Russian Broker
* Intel Files Lawsuit Against Former Employee Who Stole 18,000 Files From Internal Database
* Google Is Investigating A Security Breach Involving A Google Contractor Who Exfiltrated Nearly 2,000 Screenshots & Sensitive Internal Files
* Apple Engineer Stole Apple Watch Trade Secrets And Then Gave Presentation To 100 Employees At His New China Employer
* IT Department Contractor Employee Admits To Hacking His Employer In Retaliation For Termination / Caused $862,000+ Of Damages
* Disgruntled Employee STP For Remotely Releasing Toxic Chemicals Into Chicken Plant After Being Fired
* Employee Charged For Sabotaging Employers Network For 1 Year After Being Terminated / Caused Widespread Disruption To The Company Operations
* IT Employee Arrested For Selling Login Credentials To Hackers Who Stole $100 Million From PIX Banking Payment Systems
* Office Manager Pleads Guilty To Embezzling $1.7 Million+ By Forging Business Owner’s Signature On Checks 500 Times Over 8 Years / Used Funds For Personal Enrichment
* Office Manager Convicted Of Embezzling $1.4 Million / Used Funds To Pay Down Balances On Personal Credit Cards, Purchase 2 Houses, Cars, Etc.
* Chief Executive Officer For Large Steel Manufacturer Charged In $66 Million Fraud Scheme / Used Funds For Extravagant Lifestyle
* Chief Financial Officer STP For Embezzling $9 Million+ Over 5 Years / Used Funds To Purchase Luxury Goods
* County Schools Maintenance Employee Sentenced To Prison For $3.4+ Million Fraud Scheme / / Used Funds To Purchase Vehicles
* And Many More..
Download Report / No Registration Required
https://nationalinsiderthreatsig.org/pdfs/insider-threat-threats-incidents-report-disgruntled-malicious-employees%2011-30-25.pdf
Previous Reports / Specialized Reports
https://nationalinsiderthreatsig.org/nitsig-insiderthreatreportssurveys.html
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NITSIG – LINKEDIN GROUP FOR INSIDER RISK MANAGEMENT (IRM) & SECURITY PROFESSIONALS
This group is for individuals that are interested in sharing and gaining in-depth knowledge regarding IRM and IRM Programs. This group enables the NITSIG and its members to share the latest news, upcoming events and information for IRM. The group has 800+ members.
Link To Join Group
https://www.linkedin.com/groups/12277699
Contact Information
Jim Henderson, CISSP, CCISO
Founder / Chairman Of The National Insider Threat Special Interest Group
Insider Threat Researcher / Speaker
FBI InfraGard Member
[email protected]
www.nationalinsiderthreatsig.org
561-809-6800
