Overview

overview

9

Static

static

1

SteamSetup.exe

windows10-2004-x64

9

SteamSetup.exe

windows11-ltsc_2024-x64

6

$PLUGINSDI...er.bmp

windows10-2004-x64

1

$PLUGINSDI...er.bmp

windows11-ltsc_2024-x64

1

$PLUGINSDI...rd.bmp

windows10-2004-x64

1

$PLUGINSDI...rd.bmp

windows11-ltsc_2024-x64

1

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

public/ste...ch.txt

windows10-2004-x64

1

public/ste...ch.txt

windows11-ltsc_2024-x64

1

public/ste...sh.txt

windows10-2004-x64

1

public/ste...sh.txt

windows11-ltsc_2024-x64

1

public/ste...ch.txt

windows10-2004-x64

1

public/ste...ch.txt

windows11-ltsc_2024-x64

1

public/ste...sh.txt

windows10-2004-x64

1

public/ste...sh.txt

windows11-ltsc_2024-x64

1

public/ste...sh.txt

windows10-2004-x64

1

public/ste...sh.txt

windows11-ltsc_2024-x64

1

public/ste...ch.txt

windows10-2004-x64

1

public/ste...ch.txt

windows11-ltsc_2024-x64

8

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

public/ste...ek.txt

windows10-2004-x64

1

public/ste...ek.txt

windows11-ltsc_2024-x64

8

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

public/ste...an.txt

windows10-2004-x64

1

public/ste...an.txt

windows11-ltsc_2024-x64

1

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    28/06/2026, 08:32

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General

  • Target
    public/steambootstrapper_french.txt
  • Size 4KB
  • Sample260628-kfkcjsf19v
  • SHA256 a1f6ba57ee41e009d904905c0ce5e75a59ee6790e08542561303109e1faafa13
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarepersistenceransomwarespyware

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 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
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 3 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:\Windows\system32\NOTEPAD.EXE
    C:\Windows\system32\NOTEPAD.EXE C:\Users\Admin\AppData\Local\Temp\public\steambootstrapper_french.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:3396
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3768
    • 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:2584
  • 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:1272
  • 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:4512

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

        memory/1272-1-0x0000026980170000-0x0000026980270000-memory.dmp
        Download

        memory/1272-3-0x0000026980170000-0x0000026980270000-memory.dmp
        Download

        memory/1272-66-0x00000269843F0000-0x0000026984410000-memory.dmp
        Download

        memory/1272-43-0x0000026983E10000-0x0000026983E30000-memory.dmp
        Download

        memory/1272-35-0x00000269840B0000-0x00000269841B0000-memory.dmp
        Download

        memory/1272-34-0x0000026983C90000-0x0000026983CB0000-memory.dmp
        Download

        memory/1272-185-0x0000026997A00000-0x00000269992DC000-memory.dmp
        Download

        memory/2584-184-0x0000000005D30000-0x0000000005D74000-memory.dmp
        Download