Tessian Cloud Email Security intelligently prevents advanced email threats and protects against data loss, to strengthen email security and build smarter security cultures in modern enterprises.
Anyone can make a simple mistake. Attach the wrong file, click a bad link, or send an email to the wrong person. Tessian’s own research found that for an organization of around 1000 people, 800 misdirected emails were sent in 12 months. What’s more, employees also receive an average of 14 malicious emails per year, with some industries such as retail receiving an average of 49. Here then, are real life examples of when someone made a simple mistake, as well as the fall out from that.
Read more about different types of insider threats, and why inside threat management matters here.
The employee who fell for a phishing attack
The Anti-Phishing Working Group’s new Phishing Activity Trends Report reveals that in the third quarter of 2022, they observed 1,270,883 total phishing attacks — the worst quarter for phishing that the APWG has ever observed. While shocking in numbers, these aren’t particularly new threats.
One example involves an email that was sent to a senior staff member at Australian National University. The result? 700 Megabytes of data were stolen. That might not sound like a lot, but the data was related to both staff and students and included details like names, addresses, phone numbers, dates of birth, emergency contact numbers, tax file numbers, payroll information, bank account details, and student academic records.
The employee who accidentally sent an email to the wrong person
Misdirected emails happen more than most think. In fact, Tessian platform data shows that at least 800 misdirected emails are sent every year in organizations with 1,000 employees. But, what are the implications? It depends on what data has been exposed. In one incident in mid-2019, the private details of 24 NHS employees were exposed after someone in the HR department accidentally sent an email to a team of senior executives. This included mental health information and surgery information. While the employee apologized, the exposure of PII like this can lead to medical identity theft and even physical harm to the patients. We outline even more consequences of misdirected emails in this article.
The employee who sent company data to a personal email account
We mentioned earlier that employees oftentimes email company data to themselves to work over the weekend. But, in this incident, an employee at Boeing shared a spreadsheet with his wife in hopes that she could help solve formatting issues. While this sounds harmless, it wasn’t. The personal information of 36,000 employees were exposed, including employee ID data, places of birth, and accounting department codes.
The employees who exposed 250 million customer records
Here’s an example of a “negligent insider” threat. In December 2019, a researcher from Comparitech noticed that around 250 million Microsoft customer records were exposed on the open web. This vulnerability meant that the personal information of up to 250 million people—including email addresses, IP addresses, and location—was accessible to anyone. This incident represents a potentially serious breach of privacy and data protection law and could have left Microsoft customers open to scams and phishing attacks—all because the relevant employees failed to secure the databases properly. Microsoft reportedly secured the information within 24 hours of being notified about the breach.
The work-from-home employees duped by a vishing scam
Cybercriminals saw an opportunity when many of Twitter’s staff started working from home. One cybercrime group conducted one of the most high-profile hacks of 2020 — knocking 4% off Twitter’s share price in the process. In July 2020, after gathering information on key home-working employees, the hackers called them up and impersonated Twitter IT administrators. During these calls, they successfully persuaded some employees to disclose their account credentials.
Using this information, the cybercriminals logged into Twitter’s admin tools, changed the passwords of around 130 high-profile accounts — including those belonging to Barack Obama, Joe Biden, and Kanye West — and used them to conduct a Bitcoin scam. This incident put “vishing” (voice phishing) on the map, and it reinforces what all cybersecurity leaders know — your company must apply the same level of cybersecurity protection to all its employees, whether they’re working on your premises or in their own homes.
The employee offered a bribe by a Russian national
In September 2020, a Nevada court charged Russian national Egor Igorevich Kriuchkov with conspiracy to intentionally cause damage to a protected computer. The court alleges that Kruichkov attempted to recruit an employee of Tesla’s Nevada Gigafactory.
Kriochkov and his associates reportedly offered a Tesla employee $1 million to “transmit malware” onto Tesla’s network via email or USB drive to “exfiltrate data from the network.” The Kruichkov conspiracy was disrupted before any damage could be done.
But it wasn’t the first time Tesla had faced an insider threat. In June 2018, CEO Elon Musk emailed all Tesla staff to report that one of the company’s employees had “conducted quite extensive and damaging sabotage to [Tesla’s] operations.” With state-sponsored cybercrime syndicates wreaking havoc worldwide, we could soon see further attempts to infiltrate companies. That’s why it’s crucial to run background checks on new hires and ensure an adequate level of internal security.
The employee who accidentally misconfigured access privileges
NHS coronavirus contact-tracing app details were leaked after documents hosted in Google Drive were left open for anyone with a link to view. Worse still, links to the documents were included in several others published by the NHS. These documents – marked “SENSITIVE” and “OFFICIAL” contained information about the app’s future development roadmap and revealed that officials within the NHS and Department of Health and Social Care are worried about the app’s reliance and that it could be open to abuse that leads to public panic.
Read more on how Tessian stops misdirected emails here, or download the data sheet with more information.