General

  • Target

    SolaraBootstrapper.exe

  • Size

    798KB

  • Sample

    240620-r2x9vsxbjr

  • MD5

    7416a188b82e9dc4b020a59d3c9267d5

  • SHA1

    15b67c0e13667dd00f2f1d1d2d3132e629e746f3

  • SHA256

    6a6990c2da4da8f8870da3e33865a1dff8f16874793b232971194c074f3b7838

  • SHA512

    3f2616216e8dc70362cc6d3f8e76a009108fe04d98697a744c131b76f3c693364ef2a80716ccd9a8f9987d2ac10b0316b0328a0066260055fcbadcd449aaf704

  • SSDEEP

    12288:pfSmzhHoAX5TyQvgwRojAojGdJaTGLLvlguxD:smzhHWQDRojAojGddLL

Malware Config

Targets

    • Target

      SolaraBootstrapper.exe

    • Size

      798KB

    • MD5

      7416a188b82e9dc4b020a59d3c9267d5

    • SHA1

      15b67c0e13667dd00f2f1d1d2d3132e629e746f3

    • SHA256

      6a6990c2da4da8f8870da3e33865a1dff8f16874793b232971194c074f3b7838

    • SHA512

      3f2616216e8dc70362cc6d3f8e76a009108fe04d98697a744c131b76f3c693364ef2a80716ccd9a8f9987d2ac10b0316b0328a0066260055fcbadcd449aaf704

    • SSDEEP

      12288:pfSmzhHoAX5TyQvgwRojAojGdJaTGLLvlguxD:smzhHWQDRojAojGddLL

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

    • Downloads MZ/PE file

    • Event Triggered Execution: Image File Execution Options Injection

    • 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.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • 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

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks