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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

Malware

Privacy

Self-Protection Part 7

Self-Protection Part 7

Malware

Privacy

Self-Protection Part 7

David Harley • 05 Jan 2009


Scams

Twitter Security: Tweetie Pie Panic

Twitter Security: Tweetie Pie Panic

Scams

Twitter Security: Tweetie Pie Panic

David Harley • 05 Jan 2009


Malware

Digital Photo Frames and the Autorun Problem

Digital Photo Frames and the Autorun Problem

Malware

Digital Photo Frames and the Autorun Problem

David Harley • 04 Jan 2009


Scams

10 Ways to Protect Yourself: Part 6

10 Ways to Protect Yourself: Part 6

Scams

10 Ways to Protect Yourself: Part 6

David Harley • 04 Jan 2009


Scams

10 Ways to Protect Yourself: Part 5

10 Ways to Protect Yourself: Part 5

Scams

10 Ways to Protect Yourself: Part 5

David Harley • 03 Jan 2009


It's Scam Time!!!

It's Scam Time!!!

It's Scam Time!!!

ESET Research • 02 Jan 2009


10 Ways to Protect Yourself: Part 4

10 Ways to Protect Yourself: Part 4

10 Ways to Protect Yourself: Part 4

David Harley • 02 Jan 2009


Malware

Ten Ways to Protect Yourself: Part 3

Ten Ways to Protect Yourself: Part 3

Malware

Ten Ways to Protect Yourself: Part 3

David Harley • 01 Jan 2009


Cybercrime

Castlecops: more comments

Castlecops: more comments

Cybercrime

Castlecops: more comments

David Harley • 01 Jan 2009


Cybercrime

MD5/SSL: is the sky falling?

MD5/SSL: is the sky falling?

Cybercrime

MD5/SSL: is the sky falling?

David Harley • 31 Dec 2008


Malware

Cybercrime

Ten Ways to Protect Yourself: Part 2

Ten Ways to Protect Yourself: Part 2

Malware

Cybercrime

Ten Ways to Protect Yourself: Part 2

David Harley • 31 Dec 2008


%$^& is Fine for Cussing, But Not a Great Password

%$^& is Fine for Cussing, But Not a Great Password

%$^& is Fine for Cussing, But Not a Great Password

ESET Research • 30 Dec 2008

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