General

  • Target
    powershell.exe
  • Size 1.8MB
  • Sample260907-1apyvagp7x
  • SHA256 5ba7cebac34a0b112719ee72d3d169dbf8a590a3a66da7dcf7b3e03b1acc567a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • neptunerat

C2
  • cryckLcracker-41656.portmap.host:41656

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    OX8KRYKr8ZsL8rQJ

  • rat_name

    MasonRAT

Targets

    • Target
      powershell.exe
    • Size 1.8MB
    • SHA256 5ba7cebac34a0b112719ee72d3d169dbf8a590a3a66da7dcf7b3e03b1acc567a
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects DonutLoader

    • Detects NeptuneRAT stealer

    • Family: DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks