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:

  • Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor

    June 2, 2026

    Palo Alto Unit 42 are tracking an increasingly widespread malvertising campaign targeting macOS. This campaign appears to be the next stage of a previous campaign known as JSCoreRunner, which was first identified in August 2025. In recent months, the financially-motivated attackers behind these campaigns transitioned from delivering standard adware, to delivering adware with full backdoor ...

  • Russian spy agency says foreign spies turned officials’ smartphones into surveillance devices

    June 2, 2026

    Russia’s domestic spy agency says it has uncovered a sprawling foreign espionage operation that allegedly turned the smartphones of senior Russian officials into pocket-sized surveillance devices, though it has so far offered little in the way of evidence. In a statement Tuesday, the Federal Security Service (FSB) claimed foreign intelligence agencies implanted malware on the mobile devices ...

  • Fake virus alerts are invading mobile games

    June 2, 2026

    Sometimes it happens. You’re happily playing a game on your phone or laptop when suddenly alarms pop up out of nowhere: “Your device is infected!” “Your iCloud is full!” “Your account is restricted for watching porn!” Some games can be played for free if you agree to watch ads, and in others you can get extra lives, perks, or ...

  • Palo Alto VPN bug graduates from advisory to active exploitation

    June 1, 2026

    Palo Alto customers are being been told to patch yet another internet-facing security flaw after researchers caught attackers bypassing GlobalProtect authentication and gaining unauthorized VPN access. The flaw, tracked as CVE-2026-0257, affects PAN-OS deployments using GlobalProtect authentication override cookies under specific configurations. Read more… Source:  The Register Sign up for the Cyber Security Review Newsletter The latest cyber security news and ...

  • Grand Theft Auto V cheat service gets hacked, exposing thousands of gamers

    June 1, 2026

    Atlas Menu, a cheat service for popular online video game Grand Theft Auto V, has been hacked, according to data breach notification website Have I Been Pwned. The stolen data included users’ email addresses, usernames, scrambled passwords, IP addresses, and support tickets, according to Have I Been Pwned, which said almost 64,000 accounts were part of the ...

  • CVE-2026-0826: How an Old Bug Can Feed AI-Powered Impersonation

    June 1, 2026

    Rapid7 Senior Principal Security Researcher Stephen Fewer discovered CVE-2026-0826, a critical unauthenticated stack-based buffer overflow vulnerability affecting multiple HP Poly VoIP devices. If you’ve been around vulnerability research long enough, the bug class here is going to feel very familiar. And interestingly enough, that’s exactly why it deserves attention. These older exploitation primitives never really went ...