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Cybersecurity research and insight for the AI era · <a href='https://www.eset.com/blog/en/' target='_blank'>Moving soon to the ESET Blog</a>

MythicRatatoskr: An Yggdrasil-enabled backdoor deployed in a UAC-0099-Sandworm collaboration
Anton Cherepanov

Anton Cherepanov and Peter Strýček • 22 Oct 2026 • 16 min. read

ESET Research

MythicRatatoskr: An Yggdrasil-enabled backdoor deployed in a UAC-0099-Sandworm collaboration

Anton Cherepanov and Peter Strýček • 22 Oct 2026 • 16 min. read

MATCHBOIL: New tricks, same old evil intentions
Fernando Tavella

Fernando Tavella • 08 Oct 2026 • 15 min. read

ESET Research

MATCHBOIL: New tricks, same old evil intentions

Fernando Tavella • 08 Oct 2026 • 15 min. read

Beware the SparroWock: The backdoor that bites, the commands that catch
Alexandre Côté Cyr

Alexandre Côté Cyr and Romain Dumont • 17 Sep 2026 • 17 min. read

ESET Research

Beware the SparroWock: The backdoor that bites, the commands that catch

Alexandre Côté Cyr and Romain Dumont • 17 Sep 2026 • 17 min. read

The SMB cybersecurity squeeze: AI agents at work, old attacks in overdrive

Business Security

The SMB cybersecurity squeeze: AI agents at work, old attacks in overdrive

GuardBreaker: Derailing AI-assisted malware analysis with a code comment

Business Security

GuardBreaker: Derailing AI-assisted malware analysis with a code comment

Latest Articles

A Deeper Look at Win32/Inject.NBL

A Deeper Look at Win32/Inject.NBL

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False positive

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David Harley • 27 Aug 2008


In Space, No-one Can Hear You Scream "Virus!"

In Space, No-one Can Hear You Scream "Virus!"

In Space, No-one Can Hear You Scream "Virus!"

David Harley • 27 Aug 2008


Testing Standards Revisited

Testing Standards Revisited

Testing Standards Revisited

David Harley • 26 Aug 2008


Myfotoos Live Messenger Worm

Myfotoos Live Messenger Worm

Myfotoos Live Messenger Worm

David Harley • 26 Aug 2008


Fake anti-malware

Fake anti-malware

Fake anti-malware

David Harley • 24 Aug 2008


Beware of Fake Invoices

Beware of Fake Invoices

Beware of Fake Invoices

Pierre-Marc Bureau • 22 Aug 2008


Negative Values: Racing Past Zero

Negative Values: Racing Past Zero

Negative Values: Racing Past Zero

David Harley • 10 Aug 2008


Adware, Spyware and Possibly Unwanted Applications

Adware, Spyware and Possibly Unwanted Applications

Adware, Spyware and Possibly Unwanted Applications

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Global Threat Report - Half Year

Global Threat Report - Half Year

Global Threat Report - Half Year

David Harley • 08 Aug 2008


Apple Crumble?

Apple Crumble?

Apple Crumble?

David Harley • 07 Aug 2008


A Departure (sniffle)...

A Departure (sniffle)...

A Departure (sniffle)...

David Harley • 05 Aug 2008

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