The past few years have seen a significant increase in the number of Rust developers. Rust is a programming language focused on performance and reliability.
However, for an attacker, its complicated assembly code is a significant merit. In May 2024, FortiGuard Labs observed a Rust-based stealer. In addition to its intricate code, the stealer is distributed using a variety of strategies and has a flexible way of choosing its target. Because of this ambiguity, we decided to call it Fickle Stealer. This article summarizes the details of this campaign, roughly dividing the attack chain into three stages: Delivery, Preparatory Work, and Packer and Stealer Payload.
Read more…
Source: Fortinet
Related:
- .NET Hooking – Harmonizing Managed Territory
January 8, 2024
For a malware researcher, analyst, or reverse engineer, the ability to alter the functionality of certain parts of code is a crucial step, often necessary to reach a meaningful result during the analysis process. This kind of code instrumentation is usually reached by debugging, DBI (Dynamic Binary Instrumentation), or a simple hooking framework. Managing the code ...
- Tackling Anti-Analysis Techniques of GuLoader and RedLine Stealer
January 5, 2024
Malware, like many complex software systems, relies on the concept of software configuration. Configurations establish guidelines for malware behavior and they are a common feature among the various malware families Unit 42 examine. The configuration data embedded within malware can offer invaluable insights into the intentions of cybercriminals. However, due to its significance, malware authors deliberately ...
- Bandook – A Persistent Threat That Keeps Evolving
December 21, 2023
Bandook malware is a remote access trojan that has been continuously developed since it was first detected in 2007. It has been used in various campaigns by different threat actors over the years. FortiGuard Labs identified a new Bandook variant being distributed via a PDF file this past October. This PDF file contains a shortened URL ...
- Rhadamanthys v0.5.0 – A Deep Dive Into The Stealer’s Components
December 14, 2023
Rhadamanthys is an information stealer with a diverse set of modules and an interesting multilayered design. In their last article on Rhadamanthys, Check Point researchers focused on the custom executable formats used by this malware and their similarity to a different family, Hidden Bee, which is most likely its predecessor. In this article they do a ...
- Analyzing AsyncRAT’s code injection into aspnet_compiler.exe across multiple incident response cases
December 11, 2023
During their recent investigations, the Trend Micro Managed XDR (MxDR) team handled various cases involving AsyncRAT, a Remote Access Tool (RAT) with multiple capabilities, such as keylogging and remote desktop control, that make it a substantial threat to victims. This blog entry delves into MxDR’s unraveling of the AsyncRAT infection chain across multiple cases, shedding light ...
- MrAnon Stealer Spreads via Email with Fake Hotel Booking PDF
December 7, 2023
FortiGuard Labs recently identified an email phishing campaign using deceptive booking information to entice victims into clicking on a malicious PDF file. The PDF downloads a .NET executable file created with PowerGUI and then runs a PowerShell script to fetch the final malware, known as MrAnon Stealer. This malware is a Python-based information stealer compressed with ...