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General

  • Target

    Bootstrapper.exe

  • Size

    797KB

  • Sample

    240725-21qhqstdrg

  • MD5

    86bf094b70901e55a281e0a0683dd8b3

  • SHA1

    24afc916d186facaf7885363bf335e3e5b7d69b9

  • SHA256

    2a4255d739e42838d49159d7228952b512a2c8ccb6f4b0c8d35543912130dac6

  • SHA512

    2f33349c13f7778869f4e200380acd9c12e41a981a30005ad01aa8c29442d9bfdfb2a76a1b589be1efb2e4a314cbdf92f691a12b0fa487af4160e7d87ff25e56

  • SSDEEP

    12288:e/+ubxKHJg5bbEjlsqRoAQpjFVfG0c4XqCon9hUpVo34u:Q+ubYHYqRoAQpjFVG0HXqlF4u

Malware Config

Targets

    • Target

      Bootstrapper.exe

    • Size

      797KB

    • MD5

      86bf094b70901e55a281e0a0683dd8b3

    • SHA1

      24afc916d186facaf7885363bf335e3e5b7d69b9

    • SHA256

      2a4255d739e42838d49159d7228952b512a2c8ccb6f4b0c8d35543912130dac6

    • SHA512

      2f33349c13f7778869f4e200380acd9c12e41a981a30005ad01aa8c29442d9bfdfb2a76a1b589be1efb2e4a314cbdf92f691a12b0fa487af4160e7d87ff25e56

    • SSDEEP

      12288:e/+ubxKHJg5bbEjlsqRoAQpjFVfG0c4XqCon9hUpVo34u:Q+ubYHYqRoAQpjFVG0HXqlF4u

    • 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 installed software on the system

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

    • 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