Analyzing a Multi-Stage AsyncRAT Campaign via Managed Detection and Response


AsyncRAT has emerged as a notable Remote Access Trojan (RAT) used by threat actors for its robust capabilities and ease of deployment. It gained favor for its extensive feature set, which includes keylogging, screen capturing, and remote command execution capabilities.

Its modular architecture, typically implemented in Python, provides flexibility and ease of customization, making it a preferred tool of choice for cybercriminals. During Trend Micro investigation of AsyncRAT infections, we observed Python scripts playing a central role in the infection chain, automating various stages of the attack. The initial payload, a Windows Script Host (WSH) file, was designed to download and execute additional malicious scripts hosted on a WebDAV server.

Read more…
Source: Trend Micro


Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox


Related:

  • Leaks show Intellexa burning zero-days to keep Predator spyware running

    December 5, 2025

    Intellexa is a well-known commercial spyware vendor, servicing governments and large corporations. Its main product is the Predator spyware. An investigation by several independent parties describes Intellexa as one of the most notorious mercenary spyware vendors, still operating its Predator platform and hitting new targets even after being placed on US sanctions lists and being under ...

  • CVE-2025-55182 React vulnerability could soon be exploited – so patch now

    December 5, 2025

    eact is one of the most popular JavaScript libraries, which powers much of today’s internet. Researchers recently discovered a maximum-severity vulnerability. This bug could allow even the low-skilled threat actors to execute malicious code (RCE) on vulnerable instances. Earlier this week, the React team published a new security advisory detailing a pre-authentication bug in multiple versions ...

  • Cloudflare says service restored after outage that brought down sites including Zoom and LinkedIn

    December 5, 2025

    Internet infrastructure company Cloudflare on Friday said it had restored services following an outage that took place in the morning and brought down several global websites including LinkedIn, Zoom and others, the second such crash to affect the company in less than three weeks. Cloudflare said the issue had been resolved and was not due to ...

  • Sanctioned spyware maker Intellexa had direct access to government espionage victims, researchers say

    December 4, 2025

    Spyware maker Intellexa had remote access to some of its government customers’ surveillance systems, giving company staffers the ability to see the personal data of people whose phones had been hacked with its Predator spyware, according to new evidence published by Amnesty International. On Thursday, Amnesty and a coalition of media partners, including Israeli newspaper Haaretz, ...

  • International takedown of cryptocurrency fraud network laundering over EUR 700 million

    December 4, 2025

    The final actions in a sweeping international operation have successfully dismantled a large-scale cryptocurrency fraud and money laundering network that had laundered over EUR 700 million. Coordinated across multiple jurisdictions, these actions, carried out last month and earlier this week, mark the culmination of years of investigation and the effective disruption of a criminal operation ...

  • Freedom Mobile Confirms Customer Data Breach

    December 4, 2025

    Canadian telecommunications provider Freedom Mobile suffered a supply-chain attack recently, in which it lost sensitive data on a yet undisclosed number of customers. In a data breach notification letter posted on its website earlier this week, Freedom said hackers broke into an account of a subcontractor, through which they accessed personal information “of a limited number” ...