General

  • Target
    Tele_VietNamReport.exe
  • Size 112KB
  • Sample261107-m7lqssef79
  • SHA256 2015a710d1f2c5f33c9e628ea23cbc0ac862c00a9fded0f7c69956d60efb468f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • au88 backdoor

Mutex
  • KSOYTAFik3sE

Attributes
  • delay

    3

  • install

    true

  • install_file

    App.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://register.mybet88.gg/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://32win23.pro/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://b52club.bio/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://bigslot855.vip/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://xx8.loans/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://8kbet.ist/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://nmk.yosusai.in/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://e390a.com/load.ps1

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://m.asianslots.co/load.ps1

Targets

    • Target
      Tele_VietNamReport.exe
    • Size 112KB
    • SHA256 2015a710d1f2c5f33c9e628ea23cbc0ac862c00a9fded0f7c69956d60efb468f
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Async RAT payload

    • Family: AsyncRat

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

    • Modifies WinLogon for persistence

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks computer location settings

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

    • Executes dropped EXE

    • Registers new Windows logon scripts automatically executed at logon.

    • Adds Run key to start application

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

MITRE ATT&CK Enterprise v16

Tasks