Overview

overview

10

Static

static

10

MasonClient.exe

windows11-21h2-x64

Resubmissions

09/09/2026, 02:08

260909-ckjb2szhqh10

09/09/2026, 02:05

260909-ch22daz1ax10

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General

  • Target
    MasonClient.exe
  • Size 48KB
  • Sample260909-ch22daz1ax
  • SHA256 43cc08aca48880f14350605bb260175ab9a8161f430f00dd6093d446d7294fcf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratbootkitdefense_evasiondiscoveryexecutionpersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • 6.tcp.cpolar.top:13688

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    bWc5ktu6UuZpBjtw

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 43cc08aca48880f14350605bb260175ab9a8161f430f00dd6093d446d7294fcf
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    bootkitdefense_evasiondiscoveryexecutionneptuneratpersistencetrojan

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Disables Task Manager via registry modification

      defense_evasion

    • Executes dropped EXE

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v16

Tasks