General

  • Target

    https://softwareupdate.vmware.com/cds/vmw-desktop/player/17.5.2/23775571/windows/core/

  • Sample

    240526-xeerwsgg28

Malware Config

Targets

    • Target

      https://softwareupdate.vmware.com/cds/vmw-desktop/player/17.5.2/23775571/windows/core/

    • Drops file in Drivers directory

    • Looks for VMWare Tools registry key

    • Looks for VMWare drivers on disk

    • Looks for VMWare services registry key.

    • Sets service image path in registry

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

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

    • Mark of the Web detected: This indicates that the page was originally saved or cloned.

    • 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 v15

Tasks