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:
- Suspected Nation-State Threat Actor Uses New Airstalk Malware in a Supply Chain Attack
October 29, 2025
Palo Alto Unit 42 researchers have discovered a new Windows-based malware family they’ve named Airstalk, which is available in both PowerShell and .NET variants. Unit 42 assess with medium confidence that a possible nation-state threat actor used this malware in a likely supply chain attack. The researchers have created the threat activity cluster CL-STA-1009 to identify ...
- Active Water Saci Campaign Spreading Via WhatsApp Features Multi-Vector Persistence and Sophisticated C&C
October 27, 2025
Trend Research is continuously tracking the aggressive malware campaign it identified as Water Saci, which uses WhatsApp as its primary infection vector. In our previous blog, the Water Saci campaign, with its malware identified as SORVEPOTEL, automatically distributes the same malicious ZIP file to all contacts and groups associated with the victim’s compromised account for ...
- Mem3nt0 mori – The Hacking Team is back!
October 27, 2025
n March 2025, Kaspersky detected a wave of infections that occurred when users clicked on personalized phishing links sent via email. No further action was required to initiate the infection; simply visiting the malicious website using Google Chrome or another Chromium-based web browser was enough. The malicious links were personalized and extremely short-lived to avoid detection. ...
- Unmasking MuddyWater’s New Malware Toolkit Driving International Espionage
October 22, 2025
Group-IB Threat Intelligence uncovered a sophisticated phishing campaign orchestrated by the Advanced Persistent Threat (APT) MuddyWater, targeting international organizations worldwide to gather foreign intelligence. MuddyWater accessed the compromised mailbox through NordVPN(a legitimate service abused by the threat actor), and used it to send phishing emails that appeared to be authentic correspondence. By exploiting the trust and ...
- Fast, Broad, and Elusive: How Vidar Stealer 2.0 Upgrades Infostealer Capabilities
October 21, 2025
On October 6, 2025, the developer known as “Loadbaks” announced the release of Vidar Stealer v2.0 on underground forums. This new version features a complete transition from C++ to a pure C implementation, allegedly enhancing performance and efficiency. Its release coincides with a decline in activity surrounding the Lumma Stealer, suggesting cybercriminals under its operation ...
- Maverick: a new banking Trojan abusing WhatsApp in a mass-scale distribution
October 15, 2025
A malware campaign was recently detected in Brazil, distributing a malicious LNK file using WhatsApp. It targets mainly Brazilians and uses Portuguese-named URLs. To evade detection, the command-and-control (C2) server verifies each download to ensure it originates from the malware itself. The whole infection chain is complex and fully fileless, and by the end, it will ...