General

  • Target

    Bootstrapper.exe

  • Size

    800KB

  • Sample

    241113-h2mnpaxfkp

  • MD5

    2a4dcf20b82896be94eb538260c5fb93

  • SHA1

    21f232c2fd8132f8677e53258562ad98b455e679

  • SHA256

    ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

  • SHA512

    4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

  • SSDEEP

    12288:t0zVvgDNMoWjTmFzAzBocaKjyWtiR1pptHxQ0z:O5vgHWjTwAlocaKjyyItHDz

Malware Config

Targets

    • Target

      Bootstrapper.exe

    • Size

      800KB

    • MD5

      2a4dcf20b82896be94eb538260c5fb93

    • SHA1

      21f232c2fd8132f8677e53258562ad98b455e679

    • SHA256

      ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

    • SHA512

      4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

    • SSDEEP

      12288:t0zVvgDNMoWjTmFzAzBocaKjyWtiR1pptHxQ0z:O5vgHWjTwAlocaKjyyItHDz

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

    • Downloads MZ/PE file

    • A potential corporate email address has been identified in the URL: [email protected]

    • Checks BIOS information in registry

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

    • 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

    • Network Share Discovery

      Attempt to gather information on host network.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks