Hackers Install Secret Backdoor on Thousands of Microsoft SQL Servers

Cybersecurity researchers today uncovered a sustained malicious campaign dating back to May 2018 that targets Windows machines running MS-SQL servers to deploy backdoors and other kinds of malware, including multi-functional remote access tools (RATs) and cryptominers.

Named “Vollgar” after the Vollar cryptocurrency it mines and its offensive “vulgar” modus operandi, researchers at Guardicore Labs said the attack employs password brute-force to breach Microsoft SQL servers with weak credentials exposed to the Internet.

Book a demo today to see GlobalDots is action.

Optimize cloud costs, control spend, and automate for deeper insights and efficiency.

Book a demo today to see GlobalDots is action.

Researchers claim the attackers managed to successfully infect nearly 2,000-3,000 database servers daily over the past few weeks, with potential victims belonging to healthcare, aviation, IT & telecommunications, and higher education sectors across China, India, the US, South Korea, and Turkey.

Read more: The Hacker News

Latest Articles

The Security Blind Spot: Business Logic Failures and How to Catch Them

Security leaders know the drill: vulnerability scanners run their course, reports stack up, and yet attackers still slip through. What’s going wrong? We sat down with Yosef Yekutiel, CISO & Data Privacy Officer at MaccabiDent, at GlobalDots’ recent “Red Team Reality Check” event to unpack this gap, and how modern offensive security can fill it. […]

Ganesh The Awesome
27th August, 2025
How NetRefer Cut Observability Costs by €96,000 Per Year in Just 3 Months with GlobalDots

Overview NetRefer, a leading iGaming affiliate marketing platform, utilized Azure cloud-native monitoring tools. Shortcomings needed to be resolved, and the business required next-generation observability.  Problems that needed to be solved: Through GlobalDots’ expertise in selecting and implementing the right observability solution, NetRefer achieved €96,000 in annual savings and gained real-time observability across their entire platform […]

Ganesh The Awesome
24th July, 2025
Vulnerability Assessments vs. Penetration Testing: Key Differences, Use Cases & Best Practices

They’re not interchangeable. A vulnerability assessment identifies known flaws at scale. A penetration test mimics an actual attacker probing for impact. Yet many teams treat them the same. They substitute one for the other, check a compliance box, and move on as if they’re covered. They’re not. And that gap shows up later in real-world […]

Ganesh The Awesome
7th July, 2025
Web Application Firewalls (WAFs): The Evolving First Line of Defense in Cloud Security

Modern applications are built for speed, not simplicity. Containers, microservices, and cloud-native deployments have blown up the security perimeter. Traditional tools can’t keep up with this complexity. That’s why Web Application Firewalls (WAFs) matter. But the WAF of 2025 isn’t just an appliance sitting in front of a static website. It’s a flexible, cloud-aware security […]

Ganesh The Awesome
7th July, 2025

Unlock Your Cloud Potential

Schedule a call with our experts. Discover new technology and get recommendations to improve your performance.

    GlobalDots' industry expertise proactively addressed structural inefficiencies that would have otherwise hindered our success. Their laser focus is why I would recommend them as a partner to other companies

    Marco Kaiser
    Marco Kaiser

    CTO

    Legal Services

    GlobalDots has helped us to scale up our innovative capabilities, and in significantly improving our service provided to our clients

    Antonio Ostuni
    Antonio Ostuni

    CIO

    IT Services

    It's common for 3rd parties to work with a limited number of vendors - GlobalDots and its multi-vendor approach is different. Thanks to GlobalDots vendors umbrella, the hybrid-cloud migration was exceedingly smooth

    Motti Shpirer
    Motti Shpirer

    VP of Infrastructure & Technology

    Advertising Services