Analysis

  • max time kernel
    73s
  • max time network
    159s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/07/2026, 12:17

General

  • Target
    UpdateScheduler.exe
  • Size 252KB
  • Sample260704-pgdnlsa15m
  • SHA256 b25346ac48099606de4bd7f72a4e76876587aadf5734eaa83b81b9e79437acab
  • MD5 SHA1 SHA512 SSDEEP TLSH

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.

  • 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 NtSetInformationThreadHideFromDebugger 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
  • Modifies registry class 29 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 26 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\UpdateScheduler.exe
    "C:\Users\Admin\AppData\Local\Temp\UpdateScheduler.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    PID:4252
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5432
    • 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:1800
  • 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:4920
  • 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:6016

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        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

        memory/4252-12-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-10-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-0-0x00007FFE2F08F000-0x00007FFE2F090000-memory.dmp

        memory/4252-4-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-6-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-5-0x000001879A880000-0x000001879A8B0000-memory.dmp

        memory/4252-7-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-8-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-9-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-14-0x00000187B4050000-0x00000187B4C5A000-memory.dmp

        memory/4252-11-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-2-0x0000018799020000-0x000001879903A000-memory.dmp

        memory/4252-1-0x0000018798B70000-0x0000018798BAE000-memory.dmp

        memory/4252-15-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-13-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-16-0x00000187B3440000-0x00000187B3724000-memory.dmp

        memory/4252-3-0x00000187B32E0000-0x00000187B343A000-memory.dmp

        memory/4252-220-0x00007FFE2EF00000-0x00007FFE2F8A4000-memory.dmp

        memory/4252-215-0x00000187B3870000-0x00000187B38EA000-memory.dmp

        memory/4920-50-0x000001B813E70000-0x000001B813F70000-memory.dmp

        memory/4920-83-0x000001B814710000-0x000001B814730000-memory.dmp

        memory/4920-61-0x000001B803C90000-0x000001B803CB0000-memory.dmp

        memory/4920-49-0x000001B803930000-0x000001B803950000-memory.dmp

        memory/4920-36-0x000001B8001E0000-0x000001B8002E0000-memory.dmp

        memory/6016-210-0x000001FB00260000-0x000001FB00694000-memory.dmp