Overview

overview

10

Static

static

Notice_Deliv_1.xlsm

windows7_x64

10

Notice_Deliv_1.xlsm

windows10_x64

10

Analysis

  • max time kernel
    138s
  • max time network
    135s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11/12/2020, 07:13

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General

  • Target
    Notice_Deliv_1.xlsm
  • Size 430KB
  • Sample201211-4y7sxhsd7j
  • SHA256 553cdc00fc3f98f0aa58936a890cd45cce84cb9ddaeee647459a98a32c2e219d
  • MD5 SHA1 SHA512
Score
10/10
buerloader

Malware Config

Extracted

Family

  • buer

C2

  • heartprogseds.com

Signatures

  • Buer

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

    loaderbuer
  • Buer Loader 3 IoCs

    Detects Buer loader in memory or disk.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • NSIS installer 6 IoCs
    installer
  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Notice_Deliv_1.xlsm"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:648
    • C:\offic\offiekra\MSettingExcel.exe
      "C:\offic\offiekra\MSettingExcel.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2452
      • C:\offic\offiekra\MSettingExcel.exe
        "C:\offic\offiekra\MSettingExcel.exe"
        3⤵
        • Executes dropped EXE
        PID:3184

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/648-2-0x00007FF91E6D0000-0x00007FF91ED07000-memory.dmp
        Download

        memory/3184-7-0x0000000040000000-0x0000000040009000-memory.dmp
        Download

        memory/3184-10-0x0000000040000000-0x0000000040009000-memory.dmp
        Download