General

  • Target

    https://cdn.discordapp.com/attachments/1156037908034228304/1301649039971848222/Bootstrapper.exe?ex=67253ea2&is=6723ed22&hm=e8c11c8be3d34d159597bd8d9e91453a76cadac33783c56c6b155c1725a2b43d&

  • Sample

    241031-zsjzwa1rd1

Malware Config

Targets

    • Target

      https://cdn.discordapp.com/attachments/1156037908034228304/1301649039971848222/Bootstrapper.exe?ex=67253ea2&is=6723ed22&hm=e8c11c8be3d34d159597bd8d9e91453a76cadac33783c56c6b155c1725a2b43d&

    • 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.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • 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