Immortal information stealer

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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 sold on the dark web with different build-based subscriptions. This blog provides an analysis of the data Immortal steals ... Read More

Sieren: A new DoS bot

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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 temporarily or indefinitely, to its intended users. In this analysis, we'll describe Sieren's functionality and communication, its 10 ... Read More