Overview

overview

8

Static

static

3

boykisser.exe

windows10-2004-x64

8

boykisser.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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, 05:54

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General

  • Target
    boykisser.exe
  • Size 4.2MB
  • Sample260701-gl7s9ahs61
  • SHA256 c51ac4c8efb75271dfb7b5c69ca37b61616e2d9c3659d83c89709f7a065ad6cb
  • 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 2 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 43 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:1124
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -EncodedCommand UwB0AGEAcgB0AC0AUAByAG8AYwBlAHMAcwAgAC0AVgBlAHIAYgAgAFIAdQBuAEEAcwAgAC0ARgBpAGwAZQBQAGEAdABoACAAJwBDADoAXABVAHMAZQByAHMAXABBAGQAbQBpAG4AXABBAHAAcABEAGEAdABhAFwATABvAGMAYQBsAFwAVABlAG0AcABcAGIAbwB5AGsAaQBzAHMAZQByAC4AZQB4AGUAJwAgAC0AQQByAGcAdQBtAGUAbgB0AEwAaQBzAHQAIAAnAC0ALQBlAGwAZQB2AGEAdABlAGQAJwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4A
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4308
      • 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:764
        • 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:2728
        • 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:1740
        • C:\Windows\system32\cmd.exe
          "cmd" /c reg delete HKLM\BCD00000000 /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:564
          • C:\Windows\system32\reg.exe
            reg delete HKLM\BCD00000000 /f
            5⤵
            • Modifies registry key
            PID:5856
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2160
    • 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:3692
  • 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:3712
  • 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:5140
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:3864

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          LOGS.TXT
          • Path C:\USERS\ADMIN\DESKTOP\LOGS.TXT
          • Size 615B
          • SHA256 61afb931099a82bf4cc6c2a7eade5328bc169edf8775c073544c85616072dfcc
          • 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 253B
          • SHA256 a60f6a7198356ceb488bce0c90ffe57b5ea5b9e37f527ad48b39534815a49195
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/764-21-0x00007FF719F40000-0x00007FF71A526000-memory.dmp
          Download

          memory/764-44-0x00007FF719F40000-0x00007FF71A526000-memory.dmp
          Download

          memory/1124-5-0x00007FF719F40000-0x00007FF71A526000-memory.dmp
          Download

          memory/1124-0-0x00007FF719F40000-0x00007FF71A526000-memory.dmp
          Download

          memory/3712-64-0x000001E9801E0000-0x000001E9802E0000-memory.dmp
          Download

          memory/3712-98-0x000001E983E10000-0x000001E983E30000-memory.dmp
          Download

          memory/3712-234-0x000001E997A00000-0x000001E997C9E000-memory.dmp
          Download

          memory/3712-79-0x000001E993E90000-0x000001E993F90000-memory.dmp
          Download

          memory/3712-112-0x000001E994250000-0x000001E994270000-memory.dmp
          Download

          memory/3712-65-0x000001E9801E0000-0x000001E9802E0000-memory.dmp
          Download

          memory/3712-66-0x000001E9801E0000-0x000001E9802E0000-memory.dmp
          Download

          memory/3712-78-0x000001E983A30000-0x000001E983A50000-memory.dmp
          Download

          memory/4308-17-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-9-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-8-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-7-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-13-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-12-0x00000121E1400000-0x00000121E1422000-memory.dmp
          Download

          memory/4308-6-0x00007FF8E6C9F000-0x00007FF8E6CA0000-memory.dmp
          Download

          memory/4308-14-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-20-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-19-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-16-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/4308-15-0x00007FF8E6B10000-0x00007FF8E74B4000-memory.dmp
          Download

          memory/5140-235-0x00000250BD000000-0x00000250BD29E000-memory.dmp
          Download