Remote Access Trojan

AsyncRAT

First seen: 2019-01 • Status: active

Currently Active Threat

AsyncRAT started as an open-source project on GitHub but is now one of the most common hacking tools. Because anyone can download and modify the code, there are countless versions floating around. Once it infects your computer, hackers can control it remotely, watch your screen, steal your files, and even use your webcam.

Overview

AsyncRAT is an open-source remote access trojan originally released on GitHub as a "legitimate remote administration tool." Its source code availability has made it extremely popular among threat actors who modify and distribute it widely. AsyncRAT provides full remote control over infected systems.

Also Known As

Async RAT, AsyncRemoteAccessTrojan

How It Spreads

  • • Phishing emails with malicious attachments
  • • Pirated software and game cracks
  • • Fake browser or Flash updates
  • • Discord and social media distribution
  • • Exploit kits and drive-by downloads

What It Does

  • • Provides full remote desktop access
  • • Records keystrokes and captures passwords
  • • Accesses webcam and microphone
  • • Downloads and executes additional payloads
  • • Steals browser data and credentials
  • • Manages files and processes on infected system

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Target Platforms

Windows 7, Windows 10, Windows 11

Detection Tips

  • • Monitor for AsyncClient.exe or AsyncRAT-related process names
  • • Alert on outbound connections to dynamic DNS services
  • • Detect unusual .NET processes with network activity
  • • Watch for keylogger and screen capture behavior
  • • Monitor for persistence in scheduled tasks or registry Run keys

MITRE ATT&CK Techniques

T1219, T1056.001, T1125, T1113, T1059.001

If You're Infected

  1. 1.

    Terminate AsyncRAT process and disconnect from network

  2. 2.

    Change all passwords - assume complete compromise

  3. 3.

    Remove persistence mechanisms (registry, scheduled tasks)

  4. 4.

    Check for additional malware (AsyncRAT often brings more)

  5. 5.

    Cover webcam until system is clean (physical cover)

  6. 6.

    Consider full system reinstall for complete remediation

Related Malware

Quasarrat, Remcos, Njrat

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