Peter Strýček

Peter Strýček

Malware Researcher



6 articles by Peter Strýček

LongNosedGoblin tries to sniff out governmental affairs in Southeast Asia and Japan

LongNosedGoblin tries to sniff out governmental affairs in Southeast Asia and Japan

LongNosedGoblin tries to sniff out governmental affairs in Southeast Asia and Japan

ESET researchers discovered a China-aligned APT group, LongNosedGoblin, which uses Group Policy to deploy cyberespionage tools across networks of governmental institutions

Anton Cherepanov and Peter Strýček • 18 Dec 2025 • 18 min. read


First known AI-powered ransomware uncovered by ESET Research

First known AI-powered ransomware uncovered by ESET Research

First known AI-powered ransomware uncovered by ESET Research

The discovery of PromptLock shows how malicious use of AI models could supercharge ransomware and other threats

Anton Cherepanov and Peter Strýček • 26 Aug 2025 • 2 min. read


Update WinRAR tools now: RomCom and others exploiting zero-day vulnerability

Update WinRAR tools now: RomCom and others exploiting zero-day vulnerability

Update WinRAR tools now: RomCom and others exploiting zero-day vulnerability

ESET Research discovered a zero-day vulnerability in WinRAR being exploited in the wild in the guise of job application documents; the weaponized archives exploited a path traversal flaw to compromise their targets

Anton Cherepanov, Peter Strýček, Damien Schaeffer • 11 Aug 2025 • 8 min. read


Bootkitty: Analyzing the first UEFI bootkit for Linux

Bootkitty: Analyzing the first UEFI bootkit for Linux

Bootkitty: Analyzing the first UEFI bootkit for Linux

ESET researchers analyze the first UEFI bootkit designed for Linux systems

Martin Smolár and Peter Strýček • 27 Nov 2024 • 13 min. read


The tap-estry of threats targeting Hamster Kombat players

The tap-estry of threats targeting Hamster Kombat players

The tap-estry of threats targeting Hamster Kombat players

ESET researchers have discovered threats abusing the success of the Hamster Kombat clicker game

Lukas Stefanko and Peter Strýček • 23 Jul 2024 • 10 min. read


Not-so-private messaging: Trojanized WhatsApp and Telegram apps go after cryptocurrency wallets

Not-so-private messaging: Trojanized WhatsApp and Telegram apps go after cryptocurrency wallets

Not-so-private messaging: Trojanized WhatsApp and Telegram apps go after cryptocurrency wallets

ESET researchers analyzed Android and Windows clippers that can tamper with instant messages and use OCR to steal cryptocurrency funds

Lukas Stefanko and Peter Strýček • 16 Mar 2023 • 17 min. read