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
    549s
  • 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

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    steamapps/common/Osta/Osta.exe
  • Size 391KB
  • Sample261027-pvccpstyaw
  • SHA256 060475805196e6bf8fa7d9c14aa42d4cebfb98c5dfeaf84b23db5cdb2a76022f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwaredefense_evasionpersistenceransomwarespyware

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.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 1 IoCs
    defense_evasion
  • 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 39 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 42 IoCs
  • Suspicious use of SetWindowsHookEx 4 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.

    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\Osta.exe
    "C:\Users\Admin\AppData\Local\Temp\steamapps\common\Osta\Osta.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies registry class
    PID:4668
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:2916
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:2528
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4724
      • 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:5740
    • 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:3592
    • 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:1624
    • C:\Windows\System32\SecurityHealthHost.exe
      \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
      1⤵
        PID:672

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

            Loading Replay Monitor...

            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 595B
            • SHA256 d4e60617c2afab8263febabe7f14f18595715078d71307a8cefe0707dae76dee
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            memory/3592-57-0x0000013A14240000-0x0000013A14260000-memory.dmp
            Download

            memory/3592-43-0x0000013A01DA0000-0x0000013A01DC0000-memory.dmp
            Download

            memory/3592-26-0x0000013A01E60000-0x0000013A01F60000-memory.dmp
            Download

            memory/3592-24-0x0000013A01A20000-0x0000013A01A40000-memory.dmp
            Download

            memory/3592-12-0x0000013A001E0000-0x0000013A002E0000-memory.dmp
            Download

            memory/4668-0-0x0000000180000000-0x0000000180039000-memory.dmp
            Download