Last updated: June 15, 2026
The biggest cybersecurity incidents of 2024 included the Salt Typhoon US telecom breach, the CrowdStrike global IT outage, ransomware on Indonesia’s national data center, and data breaches hitting the UK military and 33 million French citizens. Together they exposed how state-sponsored attackers, third-party vendors, and software supply chains now threaten critical infrastructure, making proactive cybersecurity essential for every business.
TL;DR. The major 2024 cyber incidents ranged from nation-state telecom espionage (Salt Typhoon) to a self-inflicted software outage (CrowdStrike) and large-scale data theft across government and healthcare. The common thread was simple. Phishing, weak vendor security, and untested updates opened the door. The organizations that trained their staff, vetted their vendors, kept offline backups, and monitored systems around the clock are the ones that recovered fastest.
In 2024, cyber threats reached new levels of severity, with some of the most damaging attacks in history. These attacks targeted governments, organizations, and individuals, highlighting the growing risks in the digital world. The scale and impact of these breaches made it clear that cybersecurity resilience is no longer optional but essential. Many businesses and governments felt the effects, from data loss to financial damage. The following are seven major cyber events from 2024, their consequences, and key lessons for improving cybersecurity.
Overview of the Top Cybersecurity Incidents in 2024
Here is a snapshot of the major incidents. Each one below covers what happened, who was behind it, and the practical lesson your business can apply to avoid the same fate.
| Date | Incident | Bad Actor | Impact | Potential Loss |
| November 2024 | US Telecom Breach | Chinese hackers (Salt Typhoon) | Accessed sensitive call data and wiretapping systems | Still under assessment |
| October 2024 | Ukrainian Recruitment Disruption | Russian hackers (UNC5812) | Phishing campaign disrupted military recruitment | Undisclosed |
| July 2024 | CrowdStrike Global IT Outage | Faulty update | IT disruptions in major industries worldwide | $5.4 billion |
| June 2024 | Indonesia National Data Center Ransomware | Unknown hackers | Disrupted 282 public services | National crisis and data loss |
| May 2024 | UK Ministry of Defense Data Breach | Chinese hackers | Payroll records of 270,000 military personnel exposed | Raised security concerns |
| March 2024 | Israeli Nuclear Facility Network Breach | Iranian hackers | Leaked documents from nuclear facility | Future attack risks |
| February 2024 | French Citizen Data Breach | Unknown hackers | Exposed data of 33 million citizens | Significant reputational damage |
1. Chinese Hackers Breach U.S. Telecom Providers
In November 2024, the Chinese hacking group Salt Typhoon compromised sensitive call data, wiretapping systems, and private communications across US telecom networks.
Details
This was a very sophisticated attack by the group known as the Salt Typhoon hackers, executed on at least eight U.S. telecom providers. The hacking operation used exploits in telecom networks to obtain sensitive information without permission. This sensitive information included call records and court-ordered wiretapping systems. The incident leaked private communication from high-profile individuals, causing a huge scare over national security threats. The attack highlighted weaknesses in critical infrastructure, specifically in the case of state-sponsored actors.
Lesson Learned
Organizations conducting critical infrastructure operations should prioritize the following.
- Multi-layered security deployment.
- Periodic network security audits.
- Immediate detection and response to unauthorized activity.
2. Russian Hackers Target Ukrainian Draft-Age Men
In October 2024, the Russian group UNC5812 ran a phishing campaign that halted Ukrainian military recruitment and stole personal details from draft-age men.
Details
UNC5812, a Russian hacking group, is behind this phishing campaign against men of Ukrainian draft age. They used a Telegram channel and a malicious application disguised as tools capable of monitoring recruiters. Because these looked like trusted tools, login credentials were stolen along with malware that tracked locations and recorded phone conversations. The activity crippled the military recruitment program when the country needed soldiers most. This theft of sensitive information for use in propaganda added fuel to the fire and further heightened the conflict in that region.
Lesson Learned
Phishing remains one of the primary methods attackers rely on, so organizations and governments must act on several fronts.
- Educate employees and the public about phishing awareness.
- Implement endpoint detection and response tools.
- Use secure communication tools that include adequate verification steps.
3. CrowdStrike Software Update Causes Global IT Outage
In July 2024, a faulty CrowdStrike software update triggered shutdowns across dozens of sectors and roughly 5.4 billion dollars in losses.
Details
A worldwide IT shutdown hit devices to the tune of 8.5 million, following a bad software update by cybersecurity firm CrowdStrike. The most common symptom was the BSOD, commonly known as the “blue screen of death.” The failure crippled airlines, public transportation systems, hospitals, and financial centers. The impact was economic, with losses estimated above $5.4 billion, making this one of the costliest cybersecurity-related cases of the year.
Lesson Learned
Industry giants do not have exclusivity over flaws, so organizations should build safeguards into the way they ship updates.
- Test updates in controlled, isolated conditions before release.
- Build a rollback path for failed updates.
- Keep clear, honest communication with all stakeholders involved.
4. Indonesia’s National Data Center Hit by Ransomware
In June 2024, unknown hackers used ransomware to disrupt public services and cause critical data loss at Indonesia’s national data center.
Details
Indonesia’s Temporary National Data Center was paralyzed after an attack by the Brain Cipher ransomware. Systems including immigration and student registration portals went down, while airport operations also came to a standstill. Hackers initially demanded an $8 million ransom, but the government refused to pay. The attackers eventually released a decryption key, though significant data loss had already occurred, sparking national outrage and forcing the resignation of senior officials.
