General

  • Target
    AsyncClient.exe
  • Size 163KB
  • Sample260724-r7thvs1vex
  • SHA256 de0997525b3e663ff163ccf8d99b3c9b1f9f98581eb18ba153ba1cfd89d11bbd
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • Default

C2
  • 5.tcp.eu.ngrok.io:6606

  • 5.tcp.eu.ngrok.io:7707

  • 5.tcp.eu.ngrok.io:8808

  • 5.tcp.eu.ngrok.io:4444

  • 5.tcp.eu.ngrok.io:11798

Mutex
  • cyMjqnl9DJTq

Attributes
  • delay

    3

  • install

    true

  • install_file

    Async.exe

  • install_folder

    %AppData%

  • local_host

    127.0.0.1

aes.plain

Targets

    • Target
      AsyncClient.exe
    • Size 163KB
    • SHA256 de0997525b3e663ff163ccf8d99b3c9b1f9f98581eb18ba153ba1cfd89d11bbd
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Async RAT payload

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound

      Network activity triggered a Suricata alert

    • Looks for VirtualBox drivers on disk

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Disables one or more Microsoft Defender components

      Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

    • Looks for VMWare drivers on disk

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Drops desktop.ini file(s)

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks