Overview

overview

8

Static

static

3

99b41a3ffe...58.exe

windows11-ltsc_2024-x64

8

Analysis

  • user interaction
    yes
  • max time kernel
    899s
  • max time network
    547s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    10/11/2026, 08:36

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General

  • Target
    99b41a3ffef3e2d26ad47f46e616dae81b3991c3705a7892a92e2ffd74307658.exe
  • Size 261KB
  • Sample261110-khsrpseb26
  • SHA256 99b41a3ffef3e2d26ad47f46e616dae81b3991c3705a7892a92e2ffd74307658
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarediscoveryexecutionpersistenceransomwarespyware

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
  • Enumerates connected drives 3 TTPs 2 IoCs

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

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

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

    execution
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

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

    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 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 3 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\99b41a3ffef3e2d26ad47f46e616dae81b3991c3705a7892a92e2ffd74307658.exe
    "C:\Users\Admin\AppData\Local\Temp\99b41a3ffef3e2d26ad47f46e616dae81b3991c3705a7892a92e2ffd74307658.exe"
    1⤵
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3204
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{8B560DB0-E052-4D77-9E85-0D55966C1A21}'" delete
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:2792
      • C:\Windows\System32\wbem\WMIC.exe
        C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{8B560DB0-E052-4D77-9E85-0D55966C1A21}'" delete
        3⤵
        • Reads the TCP/IP host and domain name from the registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:396
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1684
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:5328
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:5404
      • 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:5564
    • 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:4052
    • 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:1912
    • C:\Windows\System32\SecurityHealthHost.exe
      \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
      1⤵
        PID:2600

      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 591B
            • SHA256 dc216c11d6381abdcb6a4b927fd9ea68d336ff63c88639e4a242acf037f90c68
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            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 562B
            • SHA256 2a2e893cf659e7fb79658057731b9c3ad4b4652bb26944c9fad23c147af1707c
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            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

            memory/1912-223-0x00000167808A0000-0x0000016780B5C000-memory.dmp
            Download

            memory/1912-216-0x00000167B0000000-0x00000167B0691000-memory.dmp
            Download

            memory/1912-198-0x00000167808A0000-0x0000016780B5C000-memory.dmp
            Download

            memory/1912-197-0x00000167B0000000-0x00000167B0691000-memory.dmp
            Download

            memory/4052-68-0x000002A6972C0000-0x000002A6972E0000-memory.dmp
            Download

            memory/4052-47-0x000002A6869B0000-0x000002A6869D0000-memory.dmp
            Download

            memory/4052-38-0x000002A696AD0000-0x000002A696BD0000-memory.dmp
            Download

            memory/4052-37-0x000002A6868B0000-0x000002A6868D0000-memory.dmp
            Download

            memory/4052-3-0x000002A682EB0000-0x000002A682FB0000-memory.dmp
            Download

            memory/5564-196-0x000000000E370000-0x000000000E3CA000-memory.dmp
            Download