Lesson Learned
Ransomware incidents reinforce a few non-negotiable essentials.
- Keep regular backups stored offline.
- Run continuous employee training to reduce phishing risk.
- Maintain strong incident response plans to handle a crisis effectively.
5. Chinese Hackers Breach the UK Ministry of Defense
In May 2024, Chinese hackers exposed payroll data for 270,000 UK military personnel through a compromised contractor.
Details
A third-party contractor, Shared Services Connected Ltd (SSCL), was compromised when hackers exploited vulnerabilities in the company’s systems and gained access to Britain’s Ministry of Defense. Sensitive payroll records of active and retired personnel, including personal home addresses, were stolen, creating a grave national security issue. The breach went unchecked for months and revealed significant flaws in both the contractor’s and the government’s detection and response practices.
Lesson Learned
The breach underscores several priorities for any organization that depends on outside vendors.
- Assess the cybersecurity posture of third-party partners.
- Use zero-trust networks to isolate access.
- Run continuous privileged access monitoring.
6. Iranian Hackers Compromise Israeli Nuclear Facility Network
In March 2024, Iranian hackers exfiltrated documents from an Israeli nuclear facility, though operational systems stayed unaffected.
Details
Hackers from Iran targeted the Shimon Peres Negev Nuclear Research Center in Israel. Although they hacked in and released thousands of confidential documents, they did not reach the operational systems. The breach escalated cyber warfare between Iran and Israel. The leaked documents were not highly sensitive, but they could still be used in phishing or social engineering later.
Lesson Learned
Entities that handle highly sensitive systems should take clear, deliberate steps.
- Use segmented networks to separate vital systems.
- Update and patch software promptly to fix vulnerabilities.
- Stage red team exercises to mimic advanced persistent threat (APT) breaches.
7. Data Breach Affects 33 Million French Citizens
In February 2024, anonymous hackers compromised the sensitive private data of 33 million French citizens through two payment processors.
Details
A huge data attack made public the private information of 33 million French citizens who rely on two French payment processors, Viamedis and Almerys. The exposed data included social security numbers, marital status, and birth dates. The incident was traced to a phishing attack where human error and a few security holes in the medical portal were exploited. According to reports, the hackers did not retrieve banking details or medical records.
Lesson Learned
Health care organizations have to shore up defenses in several ways.
- Strengthen access controls on portals that hold sensitive data.
- Conduct regular penetration testing to uncover weaknesses.
- Train employees to recognize and avoid phishing scams.
How Uprite IT Services Protects Your Business
As cyber threats continue to evolve, protecting your business is no longer optional, it is a necessity. At Uprite IT Services, we lead with proactive cybersecurity, backed by fully managed IT services and solutions tailored to your needs.
Why Choose Uprite IT Services
- Comprehensive defense strategies that layer firewalls, antivirus systems, and endpoint security.
- Around-the-clock monitoring that delivers timely detection and immediate response to threats.
- Employee training that teaches your team practical habits so they make fewer mistakes.
- Incident response planning that supports you at every stage, from detection through mitigation.
2024 Cyberattacks: Quick Answers
What was the costliest cybersecurity incident of 2024?
The CrowdStrike outage in July 2024 was the costliest, with insurers estimating roughly $5.4 billion in losses for US Fortune 500 companies. A faulty software update crashed about 8.5 million Windows devices and grounded airlines, hospitals, and banks worldwide.
What is Salt Typhoon?
Salt Typhoon is a Chinese state-sponsored hacking group. In late 2024 it breached at least eight US telecom providers, reaching call records and the court-ordered wiretap systems that carriers are legally required to maintain.
How many people were affected by the French data breach?
Around 33 million people, nearly half of France’s population. Attackers used phishing to reach the payment processors Viamedis and Almerys, exposing names, dates of birth, marital status, and social security numbers, though no banking data.
What do most of these 2024 attacks have in common?
Phishing and third-party weaknesses. Several incidents, including the Ukraine recruitment campaign, the UK Ministry of Defense breach, and the French exposure, started with a phishing email or a compromised vendor rather than a direct hit on the main target.
What is the biggest lesson from the 2024 cybersecurity incidents?
No organization is too big or too secure to be breached. Layered defenses, vendor risk reviews, offline backups, and a tested incident response plan separated the companies that recovered quickly from those that did not.
How can a small or midsize business defend against these threats?
Start with the basics that stopped most 2024 attacks, including employee phishing training, multi-factor authentication, offline backups, and around-the-clock monitoring. A managed security partner can run these continuously so a single mistake does not become a breach.
Worried Your Business Could Be Next?
Get a no-pressure cybersecurity assessment from Uprite and find the gaps before attackers do. Talk to a cybersecurity expert or call (866) 570-3065.
Conclusion
The cybersecurity breaches of 2024 revealed weaknesses in both private and public organizations. They highlight the importance of strong defenses, well-trained employees, and acting on digital risks proactively. Studying these incidents helps organizations understand new threats and how to mitigate them, and our guide on how to protect your SMB from cyberthreats is a practical next step. When you need professional IT services, Uprite Services is here for you. With modern tools and continuous support, we help businesses safeguard their data and stay ahead of cyber threats.
