Zscaler Cloud Security Logo
Company > Blog

News and views from the leading voice in secure digital transformation

More From This Author

Profile picture for user RDodia@zscaler.com

Rajdeepsinh Dodia

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...
ransomware-attack-notification
Ransomware
2 Min read

ThreatLabZ Ransomware Review: The Advent of Double Extortion

The recent ransomware attack on the Colonial Pipeline abruptly halted operations on the largest refined products pipeline in the United States, impacting fuel availability across the eastern half of the country. In this ...
Resurgence of the QakBot Stealer from Newly Registered Domains
Insights and Research
7 Min read

Resurgence of the QakBot Stealer from Newly Registered Domains

The Zscaler ThreatLabZ team is constantly on the lookout for trending and evolving techniques used by malware authors to infiltrate victims' machines, steal information, and carry out other malicious activities. Recently...
FTCODE Ransomware — New Version Includes Stealing Capabilities
Ransomware
6 Min read

FTCODE Ransomware — New Version Includes Stealing Capabilities

Recently, the Zscaler ThreatLabZ team came across PowerShell-based ransomware called “FTCODE,” which targets Italian-language users. An earlier version of FTCODE ransomware was being downloaded using a document file that...
Examining the Ryuk Ransomware
Ransomware
4 Min read

Examining the Ryuk Ransomware

Ryuk ransomware had a disturbingly successful debut, being used to hit at least three organizations in its first two months of activity for more than $640,000 in ransom. Several attacks followed, where the attackers dema...
Saefko: A new multi-layered RAT
Insights and Research
11 Min read

Saefko: A new multi-layered RAT

Recently, the Zscaler ThreatLabZ team came across a new remote-access trojan (RAT) for sale on the dark web. The RAT, called Saefko, is written in .NET and has multiple functionalities. This blog provides a detailed anal...
Immortal information stealer
Insights and Research
4 Min read

Immortal information stealer

Recently, the Zscaler ThreatLabZ team came across new information-stealer malware called Immortal, which is written in .NET and designed to steal sensitive information from an infected machine. The Immortal stealer is so...
Sieren: A new DoS bot
Insights and Research
4 Min read

Sieren: A new DoS bot

Zscaler ThreatLabZ recently discovered a new DoS family bot named Sieren. A denial-of-service (DoS) attack is a cyber-attack in which cybercriminals disrupt the service of a host connected to the internet, either tempora...
Cryptominers and stealers – malware edition
Insights and Research
10 Min read

Cryptominers and stealers – malware edition

It all started in 2008 with a paper on the first decentralized digital currency, Bitcoin, created by an unknown person or persons referred to as Satoshi Nakamoto. Bitcoin is a peer-to-peer currency based on cryptography ...

Related Articles

Explore More Topics