Extracted

• • Target

    4f9daccbc02a2fa0bcc5149af49dcef672fdf2683e9f5ab471a0aa633c386a27

  • Size

    1.8MB

  • MD5

    29e83eb08c474cf1a86c910cb09ddf68

  • SHA1

    3ff2d663dfd76dbeed99deb4136f1ec5f924e94f

  • SHA256

    4f9daccbc02a2fa0bcc5149af49dcef672fdf2683e9f5ab471a0aa633c386a27

  • SHA512

    bda8b5501954758dd3357124041aa1e66eda227181c47830b617d41097b1f4ba87733b1a4314726ebc952c94b25c9b07cacb10eb271e70c07b09265dd3a45bd3

  Score

  10^/10

  buerevasionloaderpersistence

  • Buer

    Buer is a new modular loader first seen in August 2019.

    loaderbuer

  • Modifies WinLogon for persistence

    persistence

  • Buer Loader

    Detects Buer loader in memory or disk.

    loader

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

    evasion

  • Executes dropped EXE

  • Checks BIOS information in registry

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

  • Deletes itself

  • Identifies Wine through registry keys

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion

  • Loads dropped DLL

  • Suspicious use of NtSetInformationThreadHideFromDebugger

  behavioral1behavioral2