Overview

overview

8

Static

static

3

update4_21[F].exe

windows10-2004-x64

7

update4_21[F].exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    104s
  • max time network
    54s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/07/2026, 12:15

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General

  • Target
    update4_21[F].exe
  • Size 1.4MB
  • Sample260701-pe2mnadx2p
  • SHA256 da0d3c11ade5c1d86284a1056e593dc1e0aa8ab11aa9a032ed8448c5218e15a4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarediscoveryinstallerpersistenceransomwarespyware

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 1 IoCs
  • 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 2 IoCs

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

    discovery
  • Inno Setup is an open-source installation builder for Windows applications. 2 IoCs

    Inno Setup installer

    installer
  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 2 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\update4_21[F].exe
    "C:\Users\Admin\AppData\Local\Temp\update4_21[F].exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5964
    • C:\Users\Admin\AppData\Local\Temp\is-FQ7NU.tmp\update4_21[F].tmp
      "C:\Users\Admin\AppData\Local\Temp\is-FQ7NU.tmp\update4_21[F].tmp" /SL5="$502BE,1269402,54272,C:\Users\Admin\AppData\Local\Temp\update4_21[F].exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2928
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3640
    • 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:3984
  • 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:5500
  • 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:3396
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4588

    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

          update4_21[F].tmp
          • Path C:\Users\Admin\AppData\Local\Temp\is-FQ7NU.tmp\update4_21[F].tmp
          • Size 688KB
          • SHA256 c5177fdc6031728e10141745cd69edbc91c92d14411a2dec6e8e8caa4f74ab28
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/2928-48-0x0000000000400000-0x00000000004BC000-memory.dmp
          Download

          memory/2928-8-0x0000000000400000-0x00000000004BC000-memory.dmp
          Download

          memory/2928-12-0x0000000000400000-0x00000000004BC000-memory.dmp
          Download

          memory/2928-15-0x0000000000400000-0x00000000004BC000-memory.dmp
          Download

          memory/3984-203-0x000000000E7A0000-0x000000000F01B000-memory.dmp
          Download

          memory/3984-204-0x00000000040B0000-0x000000000427A000-memory.dmp
          Download

          memory/5500-62-0x0000026403C90000-0x0000026403CB0000-memory.dmp
          Download

          memory/5500-43-0x00000264001E0000-0x00000264002E0000-memory.dmp
          Download

          memory/5500-90-0x00000264142D0000-0x00000264142F0000-memory.dmp
          Download

          memory/5500-53-0x0000026403E30000-0x0000026403F30000-memory.dmp
          Download

          memory/5500-51-0x0000026403A30000-0x0000026403A50000-memory.dmp
          Download

          memory/5964-0-0x000000000040D000-0x000000000040E000-memory.dmp
          Download

          memory/5964-1-0x0000000000400000-0x0000000000414000-memory.dmp
          Download

          memory/5964-16-0x0000000000400000-0x0000000000414000-memory.dmp
          Download