General

  • Target

    SolaraB2 (1).zip

  • Size

    279KB

  • Sample

    240615-lxyf6szdkq

  • MD5

    bf72c7f0929c3e61b6e43eadcdea0e63

  • SHA1

    a62e31ab77aad711f583e6ef7557aba22ba16f07

  • SHA256

    df4e6521df02bc5d192fe56f93c730ff9dd7cd28f6d39b0953fdc44308ef7f27

  • SHA512

    a10928feb07969e2a7d463259baa5937a3eedb629b210ab5ea72b079f178c46a32cd39d7ab0a25b455a2bcc464e067f73ab3d718a3771f2d5efd196723f039eb

  • SSDEEP

    6144:Vyz+oHOzk5fK2+rpyfh+2nfezLycnt1Laxe2guZHyHsJNSm83vi/1tQA8n:VfouY5fv+A+2n21LuRFR4izQbn

Malware Config

Targets

    • Target

      SolaraB2/SolaraBootstrapper.exe

    • Size

      798KB

    • MD5

      baa81d6b98890ac06befe560d00be992

    • SHA1

      b69769c15af3ff85ca16a4ee579ea7fd959179e9

    • SHA256

      ec710ba066a78e3faf19b9d9a589ace5540a6a31551dc977b533e7d67352f87b

    • SHA512

      ded06cff210a201a53670ab55078c4edfcc0c4137af04b1ad3966b69464ec717957508b341d5f5fef485679bdd841017c420a14217d9480181a03fcd9aaad7f1

    • SSDEEP

      12288:PZZmz3HwnXFZ9RgoOojAojAbJaTGLLvlguxD:3mz3Hi9tOojAojAbdLL

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

    • Downloads MZ/PE file

    • Sets file execution options in registry

    • 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

    • Registers COM server for autorun

    • 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