04
Nov
2025

Beware of threats lurking in booby-trapped PDF files

Looks can be deceiving, so much so that the familiar icon could mask malware designed to steal your data and…

Weaponized Putty and Teams Ads Deliver Malware Allowing Hackers to Access Devices and Networks
04
Nov
2025

Weaponized Putty and Teams Ads Deliver Malware Allowing Hackers to Access Devices and Networks

An ongoing malicious advertising campaign is weaponizing legitimate software downloads to deploy OysterLoader malware, previously identified as Broomstick and CleanUpLoader….

Microsoft’s WSUS Patch Causes Hotpatching Failures on Windows Server 2025
04
Nov
2025

Microsoft’s WSUS Patch Causes Hotpatching Failures on Windows Server 2025

Microsoft has acknowledged a critical issue affecting Windows Server 2025 systems enrolled in the Hotpatch program. A recent Windows Server…

How nations build and defend their cyberspace capabilities
04
Nov
2025

How nations build and defend their cyberspace capabilities

In this Help Net Security interview, Dr. Bernhards Blumbergs, Lead Cyber Security Expert at CERT.LV, discusses how cyberspace has become…

Microsoft Detects "SesameOp" Backdoor Using OpenAI's API as a Stealth Command Channel
04
Nov
2025

Microsoft Detects “SesameOp” Backdoor Using OpenAI’s API as a Stealth Command Channel

Nov 04, 2025Ravie LakshmananArtificial Intelligence / Malware Microsoft has disclosed details of a novel backdoor dubbed SesameOp that uses OpenAI…

Why successful businesses are built on protection
04
Nov
2025

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…

Malicious PuTTY Ads Deliver OysterLoader, Allowing Attackers Full Device and Network Access
04
Nov
2025

Malicious PuTTY Ads Deliver OysterLoader, Allowing Attackers Full Device and Network Access

The Rhysida ransomware gang has been running a sophisticated malvertising campaign that delivers OysterLoader malware through deceptive search engine advertisements,…

Cybercriminals have built a business on YouTube’s blind spots
04
Nov
2025

Cybercriminals have built a business on YouTube’s blind spots

The days when YouTube was just a place for funny clips and music videos are behind us. With 2.53 billion…

04
Nov
2025

Microsoft Detects “SesameOp” Backdoor Using OpenAI’s API as a Stealth Command Channel

Nov 04, 2025Ravie LakshmananArtificial Intelligence / Malware Microsoft has disclosed details of a novel backdoor dubbed SesameOp that uses OpenAI…

Passwords alone are not enough
04
Nov
2025

Passwords alone are not enough

Never rely on just a password, however strong it may be. Multi-factor authentication is essential for anyone who wants to…

Using the OpenAI Assistants API for Covert C2 Communication
04
Nov
2025

Using the OpenAI Assistants API for Covert C2 Communication

Microsoft’s Detection and Response Team has exposed a sophisticated backdoor malware that exploits the OpenAI Assistants API as an unconventional…

Deepfakes, fraud, and the fight for trust online
04
Nov
2025

Deepfakes, fraud, and the fight for trust online

In this Help Net Security video, Michael Engle, Chief Strategy Officer at 1Kosmos, explains how deepfakes are changing online identity…