What is fileless malware?

Unlike traditional malware, which relies on a file being written to a disk, fileless malware is intended to be memory resident only, ideally leaving no trace after its execution. The malicious payload exists in the computer’s memory, which means nothing is ever written directly to the hard drive...

APT Attack Injects Malware into Windows Error Reporting

A campaign that injects malware into the Windows Error Reporting WER service to evade detection is potentially the work of a Vietnamese APT group, researchers said. The attack, discovered on Sept. 17 by researchers at Malwarebytes Threat Intelligence Team, lures its victims with a phishing campai...

Release the Kraken: Fileless injection into Windows Error Reporting service

This blog post was authored by Hossein Jazi and Jérôme Segura. On September 17th, we discovered a new attack called Kraken that injected its payload into the Windows Error Reporting WER service as a defense evasion mechanism. That reporting service, WerFault.exe, is usually invoked when an error...