Hackers Use Fake Microsoft Entra Passkey Enrollment to Gain Microsoft 365 Access

A threat actor has been targeting organizations spanning multiple sectors with voice-based fake security requests that prompt Microsoft 365 users to enroll a new Entra passkey with an aim to carry out data extortion attacks. The threat actor, tracked by Okta under the moniker O-UNC-066 , has...

MFA Prompt Bombing: Why Your Second Factor Isn't Saving You

Multi-factor authentication MFA was supposed to close a critical gap in identity security. It meant that, even if an attacker possessed the account credentials, they couldn't log in without the second factor. While that logic was sound, attackers have now figured out that they don't need to steal...

Help on the line: How a Microsoft Teams support call led to compromise

In our eighth Cyberattack Series report, Microsoft Incident Response—the Detection and Response Team DART—investigates a recent identity-first, human-operated intrusion that relied less on exploiting software vulnerabilities and more on deception and legitimate tools. After a customer reached out...

Talking like a Phisher: LLM-Based Attacks on Voice Phishing Classifiers

Voice phishing vishing remains a persistent threat in cybersecurity, exploiting human trust through persuasive speech. While machine learning ML-based classifiers have shown promise in detecting malicious call transcripts, they remain vulnerable to adversarial manipulations that preserve semantic...

FakeCalls Vishing Malware Targets South Korean Users via Popular Financial Apps

An Android voice phishing aka vishing malware campaign known as FakeCalls has reared its head once again to target South Korean users under the guise of over 20 popular financial apps. "FakeCalls malware possesses the functionality of a Swiss army knife, able not only to conduct its primary aim b...

A week in security (November 23 – November 29)

Last week on Malwarebytes Labs, we talked with Chris Boyd about charities that track you online. We also looked back at Zoom, and wondered whether its any safer months after its first vulnerability was reported. We talked about how Apples security is hampering the detection of potentially unwante...

GoDaddy Employees Tricked into Compromising Cryptocurrency Sites

A recent social-engineering “vishing” attack on domain registrar GoDaddy temporarily handed over control of cryptocurrency service sites NiceHash and Liquid to fraudsters, exposing personal information of users. Vishing is a phishing scam that uses voice interactions over the phone to gain trust...