Overview

overview

6

Static

static

1

BESTCOMSPl...er.exe

windows10-2004-x64

6

BESTCOMSPl...er.exe

windows11-ltsc_2024-x64

6

Analysis

  • max time kernel
    127s
  • max time network
    145s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260618-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    23/06/2026, 16:20

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General

  • Target
    BESTCOMSPlus_51201_Installer.exe
  • Size 274.5MB
  • Sample260623-tth63set4x
  • SHA256 d0b29db1002941db89d66fc843e96b6c1b775aca667f75787dfe1f233f471164
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
adwarediscoverypersistenceransomwarespyware

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 25 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

    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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 4 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\BESTCOMSPlus_51201_Installer.exe
    "C:\Users\Admin\AppData\Local\Temp\BESTCOMSPlus_51201_Installer.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6068
    • C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\Gui.exe
      Gui.exe en
      2⤵
      • Enumerates connected drives
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1896
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:3956
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:416
    • 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:5768
  • 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:1340
  • 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:6124
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:1300

    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

          Gui.exe
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\Gui.exe
          • Size 253KB
          • SHA256 99fae9a081cb4bd9af768ff9b971d26e2f1d8deb3ef65a48603dfc34461cc467
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Gui.exe.config
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\Gui.exe.config
          • Size 158B
          • SHA256 092af75656250237961fe357c98605a35bbb934c2266f0ce78ed37a35c41d348
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          IntermediateBootstrapper.dll
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\IntermediateBootstrapper.dll
          • Size 541KB
          • SHA256 c81e387b39a6aec10161993224e26e1f89a1f38988fbfc4d9dfa1858edb048ad
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Package_x64.msi
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\Package_x64.msi
          • Size 484KB
          • SHA256 10e64b6d64645ae3c00d582466a0089d41998162c589b6d6c2d2d7db6d88830f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          SharpSetup.WinForms.dll
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\SharpSetup.WinForms.dll
          • Size 1.1MB
          • SHA256 e353895ec239f2fb24a8a1c60ffb54c7c71018ee71ee3623c1b625165d579dda
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          SharpSetup.dll
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\SharpSetup.dll
          • Size 252KB
          • SHA256 7f4db7714c3a00941e8971726239558ffef7ce3118375829c998405f332e31ab
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          SharpSetup.WinForms.resources.dll
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\en\SharpSetup.WinForms.resources.dll
          • Size 1.1MB
          • SHA256 a4eef6c0989e9eed9e6547e9fb2e773e33b5672eee4b2ebbd2dba9cd2eec846a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          SharpSetup.resources.dll
          • Path C:\Users\Admin\AppData\Local\Temp\sfx.{636A0EFA-5A6A-4EA0-9546-496A9B8D76A4}.dir\en\SharpSetup.resources.dll
          • Size 37KB
          • SHA256 b45a5ddc6855be1bd33f7a92662b6efb62ffbf961ffa0aac1e1bbcd4fbee552e
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/1340-76-0x0000015482ED0000-0x0000015482FD0000-memory.dmp
          Download

          memory/1340-74-0x0000015482AB0000-0x0000015482AD0000-memory.dmp
          Download

          memory/1340-115-0x0000015494310000-0x0000015494330000-memory.dmp
          Download

          memory/1340-50-0x00000154801E0000-0x00000154802E0000-memory.dmp
          Download

          memory/1340-91-0x0000015482E90000-0x0000015482EB0000-memory.dmp
          Download

          memory/1896-39-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-33-0x000000001C0D0000-0x000000001C1FA000-memory.dmp
          Download

          memory/1896-27-0x00007FFC3A90F000-0x00007FFC3A910000-memory.dmp
          Download

          memory/1896-40-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-41-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-37-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-45-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-34-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-43-0x000000001FF10000-0x000000001FF20000-memory.dmp
          Download

          memory/1896-28-0x0000000000F00000-0x0000000000F44000-memory.dmp
          Download

          memory/1896-47-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-48-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-36-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-38-0x000000001C200000-0x000000001C31A000-memory.dmp
          Download

          memory/1896-32-0x00007FFC3A780000-0x00007FFC3B124000-memory.dmp
          Download

          memory/1896-30-0x000000001BAF0000-0x000000001BB36000-memory.dmp
          Download

          memory/6068-46-0x0000000002E00000-0x0000000002E01000-memory.dmp
          Download

          memory/6068-0-0x0000000002E00000-0x0000000002E01000-memory.dmp
          Download