General

  • Target
    win40ed.exe
  • Size 2.3MB
  • Sample261107-x7fjwsft7k
  • SHA256 5c05c8d9ff8205af0d9b581fdfdc257cc59b6c729fa0d5060a2f48a932675d79
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      win40ed.exe
    • Size 2.3MB
    • SHA256 5c05c8d9ff8205af0d9b581fdfdc257cc59b6c729fa0d5060a2f48a932675d79
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Family: njRAT/Bladabindi

      Widely used RAT written in .NET.

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Modifies Windows Firewall

    • 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.

    • 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.

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

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

    • Adds Run key to start application

    • 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

MITRE ATT&CK Enterprise v16

Tasks