Overview

overview

10

Static

static

10

MasonClient.exe

windows10-ltsc_2021-x64

10

MasonClient.exe

windows10-2004-x64

10

MasonClient.exe

windows11-21h2-x64

10

MasonClient.exe

windows11-ltsc_2024-x64

10

MasonClient.exe

android-10-x64

MasonClient.exe

android-11-x64

MasonClient.exe

android-13-x64

MasonClient.exe

android-14-x64

MasonClient.exe

android-15-x64

MasonClient.exe

android-9-x86

MasonClient.exe

macos-10.15-amd64

1

MasonClient.exe

debian-12-armhf

MasonClient.exe

debian-12-mipsel

MasonClient.exe

debian-9-armhf

MasonClient.exe

debian-9-mips

MasonClient.exe

debian-9-mipsel

MasonClient.exe

ubuntu-18.04-amd64

MasonClient.exe

ubuntu-20.04-amd64

MasonClient.exe

ubuntu-22.04-amd64

MasonClient.exe

ubuntu-24.04-amd64

Sharing

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General

  • Target
    MasonClient.exe
  • Size 49KB
  • Sample260922-satm2agg76
  • SHA256 7a7281ec920f9cec2db04b711d268cb3a1f56c559ccda8affabdec2aa6c1af86
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
trojanneptunerat

Malware Config

Extracted

Family

  • neptunerat

C2

  • fduhgnduhgd-42552.portmap.host:42552

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    g4iwvBAV8XRPb7ng

  • rat_name

    MasonRAT

Signatures

  • Family: NeptuneRAT, MasonRAT

    NeptuneRAT aka MasonRAT is a trojan written in C#.

    trojanneptunerat
  • Detects NeptuneRAT stealer 1 IoCs
  • Unsigned PE 1 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • MasonClient.exe
    .exe 49KB

MasonClient.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 7a7281ec920f9cec2db04b711d268cb3a1f56c559ccda8affabdec2aa6c1af86
  • MD5 SHA1 SHA512 SSDEEP TLSH
windows:4windowsx86arch:x86

  • Detects NeptuneRAT stealer

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
55390
Magic Number
267
Subsystem
IMAGE_SUBSYSTEM_WINDOWS_GUI
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_NO_SEH IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_32BIT_MACHINE
PDB paths