Overview

overview

8

Static

static

3

steamapps/...lp.dll

windows10-2004-x64

1

steamapps/...ic.dll

windows10-2004-x64

1

steamapps/...ic.dll

windows11-ltsc_2024-x64

6

steamapps/...64.dll

windows10-2004-x64

1

steamapps/...64.dll

windows11-ltsc_2024-x64

6

steamapps/...64.dll

windows10-2004-x64

1

steamapps/...64.dll

windows11-ltsc_2024-x64

8

steamapps/...64.dll

windows10-2004-x64

1

steamapps/...64.dll

windows11-ltsc_2024-x64

1

steamapps/...64.dll

windows10-2004-x64

1

steamapps/...64.dll

windows11-ltsc_2024-x64

1

steamapps/...st.dll

windows10-2004-x64

1

steamapps/...st.dll

windows11-ltsc_2024-x64

1

steamapps/...ng.dll

windows10-2004-x64

3

steamapps/...ng.dll

windows11-ltsc_2024-x64

3

steamapps/...64.exe

windows10-2004-x64

4

steamapps/...64.exe

windows11-ltsc_2024-x64

6

steamapps/...me.dll

windows10-2004-x64

1

steamapps/...me.dll

windows11-ltsc_2024-x64

1

steamapps/...ta.exe

windows10-2004-x64

7

steamapps/...ta.exe

windows11-ltsc_2024-x64

8

steamapps/...ta.exe

windows10-2004-x64

5

steamapps/...ta.exe

windows11-ltsc_2024-x64

8

steamapps/...re.dll

windows10-2004-x64

1

steamapps/...re.dll

windows11-ltsc_2024-x64

6

steamapps/...rs.dll

windows10-2004-x64

1

steamapps/...rs.dll

windows11-ltsc_2024-x64

6

steamapps/...ML.dll

windows10-2004-x64

1

steamapps/...ML.dll

windows11-ltsc_2024-x64

6

steamapps/...ng.exe

windows10-2004-x64

7

steamapps/...ng.exe

windows11-ltsc_2024-x64

3

steamapps/...64.dll

windows10-2004-x64

1

Analysis

  • max time kernel
    899s
  • max time network
    553s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    27/10/2026, 12:38

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General

  • Target
    steamapps/common/Osta/Engine/Extras/Redist/en-us/UEPrereqSetup_x64.exe
  • Size 48.2MB
  • Sample261027-pvccpstyaw
  • SHA256 a34cf70cc9c5520db58dd4c0344d4c5a645ffdd3055f123a8affac456cef6453
  • 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 2 IoCs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Loads dropped DLL 1 IoCs
  • 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
  • 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 58 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 40 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\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe
    "C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3576
    • C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe
      "C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Engine\Extras\Redist\en-us\UEPrereqSetup_x64.exe" -burn.unelevated BurnPipe.{FC8215E4-8E2F-4C7A-9D00-1ADD98B0617B} {C0662A95-B6BC-4F03-BA07-0FFF99201733} 3576
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:4448
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4876
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:5064
      • 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:3816
    • 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:2980
    • 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:1764
    • C:\Windows\System32\SecurityHealthHost.exe
      \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
      1⤵
        PID:1040

      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

            Banner.bmp
            • Path C:\Users\Admin\AppData\Local\Temp\{7675c6c6-b4bd-4206-855e-5e39d89ea708}\.ba1\Banner.bmp
            • Size 123KB
            • SHA256 b76bbf9f7b8da4ca886f3b97d7db00ab1d38a9bb3b9567f4e1c3e30203098add
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            LogoSide.png
            • Path C:\Users\Admin\AppData\Local\Temp\{7675c6c6-b4bd-4206-855e-5e39d89ea708}\.ba1\LogoSide.png
            • Size 6KB
            • SHA256 988c657d1cc77aceb4804c5217bf756eaa2b4defcb4d03f47aea83ccda3d3672
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            wixstdba.dll
            • Path C:\Users\Admin\AppData\Local\Temp\{7675c6c6-b4bd-4206-855e-5e39d89ea708}\.ba1\wixstdba.dll
            • Size 135KB
            • SHA256 97f1901e7c928b9231e503cd3a1315f0d8449356b9f25e7eb4c2cebeee72012a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            memory/2980-67-0x000001A4801E0000-0x000001A4802E0000-memory.dmp
            Download

            memory/2980-66-0x000001A4801E0000-0x000001A4802E0000-memory.dmp
            Download

            memory/2980-65-0x000001A4801E0000-0x000001A4802E0000-memory.dmp
            Download

            memory/2980-111-0x000001A494240000-0x000001A494260000-memory.dmp
            Download

            memory/2980-97-0x000001A483D60000-0x000001A483D80000-memory.dmp
            Download

            memory/2980-74-0x000001A493E60000-0x000001A493F60000-memory.dmp
            Download

            memory/2980-72-0x000001A483A40000-0x000001A483A60000-memory.dmp
            Download