May 5, 2026
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Cyber Security

Backdoor Threat Hits Popular Windows Tool

A major supply chain attack has compromised Daemon Tools allowing hackers to spread malware through trusted software updates worldwide.

Affan Ahmad, Senior Technical Writer

A widely used everyday software tool has quietly become a gateway for hackers putting thousands of systems at risk.

Hidden Malware Inside Trusted Software

Security researchers at Kaspersky have uncovered a malicious backdoor embedded in Daemon Tools, a long-standing Windows application.

The attack is not isolated. It is described as:

  • Widespread across global systems
  • Affecting thousands of computers
  • Still actively ongoing

How the Attack Works

Hackers compromised the software supply chain, meaning users unknowingly installed infected versions through legitimate updates.

Once inside, the backdoor allows attackers to:

  • Deploy additional malware
  • Gain deeper system access
  • Target specific organizations
  • Targeted Sectors and Regions

Although broadly distributed, the attack shows signs of precision targeting:

Industries: retail scientific manufacturing government
Locations: Russia Belarus Thailand

Researchers believe the attackers are linked to a Chinese-speaking group based on malware analysis.

A Growing Cybersecurity Trend

This incident highlights a broader shift in cyberattacks:

  • Hackers target software developers instead of individuals
  • Malicious updates spread to large user bases instantly

Similar attacks recently impacted tools like Notepad++ and CPUID utilities.

Current Status

Kaspersky confirmed:

  • The backdoor was detected on April 8
  • The threat is still active
  • Disc Soft is investigating

Why It Matters

Supply chain attacks are particularly dangerous because they exploit trust. Users install updates expecting security improvements, not hidden threats.

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