Lukas Stefanko

Lukas Stefanko

Malware Researcher


Education: Masters in Informatic Engineering of the Technical University in Kosice

Highlights of your career? Malware Researcher

Position and history at ESET? Joined ESET as a Malware Researcher in 2011

What malware do you hate the most? Adware and ransomware

Favorite activities? Gym, squash, reading

What is your golden rule for cyberspace? Be reasonably paranoid

Favorite computer game/activity? Elasto Mania


79 articles by Lukas Stefanko

BankBot trojan returns to Google Play with new tricks

BankBot trojan returns to Google Play with new tricks

BankBot trojan returns to Google Play with new tricks

The Android banking trojan that we first informed about in the beginning of this year has found its way to Google Play again and contains new tricks designed to get access to the private banking information of the user.

Lukas Stefanko • 25 Sep 2017 • 6 min. read


Turn the light on and give me your passwords!

Turn the light on and give me your passwords!

Turn the light on and give me your passwords!

ESET researchers have discovered another banking trojan on Google Play targeting Android users – this time disguised as a Flashlight widget.

Lukas Stefanko • 19 Apr 2017 • 5 min. read


Real or virtual currency? Scammers accept both

Real or virtual currency? Scammers accept both

Real or virtual currency? Scammers accept both

ESET researchers have discovered and reported scammers stealing PayPal and Paxful credentials disguised as a tool for YouTube monetization, and a bitcoin trading marketplace.

Lukas Stefanko • 13 Apr 2017 • 5 min. read


If you download Minecraft mods from Google Play, read on …

If you download Minecraft mods from Google Play, read on …

If you download Minecraft mods from Google Play, read on …

ESET researchers have discovered 87 malicious apps on Google Play disguised as mods for Minecraft.

Lukas Stefanko • 23 Mar 2017 • 4 min. read


New Instagram credential stealers discovered on Google Play

New Instagram credential stealers discovered on Google Play

New Instagram credential stealers discovered on Google Play

ESET researchers discovered 13 new Instagram credential stealers on Google play and looked into the motivations behind their fraudulent schemes.

Lukas Stefanko • 09 Mar 2017 • 3 min. read


Aggressive ad-displaying Google Play app tricks users into leaving high ratings

Aggressive ad-displaying Google Play app tricks users into leaving high ratings

Aggressive ad-displaying Google Play app tricks users into leaving high ratings

ESET researchers have observed an increased number of apps on Google Play using social engineering techniques to boost their ratings, ranging from legitimate apps, through adware to malware.

Lukas Stefanko • 08 Mar 2017 • 4 min. read


Talking Android ransomware extorts victims

Talking Android ransomware extorts victims

Talking Android ransomware extorts victims

Talking Android ransomware sounds like something out of a science fiction movie. It's not - it's very real, explains ESET's Lukas Stefanko.

Lukas Stefanko • 01 Mar 2017 • 4 min. read


Released Android malware source code used to run a banking botnet

Released Android malware source code used to run a banking botnet

Released Android malware source code used to run a banking botnet

ESET researchers have discovered a new variant of botnet-forming Android banking malware based on source code made public a couple of months ago.

Lukas Stefanko • 23 Feb 2017 • 7 min. read


Sunny with a chance of stolen credentials: Malicious weather app found on Google Play

Sunny with a chance of stolen credentials: Malicious weather app found on Google Play

Sunny with a chance of stolen credentials: Malicious weather app found on Google Play

ESET has spotted a new banking malware on Google Play. Disguised as a weather forecast app, it steals banking credentials and locks screens.

Lukas Stefanko • 22 Feb 2017 • 4 min. read