Overview

overview

7

Static

static

3

MasonClient.exe

windows10-2004-x64

7

MasonClient.exe

windows11-21h2-x64

7

Analysis

  • user interaction
    yes
  • max time kernel
    599s
  • max time network
    597s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/04/2026, 08:16

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General

  • Target
    MasonClient.exe
  • Size 48KB
  • Sample260422-j56fmsft2v
  • SHA256 380b3a029ab0906718ef03b7a9efe2c96c07466c3d4ecf35b852fe0dfb9a936f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
executionpersistence

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 11 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • 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 behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 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\MasonClient.exe
    "C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1084
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2940
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1028
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:2336
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4208
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4328
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:5112
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3036
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2940
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:328
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4492
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3628
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4304
  • C:\Users\Admin\AppData\Roaming\MasonClient.exe
    C:\Users\Admin\AppData\Roaming\MasonClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2848

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        MasonClient.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MasonClient.exe.log
        • Size 654B
        • SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        MasonClient.exe
        • Path C:\Users\Admin\AppData\Roaming\MasonClient.exe
        • Size 48KB
        • SHA256 380b3a029ab0906718ef03b7a9efe2c96c07466c3d4ecf35b852fe0dfb9a936f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1084-0-0x0000000000780000-0x0000000000792000-memory.dmp
        Download

        memory/1084-2-0x000000001B5F0000-0x000000001B600000-memory.dmp
        Download

        memory/1084-6-0x000000001B3D0000-0x000000001B3DC000-memory.dmp
        Download

        memory/1084-7-0x000000001B5F0000-0x000000001B600000-memory.dmp
        Download

        memory/2336-17-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-9-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-10-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-20-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-19-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-18-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-16-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-15-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
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        memory/2336-14-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download

        memory/2336-8-0x0000012ABA9C0000-0x0000012ABA9C1000-memory.dmp
        Download