Overview

overview

10

Static

static

10

staemtoolS.exe

windows10-ltsc_2021-x64

staemtoolS.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    staemtoolS.exe
  • Size 48KB
  • Sample260627-r7dgmsbt41
  • SHA256 46054542dc2c43f6564d256efeedf3f2d50122e424e5c907c78dfac14f9c987a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratbootkitdefense_evasiondiscoverypersistencetrojan

Malware Config

Extracted

Family

  • neptunerat

C2

  • bore.pub:60872

Targets

    • Target
      staemtoolS.exe
    • Size 48KB
    • SHA256 46054542dc2c43f6564d256efeedf3f2d50122e424e5c907c78dfac14f9c987a
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    bootkitdefense_evasiondiscoveryneptuneratpersistencetrojan

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Disables Task Manager via registry modification

      defense_evasion

    • Checks computer location settings

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

    • 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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks