Resubmissions

24-06-2024 15:13

240624-slt3yasbrl 9

24-06-2024 15:12

240624-sk93rssbpj 7

General

  • Target

    SolaraB2.zip

  • Size

    278KB

  • Sample

    240624-slt3yasbrl

  • MD5

    ea418b261e24a56105a6d328b60e9cc7

  • SHA1

    4f89568a40fff23b381eb1009a764cc7eaf6580c

  • SHA256

    da9098d4713d46c44b95758bdf17e3d2fa1633b3130c7be47b7111132dc051ff

  • SHA512

    95a04802ae713e00940b6ddb55bc75ea7d3450cf31b5fb9d55f0b44aa3629bbf2695d979e1cdef244b4df987db89475cb7185f648cdaffbaa8189e3187dcc8de

  • SSDEEP

    6144:eZJBeDFmH5elET2OhI16sf2YtiQFhL+SV0zZ5NnFJw:IJkFmH36h6seLQFhwfw

Malware Config

Targets

    • Target

      SolaraB2/Solara/SolaraBootstrapper.exe

    • Size

      797KB

    • MD5

      36b62ba7d1b5e149a2c297f11e0417ee

    • SHA1

      ce1b828476274375e632542c4842a6b002955603

    • SHA256

      8353c5ace62fda6aba330fb3396e4aab11d7e0476f815666bd96a978724b9e0c

    • SHA512

      fddec44631e7a800abf232648bbf417969cd5cc650f32c17b0cdc12a0a2afeb9a5dbf5c1f899bd2fa496bd22307bfc8d1237c94920fceafd84f47e13a6b98b94

    • SSDEEP

      12288:n1mzgHpbzEu8AgpQojA1j855xU9pHIRxSNN:1mzgH385QojA1j855xSHI

    • 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