Phishing, privileges and passwords: Why identity is critical to improving cybersecurity posture

Identity is effectively the new network boundary. It must be protected at all costs.

MuddyWater: Snakes by the riverbank

MuddyWater targets critical infrastructure in Israel and Egypt, relying on custom malware, improved tactics, and a predictable playbook

Oversharing is not caring: What’s at stake if your employees post too much online

From LinkedIn to X, GitHub to Instagram, there are plenty of opportunities to share work-related information. But posting could also get your company into trouble.

Influencers in the crosshairs: How cybercriminals are targeting content creators

Social media influencers can provide reach and trust for scams and malware distribution. Robust account protection is key to stopping the fraudsters.

MDR is the answer – now, what’s the question?

Why your business needs the best-of-breed combination of technology and human expertise

The OSINT advantage: Find your weak spots before attackers do

Here’s how open-source intelligence helps trace your digital footprint and uncover your weak points, plus a few essential tools to connect the dots

PlushDaemon compromises network devices for adversary-in-the-middle attacks

ESET researchers have discovered a network implant used by the China-aligned PlushDaemon APT group to perform adversary-in-the-middle attacks

What if your romantic AI chatbot can’t keep a secret?

Does your chatbot know too much? Here's why you should think twice before you tell your AI companion everything.

How password managers can be hacked – and how to stay safe

Look no further to learn how cybercriminals could try to crack your vault and how you can keep your logins safe

Why shadow AI could be your biggest security blind spot

From unintentional data leakage to buggy code, here’s why you should care about unsanctioned AI use in your company

In memoriam: David Harley

Former colleagues and friends remember the cybersecurity researcher, author, and mentor whose work bridged the human and technical sides of security

ESET APT Activity Report Q2 2025–Q3 2025

An overview of the activities of selected APT groups investigated and analyzed by ESET Research in Q2 2025 and Q3 2025

Sharing is scaring: The WhatsApp scam you didn’t see coming

How a fast-growing scam is tricking WhatsApp users into revealing their most sensitive financial and other data

Ground zero: 5 things to do after discovering a cyberattack

When every minute counts, preparation and precision can mean the difference between disruption and disaster

Fraud prevention: How to help older family members avoid scams

Families that combine open communication with effective behavioral and technical safeguards can cut the risk dramatically

Recruitment red flags: Can you spot a spy posing as a job seeker?

Here’s what to know about a recent spin on an insider threat – fake North Korean IT workers infiltrating western firms

How MDR can give MSPs the edge in a competitive market

With cybersecurity talent in short supply and threats evolving fast, managed detection and response is emerging as a strategic necessity for MSPs

Gotta fly: Lazarus targets the UAV sector

ESET research analyzes a recent instance of the Operation DreamJob cyberespionage campaign conducted by Lazarus, a North Korea-aligned APT group

IT service desks: The security blind spot that may put your business at risk

Could a simple call to the helpdesk enable threat actors to bypass your security controls? Here’s how your team can close a growing security gap.

AI-aided malvertising: Exploiting a chatbot to spread scams

Cybercriminals have tricked X’s AI chatbot into promoting phishing scams in a technique that has been nicknamed “Grokking”. Here’s what to know about it.

How Uber seems to know where you are – even with restricted location permissions

Is the ride-hailing app secretly tracking you? Not really, but this iOS feature may make it feel that way.

The case for cybersecurity: Why successful businesses are built on protection

Company leaders need to recognize the gravity of cyber risk, turn awareness into action, and put security front and center

Manufacturing under fire: Strengthening cyber-defenses amid surging threats

Manufacturers operate in one of the most unforgiving threat environments and face a unique set of pressures that make attacks particularly damaging

New spyware campaigns target privacy-conscious Android users in the UAE

ESET researchers have discovered campaigns distributing spyware disguised as Android Signal and ToTok apps, targeting users in the United Arab Emirates

DeceptiveDevelopment: From primitive crypto theft to sophisticated AI-based deception

Malware operators collaborate with covert North Korean IT workers, posing a threat to both headhunters and job seekers

Gamaredon X Turla collab

Notorious APT group Turla collaborates with Gamaredon, both FSB-associated groups, to compromise high‑profile targets in Ukraine

Small businesses, big targets: Protecting your business against ransomware

Long known to be a sweet spot for cybercriminals, small businesses are more likely to be victimized by ransomware than large enterprises

Introducing HybridPetya: Petya/NotPetya copycat with UEFI Secure Boot bypass

UEFI copycat of Petya/NotPetya exploiting CVE-2024-7344 discovered on VirusTotal

Are cybercriminals hacking your systems – or just logging in?

As bad actors often simply waltz through companies’ digital front doors with a key, here’s how to keep your own door locked tight

Preventing business disruption and building cyber-resilience with MDR

Given the serious financial and reputational risks of incidents that grind business to a halt, organizations need to prioritize a prevention-first cybersecurity strategy

Under lock and key: Safeguarding business data with encryption

As the attack surface expands and the threat landscape grows more complex, it’s time to consider whether your data protection strategy is fit for purpose

GhostRedirector poisons Windows servers: Backdoors with a side of Potatoes

ESET researchers have identified a new threat actor targeting Windows servers with a passive C++ backdoor and a malicious IIS module that manipulates Google search results

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

The need for speed: Why organizations are turning to rapid, trustworthy MDR

How top-tier managed detection and response (MDR) can help organizations stay ahead of increasingly agile and determined adversaries

Investors beware: AI-powered financial scams swamp social media

Can you tell the difference between legitimate marketing and deepfake scam ads? It’s not always as easy as you may think.

Supply-chain dependencies: Check your resilience blind spot

Does your business truly understand its dependencies, and how to mitigate the risks posed by an attack on them?

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

Black Hat USA 2025: Is a high cyber insurance premium about your risk, or your insurer’s?

A sky-high premium may not always reflect your company’s security posture

Android adware: What is it, and how do I get it off my device?

Is your phone suddenly flooded with aggressive ads, slowing down performance or leading to unusual app behavior? Here’s what to do.

Black Hat USA 2025: Policy compliance and the myth of the silver bullet

Who’s to blame when the AI tool managing a company’s compliance status gets it wrong?

Black Hat USA 2025: Does successful cybersecurity today increase cyber-risk tomorrow?

Success in cybersecurity is when nothing happens, plus other standout themes from two of the event’s keynotes

ESET Threat Report H1 2025: ClickFix, infostealer disruptions, and ransomware deathmatch

Threat actors are embracing ClickFix, ransomware gangs are turning on each other – toppling even the leaders – and law enforcement is disrupting one infostealer after another

Why the tech industry needs to stand firm on preserving end-to-end encryption

Restricting end-to-end encryption on a single-country basis would not only be absurdly difficult to enforce, but it would also fail to deter criminal activity

The hidden risks of browser extensions – and how to stay safe

Not all browser add-ons are handy helpers – some may contain far more than you have bargained for

ToolShell: An all-you-can-eat buffet for threat actors

ESET Research has been monitoring attacks involving the recently discovered ToolShell zero-day vulnerabilities

Rogue CAPTCHAs: Look out for phony verification pages spreading malware

Before rushing to prove that you're not a robot, be wary of deceptive human verification pages as an increasingly popular vector for delivering malware

Unmasking AsyncRAT: Navigating the labyrinth of forks

ESET researchers map out the labyrinthine relationships among the vast hierarchy of AsyncRAT variants

Task scams: Why you should never pay to get paid

Some schemes might sound unbelievable, but they’re easier to fall for than you think. Here’s how to avoid getting played by gamified job scams.

How government cyber cuts will affect you and your business

Deep cuts in cybersecurity spending risk creating ripple effects that will put many organizations at a higher risk of falling victim to cyberattacks

Gamaredon in 2024: Cranking out spearphishing campaigns against Ukraine with an evolved toolset

ESET Research analyzes Gamaredon’s updated cyberespionage toolset, new stealth-focused techniques, and aggressive spearphishing operations observed throughout 2024

ESET APT Activity Report Q4 2024–Q1 2025: Malware sharing, wipers and exploits

ESET experts discuss Sandworm’s new data wiper, relentless campaigns by UnsolicitedBooker, attribution challenges amid tool-sharing, and other key findings from the latest APT Activity Report

ESET Threat Report H1 2025

A view of the H1 2025 threat landscape as seen by ESET telemetry and from the perspective of ESET threat detection and research experts

BladedFeline: Whispering in the dark

ESET researchers analyzed a cyberespionage campaign conducted by BladedFeline, an Iran-aligned APT group with likely ties to OilRig

Don’t let dormant accounts become a doorway for cybercriminals

Do you have online accounts you haven't used in years? If so, a bit of digital spring cleaning might be in order.

Word to the wise: Beware of fake Docusign emails

Cybercriminals impersonate the trusted e-signature brand and send fake Docusign notifications to trick people into giving away their personal or corporate data

Danabot: Analyzing a fallen empire

ESET Research shares its findings on the workings of Danabot, an infostealer recently disrupted in a multinational law enforcement operation

ESET takes part in global operation to disrupt Lumma Stealer

Our intense monitoring of tens of thousands of malicious samples helped this global disruption operation

ESET APT Activity Report Q4 2024–Q1 2025

An overview of the activities of selected APT groups investigated and analyzed by ESET Research in Q4 2024 and Q1 2025

Operation RoundPress

ESET researchers uncover a Russia-aligned espionage operation targeting webmail servers via XSS vulnerabilities

Catching a phish with many faces

Here’s a brief dive into the murky waters of shape-shifting attacks that leverage dedicated phishing kits to auto-generate customized login pages on the fly