Overview

overview

10

Static

static

10

MasonClient213.exe

windows10-2004-x64

10

MasonClient213.exe

windows10-ltsc_2021-x64

10

MasonClient213.exe

windows11-21h2-x64

10

MasonClient213.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    28/07/2026, 03:16

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General

  • Target
    MasonClient213.exe
  • Size 48KB
  • Sample260728-dsxp3sal4x
  • SHA256 baeb473f2af5ca7bc8d4ad3c14ac8c158d6466fca4991e12483332d39a42b45d
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
executionneptuneratpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • elokedsgdksg4444-33157.portmap.host:701

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    D03yHAQXXug1R59r

  • rat_name

    MasonRAT

Signatures

  • Family: NeptuneRAT, MasonRAT

    NeptuneRAT aka MasonRAT is a trojan written in C#.

    trojanneptunerat
  • Detects NeptuneRAT stealer 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious use of AdjustPrivilegeToken 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\MasonClient213.exe
    "C:\Users\Admin\AppData\Local\Temp\MasonClient213.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3916
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClient213" /tr "C:\Users\Admin\AppData\Roaming\MasonClient213.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:5708
  • C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:5200
  • C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:5528
  • C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    C:\Users\Admin\AppData\Roaming\MasonClient213.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:6108

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        MasonClient213.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MasonClient213.exe.log
        • Size 654B
        • SHA256 e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        MasonClient213.exe
        • Path C:\Users\Admin\AppData\Roaming\MasonClient213.exe
        • Size 48KB
        • SHA256 baeb473f2af5ca7bc8d4ad3c14ac8c158d6466fca4991e12483332d39a42b45d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/3916-0-0x0000000000EB0000-0x0000000000EC2000-memory.dmp
        Download

        memory/3916-2-0x000000001CA50000-0x000000001CA60000-memory.dmp
        Download

        memory/3916-6-0x000000001CA50000-0x000000001CA60000-memory.dmp
        Download