- 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 ...
- Three New Malicious PyPI Packages Deploy CoinMiner on Linux Devices
January 3, 2024
On December 5th, 2023, FortiGuard’s AI-driven OSS malware detection system identified three intriguing PyPI (Python Package Index) packages. These packages, upon initial use, deploy a CoinMiner executable on Linux devices. Leveraging our historical malware database, Fortinet researchers noted that the indicators of compromise (IoCs) for these packages bear a resemblance to the “culturestreak” PyPI package discovered ...
- Financially motivated threat actors misusing App Installer
December 28, 2023
Since mid-November 2023, Microsoft Threat Intelligence has observed threat actors, including financially motivated actors like Storm-0569, Storm-1113, Sangria Tempest, and Storm-1674, utilizing the ms-appinstaller URI scheme (App Installer) to distribute malware. In addition to ensuring that customers are protected from observed attacker activity, Microsoft investigated the use of App Installer in these attacks. In response to ...
- Israel’s Cyber Directorate warns of phishing attack by Iran-based hacking squad
December 26, 2023
Israel’s National Cyber Directorate issued a statement Tuesday warning of a phishing attack by Iranian hackers. Posing as American network security conglomerate F5, Iranian hackers sent an email to IT officials in multiple Israeli companies with instructions to download what seems like an update, but is actually malware, said the directorate. Working with an unnamed commercial ...
- 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 ...
- Threat Actors Exploit CVE-2017-11882 To Deliver Agent Tesla
December 19, 2023
First discovered in 2014, Agent Tesla is an advanced keylogger with features like clipboard logging, screen keylogging, screen capturing, and extracting stored passwords from different web browsers. Recently, Zscaler ThreatLabz detected a threat campaign where threat actors leverage CVE-2017-11882 XLAM to spread Agent Tesla to users on vulnerable versions of Microsoft Office. The CVE-2017-11882 vulnerability is ...
- 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 ...
- New macOS Trojan-Proxy piggybacking on cracked software
December 6, 2023
Illegally distributed software historically has served as a way to sneak malware onto victims’ devices. Kaspersky researchers have recently discovered several cracked applications distributed by unauthorized websites and loaded with a Trojan-Proxy. Attackers can use this type of malware to gain money by building a proxy server network or to perform criminal acts on behalf of ...