Overview

overview

10

Static

static

10

AsyncClient.exe

windows10-2004-x64

10

AsyncClient.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    900s
  • max time network
    898s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    13/08/2026, 03:21

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General

  • Target
    AsyncClient.exe
  • Size 45KB
  • Sample260813-dwl3rayye1
  • SHA256 17e6bbad19cb564b48cde4a36acba87485c77017323c7f11d12e5518a107f7d6
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwaredefaultdiscoveryasyncratpersistenceransomwareratspywaresuricata

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • lildarkweb.ddns.net:8888

Mutex

  • uwA02qBVw6AA

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

    ratasyncrat
  • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound 2 IoCs

    Network activity triggered a Suricata alert

    suricataasyncrat
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

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

    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

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

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

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

    discovery
  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 59 IoCs
  • Suspicious use of FindShellTrayWindow 52 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:3884
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4272
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1088
      • C:\Windows\explorer.exe
        explorer.exe /LOADSAVEDWINDOWS
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Enumerates connected drives
        • Checks SCSI registry key(s)
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:792
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:3420
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1644
    • C:\Windows\System32\SecurityHealthHost.exe
      \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
      1⤵
        PID:1400

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            prep_Activatable Class_Hermes_perf.cache
            • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
            • Size 595B
            • SHA256 d4e60617c2afab8263febabe7f14f18595715078d71307a8cefe0707dae76dee
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            memory/3420-62-0x0000016F84390000-0x0000016F843B0000-memory.dmp
            Download

            memory/3420-17-0x0000016F801E0000-0x0000016F802E0000-memory.dmp
            Download

            memory/3420-23-0x0000016F83A30000-0x0000016F83A50000-memory.dmp
            Download

            memory/3420-24-0x0000016F83E70000-0x0000016F83F70000-memory.dmp
            Download

            memory/3420-48-0x0000016F83E10000-0x0000016F83E30000-memory.dmp
            Download

            memory/3884-6-0x0000000006810000-0x0000000006DCA000-memory.dmp
            Download

            memory/3884-9-0x00000000749E0000-0x000000007519C000-memory.dmp
            Download

            memory/3884-10-0x0000000007450000-0x00000000074C6000-memory.dmp
            Download

            memory/3884-11-0x00000000074D0000-0x0000000007562000-memory.dmp
            Download

            memory/3884-12-0x0000000007430000-0x000000000744E000-memory.dmp
            Download

            memory/3884-8-0x00000000749F2000-0x00000000749F3000-memory.dmp
            Download

            memory/3884-7-0x00000000062C0000-0x0000000006326000-memory.dmp
            Download

            memory/3884-0-0x00000000749F2000-0x00000000749F3000-memory.dmp
            Download

            memory/3884-5-0x0000000005E50000-0x0000000005EEC000-memory.dmp
            Download

            memory/3884-2-0x00000000749E0000-0x000000007519C000-memory.dmp
            Download

            memory/3884-1-0x0000000000F90000-0x0000000000FA2000-memory.dmp
            Download