General

  • Target
    MasonClient.exe
  • Size 48KB
  • Sample261024-kr464aax6m
  • SHA256 5d8fae478eff7164a85415b030a758cf623d9a64c7725ea10419933780e2273b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • jhhmcdxi4o.localto.net:2547

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    E6eknZOGNhzlMLIX

  • rat_name

    MasonRAT

Targets

    • Target
      MasonClient.exe
    • Size 48KB
    • SHA256 5d8fae478eff7164a85415b030a758cf623d9a64c7725ea10419933780e2273b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Disables Task Manager via registry modification

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v16

Tasks