Overview

overview

10

Static

static

10

NullCore Executor.exe

windows10-2004-x64

10

NullCore Executor.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    NullCore Executor.exe
  • Size 142KB
  • Sample260901-vj93gsshme
  • SHA256 e060c0af464ce7ec1d74ce8246814e2fb184ba831a446cb9198f0ee1f4486bd1
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
neptuneratxwormexecutionpersistenceprivilege_escalationransomwarerattrojan

Malware Config

Targets

    • Target
      NullCore Executor.exe
    • Size 142KB
    • SHA256 e060c0af464ce7ec1d74ce8246814e2fb184ba831a446cb9198f0ee1f4486bd1
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    executionneptuneratxwormpersistenceprivilege_escalationransomwarerattrojan

    • Detect Xworm Payload

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

      trojanneptunerat

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

      trojanratxworm

    • Checks computer location settings

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

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

      persistenceprivilege_escalation

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks