The Gentlemen RaaS: rapid growth and a new ransomware variant
Introduction This year saw the emergence of The Gentlemen, a prominent example of a group operating under the ransomware-as-a-service (RaaS)
Computer Security
Inside Gentlemen’s EDR killer framework
ESET researchers analyzed the robust EDR-killing toolset of the ransomware-as-a-service gang Gentlemen. Since the beginning of 2026, Gentlemen has emerged
Hacker hijacks Brazil’s national alert system, sending “misanthropy” to millions of phones
Picture the scene. You’re in bed fast asleep, when suddenly your phone erupts with a blaring emergency siren. . You
July 2026 Patch Tuesday forecast: Is CVE tracking still practical?
I was off by a month in my forecast of record-setting CVE releases from Microsoft. In June, we saw the
Lawmakers Demand Answers as CISA Tries to Contain Data Leak – Krebs on Security
Lawmakers in both houses of Congress are demanding answers from the U.S. Cybersecurity & Infrastructure Security Agency (CISA) after KrebsOnSecurity
Armenian national pleads guilty to Ryuk ransomware attacks
An Armenian national who was extradited from Ukraine to the United States last year pleaded guilty to participating in a
Winning 54% of the time
Welcome to this week’s Threat Source newsletter. There’s a fairly cliché phrase in cybersecurity that I’m sure our audience is
“Comment stuffing” in an HTML phishing attachment as a mechanism for evading AI-based detection?
” tag and was made up of a single HTML comment containing a little over 430 thousand copies of the
How the ToddyCat APT group gains access to Gmail accounts
Introduction We continue to share details on the malicious techniques and toolsets used by the ToddyCat APT group. In the
ESET takes part in Operation Endgame to disrupt Amadey and Stealc
A year ago, ESET Research was part of two major operations that disrupted some of the leading cybercriminal operations at