Arkanix Stealer: a C++ & Python infostealer

Kaspersky researchers analyze a C++ and Python stealer dubbed "Arkanix Stealer", which was active for several months, targeted wide range of data, was distributed as MaaS and offered referral program to its partners.

Introduction In October 2025, we discovered a series of forum posts advertising a previously unknown stealer, dubbed “Arkanix Stealer” by its authors. It operated under a MaaS (malware-as-a-service) model, providing users not only with the implant but also with access to a control panel featuring configurable payloads and statistics. The set of implants included a publicly available browser post-exploitation tool known as ChromElevator, which was delivered by a native C++ version of the stealer. This version featured a wide range of capabilities, from collecting system information to stealing cryptocurrency wallet data.

Alongside that, we have also discovered Python implementation of the stealer capable of dynamically modifying its configuration. The Python version was often packed, thus giving the adversary multiple methods for distributing their malware. It is also worth noting that Arkanix was rather a one-shot malicious campaign: at the time of writing this article, the affiliate program appears to be already taken down. Kaspersky products detect this threat as Trojan-PSW. Win64. Coins. * , HEUR:Trojan-PSW. Multi. Disco. gen , Trojan. Python. Agent. * .

Technical details Background In October 2025, a series of posts was discovered on various dark web forums, advertising a stealer referred to by its author as “Arkanix Stealer”. These posts detail the features of the stealer and include a link to a Discord server, which serves as the primary communication channel between the author and the users of the stealer. Example of an Arkanix Stealer advertisement Upon further research utilizing public resources, we identified a set of implants associated with this stealer. Initial infection or spreading The initial infection vector remains unknown.

However, based on some of the file names (such as steam_account_checker_pro_v1. py , discord_nitro_checker. py , and TikTokAccountBotter.