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:
- Lockbit leak, research opportunities on tools leaked from TAs
August 25, 2023
Lockbit is one of the most prevalent ransomware strains. It comes with an affiliate ransomware-as-a-service (RaaS) program offering up to 80% of the ransom demand to participants, and includes a bug bounty program for those who detect and report vulnerabilities that allow files to be decrypted without paying the ransom. According to the Lockbit owners, the ...
- JanelaRAT: Repurposed BX Rat Variant Targeting LATAM FinTech
August 10, 2023
In June of 2023, researchers at Zscaler ThreatLabz discovered a threat actor targeting FinTech users in the LATAM region. JanelaRAT involves several tactics, techniques, and procedures (TTPs) such as DLL side-loading, dynamic C2 infrastructure, and a multi-stage attack. The final malware involved in this campaign is a heavily modified variant of BX RAT. Because of this, ...
- An overview of the new Rhysida ransomware targeting the Healthcare sector
August 9, 2023
On August 4, 2023, the HHS’ Health Sector Cybersecurity Coordination Center (HC3) released a security alert about a relatively new ransomware called Rhysida (detected as Ransom.PS1.RHYSIDA.SM), which has been active since May 2023. In this blog entry, Trend Micro reaseachers will provide details on Rhysida, including its targets and what they know about its infection ...
- Attackers Distribute Malware via Freeze.rs And SYK Crypter
August 9, 2023
FortiGuard Labs recently detected a new injector written in Rust—one of the fastest-growing programming languages—to inject shellcode and introduce XWorm into a victim’s environment. While Rust is relatively uncommon in malware development, several campaigns have adopted this language since 2019, including Buer loader, Hive, and RansomExx. FortiGuard Labs analysis also revealed a significant increase in injector ...
- What’s happening in the world of crimeware: Emotet, DarkGate and LokiBot
August 3, 2023
The malware landscape keeps evolving. New families are born, while others disappear. Some families are short-lived, while others remain active for quite a long time. In order to follow this evolution, Kaspersky researchers rely both on samples that they detect and their monitoring efforts, which cover botnets and underground forums. While doing so, the researchers found ...
- Out of the Sandbox: WikiLoader Digs Sophisticated Evasion
July 31, 2023
Proofpoint researchers identified a new malware we call WikiLoader. It was first identified in December 2022 being delivered by TA544, an actor that typically uses Ursnif malware to target Italian organizations. Proofpoint observed multiple subsequent campaigns, the majority of which targeted Italian organizations. WikiLoader is a sophisticated downloader with the objective of installing a second malware ...