Overview

overview

8

Static

static

3

boykisser.exe

windows10-2004-x64

8

boykisser.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    120s
  • max time network
    137s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/07/2026, 05:04

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General

  • Target
    boykisser.exe
  • Size 3.0MB
  • Sample260701-fp8paaex9j
  • SHA256 8f00aba20b6e224570ed5eaa4671ee847381bb94a34dd18ca9bd179d18ebc2a2
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarebootkitdefense_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
  • Disables Task Manager via registry modification
    defense_evasion
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

    defense_evasion
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • 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
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 7 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\boykisser.exe
    "C:\Users\Admin\AppData\Local\Temp\boykisser.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3104
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -EncodedCommand UwB0AGEAcgB0AC0AUAByAG8AYwBlAHMAcwAgAC0AVgBlAHIAYgAgAFIAdQBuAEEAcwAgAC0ARgBpAGwAZQBQAGEAdABoACAAJwBDADoAXABVAHMAZQByAHMAXABBAGQAbQBpAG4AXABBAHAAcABEAGEAdABhAFwATABvAGMAYQBsAFwAVABlAG0AcABcAGIAbwB5AGsAaQBzAHMAZQByAC4AZQB4AGUAJwAgAC0AQQByAGcAdQBtAGUAbgB0AEwAaQBzAHQAIAAnAC0ALQBlAGwAZQB2AGEAdABlAGQAJwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4A
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:6024
      • C:\Users\Admin\AppData\Local\Temp\boykisser.exe
        "C:\Users\Admin\AppData\Local\Temp\boykisser.exe" --elevated
        3⤵
        • Writes to the Master Boot Record (MBR)
        • Sets desktop wallpaper using registry
        • Suspicious use of WriteProcessMemory
        PID:2664
        • C:\Windows\system32\reg.exe
          "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
          4⤵
          • Modifies registry key
          PID:6108
        • C:\Windows\system32\reg.exe
          "reg" add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
          4⤵
          • Modifies registry key
          PID:3396
        • C:\Windows\system32\cmd.exe
          "cmd" /c reg delete HKLM\BCD00000000 /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4760
          • C:\Windows\system32\reg.exe
            reg delete HKLM\BCD00000000 /f
            5⤵
            • Modifies registry key
            PID:2448
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4936
    • 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:4996
  • 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:5540
  • 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:6132

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        LOGS.TXT
        • Path C:\USERS\ADMIN\DESKTOP\LOGS.TXT
        • Size 501B
        • SHA256 b201826b39ff7229f96a8eddb9c2970776478d721162c91417f99510ea0bb9ad
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        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

        logs.txt
        • Path C:\Users\Admin\Desktop\logs.txt
        • Size 227B
        • SHA256 a553a1bf3a6799c9e2125574b19db60d42eecc96569c2096508ac386cbfbf329
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/2664-18-0x00007FF6F4F00000-0x00007FF6F5480000-memory.dmp
        Download

        memory/2664-40-0x00007FF6F4F00000-0x00007FF6F5480000-memory.dmp
        Download

        memory/2664-24-0x00007FF6F4F00000-0x00007FF6F5480000-memory.dmp
        Download

        memory/3104-5-0x00007FF6F4F00000-0x00007FF6F5480000-memory.dmp
        Download

        memory/3104-0-0x00007FF6F4F00000-0x00007FF6F5480000-memory.dmp
        Download

        memory/4996-221-0x000000000E940000-0x000000000F1BB000-memory.dmp
        Download

        memory/5540-108-0x000001AB94200000-0x000001AB94220000-memory.dmp
        Download

        memory/5540-62-0x000001AB801E0000-0x000001AB802E0000-memory.dmp
        Download

        memory/5540-84-0x000001AB83C80000-0x000001AB83CA0000-memory.dmp
        Download

        memory/5540-76-0x000001AB93E80000-0x000001AB93F80000-memory.dmp
        Download

        memory/5540-75-0x000001AB83A20000-0x000001AB83A40000-memory.dmp
        Download

        memory/6024-13-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-11-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-10-0x0000025D19FE0000-0x0000025D1A002000-memory.dmp
        Download

        memory/6024-12-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-7-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-17-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-14-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-16-0x00007FF8DFC70000-0x00007FF8E0614000-memory.dmp
        Download

        memory/6024-6-0x00007FF8DFDFF000-0x00007FF8DFE00000-memory.dmp
        Download

        memory/6132-222-0x000002CC88C20000-0x000002CC88EDC000-memory.dmp
        Download

        memory/6132-239-0x000002CC88C20000-0x000002CC88EDC000-memory.dmp
        Download