Analysis

  • max time kernel
    104s
  • max time network
    135s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/07/2026, 12:14

General

  • Target
    BulkMailer_App/email_recipients_sample.xlsx
  • Size 5KB
  • Sample260708-peh6baft31
  • SHA256 88c0ab7c4ce0c85a842f570b442735f53140f012e3732b965a3c1499efe08be7
  • 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.

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

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 38 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 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 17 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.

  • Uses Volume Shadow Copy WMI provider

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

  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\BulkMailer_App\email_recipients_sample.xlsx"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:5220
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5848
    • 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:4544
  • 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:1176
  • 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:912

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 603B
        • SHA256 b162cad3e5056ed4fc0b7ea8dcb12c1ef3631852158a72df85c1ec280c90ce97
        • MD5 SHA1 SHA512 TLSH

        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

        b8ab77100df80ab2.customDestinations-ms

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
        • Size 1KB
        • SHA256 69ce312d8502f3c9bc6322fd6370c21a11d38cf7de897f61aed99f981a78060e
        • MD5 SHA1 SHA512 TLSH

        memory/912-209-0x0000022AE1860000-0x0000022AE1C94000-memory.dmp

        memory/1176-63-0x000001EE81A40000-0x000001EE81A60000-memory.dmp

        memory/1176-64-0x000001EE81EF0000-0x000001EE81FF0000-memory.dmp

        memory/1176-75-0x000001EE81DE0000-0x000001EE81E00000-memory.dmp

        memory/1176-89-0x000001EE942A0000-0x000001EE942C0000-memory.dmp

        memory/1176-24-0x000001EE801E0000-0x000001EE802E0000-memory.dmp

        memory/5220-6-0x00007FFF4A260000-0x00007FFF4A270000-memory.dmp

        memory/5220-7-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-9-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-13-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-14-0x00007FFF47730000-0x00007FFF47740000-memory.dmp

        memory/5220-12-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-15-0x00007FFF47730000-0x00007FFF47740000-memory.dmp

        memory/5220-17-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-10-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-11-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-8-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-0-0x00007FFF4A260000-0x00007FFF4A270000-memory.dmp

        memory/5220-5-0x00007FFF4A260000-0x00007FFF4A270000-memory.dmp

        memory/5220-4-0x00007FFF8A120000-0x00007FFF8A383000-memory.dmp

        memory/5220-1-0x00007FFF4A260000-0x00007FFF4A270000-memory.dmp

        memory/5220-3-0x00007FFF8A27F000-0x00007FFF8A280000-memory.dmp

        memory/5220-2-0x00007FFF4A260000-0x00007FFF4A270000-memory.dmp