Overview

overview

10

Static

static

3c1a487926...03.exe

windows7_x64

10

3c1a487926...03.exe

windows10-2004_x64

10

Sharing

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General

  • Target
    3c1a487926e726fda53c8d5e2a6f455fb6a7a5de3758925d9250c95c17b19203
  • Size 1.8MB
  • Sample220625-ne6e6saahl
  • SHA256 3c1a487926e726fda53c8d5e2a6f455fb6a7a5de3758925d9250c95c17b19203
  • MD5 SHA1 SHA512
Score
10/10
buerevasionloaderpersistence

Malware Config

Extracted

Family

  • buer

C2

  • http://loy01.top/

  • http://loy02.top/

  • cook5**gjt+,)ojk*

  • cook5**gjt+-)ojk*

Targets

    • Target
      3c1a487926e726fda53c8d5e2a6f455fb6a7a5de3758925d9250c95c17b19203
    • Size 1.8MB
    • SHA256 3c1a487926e726fda53c8d5e2a6f455fb6a7a5de3758925d9250c95c17b19203
    • MD5 SHA1 SHA512
    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

MITRE ATT&CK Enterprise v6

Tasks