Resubmissions

07/08/2024, 01:33

240807-byvfssxblk 8

07/08/2024, 01:25

240807-bs2mxszglb 9

General

  • Target

    https://solaraweb.vercel.app/download/executable/Bootstrapper.exe

  • Sample

    240807-bs2mxszglb

Malware Config

Targets

    • Target

      https://solaraweb.vercel.app/download/executable/Bootstrapper.exe

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • 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

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Blocklisted process makes network request

    • Checks whether UAC is enabled

    • 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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks