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Analysis

  • max time kernel
    144s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2023, 09:15

General

  • Target

    Quotation_pdf.exe

  • Size

    910KB

  • MD5

    6be7360d15864b39760f38be37d21b32

  • SHA1

    9a85a30228996405f11807cbbf8d9cd7e47d45cc

  • SHA256

    0f71aedb95163de525fa395b1a444f48222bc28b70521bff45467cbf98b63b9a

  • SHA512

    b98ad8f32c4632c403466e27161518c991b6c9395da27a743bc3af6ca2a7c632b595ce44fd7d09c6603212cdab9dcb220db76f80399719f7097451a8190f2a0e

  • SSDEEP

    24576:S0PXkGzgCC4mEIXxiZiX6vjgxxUtqY6VUOP:DPng74mJxmiX6vjgEb2

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5450700540:AAEJyEEV8BKgYUKmnCPZxp19kD9GVSRup5M/sendMessage?chat_id=5422342474

Signatures

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4680
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        3⤵
        • Accesses Microsoft Outlook profiles
        • outlook_office_path
        • outlook_win_path
        PID:4704

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/2072-139-0x0000000005490000-0x00000000054A0000-memory.dmp

    Filesize

    64KB

  • memory/2072-134-0x0000000005BF0000-0x0000000006194000-memory.dmp

    Filesize

    5.6MB

  • memory/2072-135-0x0000000005720000-0x00000000057B2000-memory.dmp

    Filesize

    584KB

  • memory/2072-136-0x0000000005490000-0x00000000054A0000-memory.dmp

    Filesize

    64KB

  • memory/2072-137-0x0000000005490000-0x00000000054A0000-memory.dmp

    Filesize

    64KB

  • memory/2072-138-0x0000000005490000-0x00000000054A0000-memory.dmp

    Filesize

    64KB

  • memory/2072-133-0x0000000000AC0000-0x0000000000BAA000-memory.dmp

    Filesize

    936KB

  • memory/2072-140-0x00000000095D0000-0x000000000966C000-memory.dmp

    Filesize

    624KB

  • memory/4680-141-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB

  • memory/4680-144-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB

  • memory/4680-147-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB

  • memory/4680-159-0x0000000000400000-0x000000000046E000-memory.dmp

    Filesize

    440KB

  • memory/4704-148-0x0000000000540000-0x00000000005A6000-memory.dmp

    Filesize

    408KB