Overview

overview

10

Static

static

796e1936b0...a6.exe

windows7_x64

10

796e1936b0...a6.exe

windows10-2004_x64

10

Sharing

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General

  • Target
    796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6
  • Size 1.7MB
  • Sample220625-jzxljsefb5
  • SHA256 796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6
  • MD5 SHA1 SHA512
Score
10/10
buerevasionloaderpersistence

Malware Config

Extracted

Family

  • buer

C2

  • http://lodddd01.info/

  • http://lodddd02.info/

  • cook5**gj____+,)diaj*

  • cook5**gj____+-)diaj*

Targets

    • Target
      796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6
    • Size 1.7MB
    • SHA256 796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6
    • 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