Overview

overview

9

Static

static

3

NeptuneCrypter.exe

windows10-2004-x64

9

NeptuneCrypter.exe

windows11-ltsc_2024-x64

9

Analysis

  • max time kernel
    98s
  • max time network
    150s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/07/2026, 00:17

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General

  • Target
    NeptuneCrypter.exe
  • Size 2.2MB
  • Sample260709-ak5tyaby8x
  • SHA256 1c8ff8fe62c458840d26999e412d6c91132fca3485a2146670469fde13aedd83
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
adwaredefense_evasiondiscoverypersistenceransomwarespyware

Malware Config

Signatures

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
    defense_evasion
  • 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
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
    defense_evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • ConfuserEx .NET packer 1 IoCs

    Detects ConfuserEx .NET packer.

  • System Location Discovery: System Language Discovery 1 TTPs 1 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 34 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of FindShellTrayWindow 53 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:\Users\Admin\AppData\Local\Temp\NeptuneCrypter.exe
    "C:\Users\Admin\AppData\Local\Temp\NeptuneCrypter.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1948
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4528
    • 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:3396
  • 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:2196
  • 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:1868

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 607B
        • SHA256 be6b74e52e5eef1f1c27c0976bf3bf1bfa99958c00bbef2898a602f691be6dae
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/1948-12-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-9-0x0000000007310000-0x0000000007366000-memory.dmp
        Download

        memory/1948-3-0x0000000005E80000-0x0000000006052000-memory.dmp
        Download

        memory/1948-4-0x00000000060F0000-0x000000000618C000-memory.dmp
        Download

        memory/1948-5-0x0000000006750000-0x0000000006D0A000-memory.dmp
        Download

        memory/1948-6-0x0000000006300000-0x0000000006366000-memory.dmp
        Download

        memory/1948-7-0x0000000007270000-0x0000000007302000-memory.dmp
        Download

        memory/1948-13-0x00000000741A2000-0x00000000741A3000-memory.dmp
        Download

        memory/1948-0-0x00000000741A2000-0x00000000741A3000-memory.dmp
        Download

        memory/1948-10-0x0000000007E20000-0x00000000081F6000-memory.dmp
        Download

        memory/1948-2-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-11-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-8-0x0000000006720000-0x000000000672A000-memory.dmp
        Download

        memory/1948-14-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-15-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-16-0x0000000074190000-0x000000007494C000-memory.dmp
        Download

        memory/1948-1-0x0000000000080000-0x00000000002C8000-memory.dmp
        Download

        memory/2196-37-0x000001E7801E0000-0x000001E7802E0000-memory.dmp
        Download

        memory/2196-83-0x000001E7943B0000-0x000001E7943D0000-memory.dmp
        Download

        memory/2196-68-0x000001E794390000-0x000001E7943B0000-memory.dmp
        Download

        memory/2196-42-0x000001E782B70000-0x000001E782B90000-memory.dmp
        Download

        memory/2196-43-0x000001E782EE0000-0x000001E782FE0000-memory.dmp
        Download

        memory/3396-205-0x000000000A930000-0x000000000AB8F000-memory.dmp
        Download