Overview

overview

8

Static

static

3

kythy.exe

windows10-2004-x64

7

kythy.exe

windows10-ltsc_2021-x64

7

kythy.exe

windows11-21h2-x64

7

kythy.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    298s
  • max time network
    225s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/07/2026, 15:19

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General

  • Target
    kythy.exe
  • Size 2.0MB
  • Sample260705-sqffcac19t
  • SHA256 eb530402b07763a24a506d0e417e2459b38a6c31c67e9ccdc168df04aa6e1782
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarepersistenceransomwarespyware

Malware Config

Signatures

  • 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
  • Executes dropped EXE 2 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • 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 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of FindShellTrayWindow 56 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 6 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\kythy.exe
    "C:\Users\Admin\AppData\Local\Temp\kythy.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Windows\SYSTEM32\at.exe
      at.exe
      2⤵
        PID:2060
      • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\AutoIt3.exe
        C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\AutoIt3.exe Custom.a3x
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:4732
        • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\AutoIt3.exe
          C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\AutoIt3.exe
          3⤵
          • Executes dropped EXE
          PID:1408
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3060
      • 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:108
    • 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:4520
    • 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:4160

    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 599B
          • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          AutoIt3.exe
          • Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\AutoIt3.exe
          • Size 1.0MB
          • SHA256 92c6531a09180fae8b2aae7384b4cea9986762f0c271b35da09b4d0e733f9f45
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Custom.a3x
          • Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Custom.a3x
          • Size 1.4MB
          • SHA256 cdc5b74ece5df8ee4ab0e4ca2e56281e679d2f8d20e209a7488b1f58751d347c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/1408-10-0x0000023F9D460000-0x0000023F9D67A000-memory.dmp
          Download

          memory/1408-11-0x0000023F9D460000-0x0000023F9D67A000-memory.dmp
          Download

          memory/4520-37-0x000001E5801E0000-0x000001E5802E0000-memory.dmp
          Download

          memory/4520-65-0x000001E594330000-0x000001E594350000-memory.dmp
          Download

          memory/4520-43-0x000001E583E50000-0x000001E583F50000-memory.dmp
          Download

          memory/4520-42-0x000001E583A30000-0x000001E583A50000-memory.dmp
          Download

          memory/4520-58-0x000001E583E10000-0x000001E583E30000-memory.dmp
          Download

          memory/4732-7-0x00007FFDC5E80000-0x00007FFDC60E3000-memory.dmp
          Download

          memory/4732-8-0x0000020DB5EB0000-0x0000020DB5EB1000-memory.dmp
          Download