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Brett Stone-Gross

Director of Threat Intelligence
Cyber security
Insights and Research
11 Min read

Squirrelwaffle: New Loader Delivering Cobalt Strike

Zscaler ThreatLabz has been following an emerging new malware loader known as Squirrelwaffle that is being used to deliver Cobalt Strike. In this blog, we will be analyzing the complete attack chain for this new malware ...
Ransomware hacker
Ransomware
3 Min read

DoppelPaymer Continues to Cause Grief Through Rebranding

In early May 2021, DoppelPaymer ransomware activity dropped significantly. Although the DoppelPaymer leak site still remains online, there has not been a new victim post since May 6, 2021. In addition, no victim posts ha...
REvil ransomware attack
Insights and Research
8 Min read

Kaseya Supply Chain Ransomware Attack - Technical Analysis of the REvil Payload

On July 2, 2021, Kaseya, an IT Management software firm, disclosed a security incident impacting their on-premises version of Kaseya's Virtual System Administrator (VSA) software. Kaseya VSA is a cloud-based Managed Serv...
Ares malware
Insights and Research
17 Min read

Ares Malware: The Grandson of the Kronos Banking Trojan

Kronos is a banking trojan that first emerged in 2014 and marketed in underground forums as a crimeware kit to conduct credit card, identity theft, and wire fraud. In September 2018, a new Kronos variant named Osiris int...
Botnets
Insights and Research
32 Min read

DreamBus Botnet – Technical Analysis

Zscaler’s ThreatLabZ research team recently analyzed a Linux-based malware family that we have dubbed the DreamBus Botnet. The malware is a variant of SystemdMiner, which consists of a series of Executable and Linkable F...

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