Overview

overview

10

Static

static

10

bcbcc5012b...7a.exe

windows7-x64

10

bcbcc5012b...7a.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 02:33

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General

  • Target
    bcbcc5012bfdd6b885348559bd9523d46eeeac946c8806f5f017332421c4c07a.exe
  • Size 91KB
  • Sample240601-c2afgaeh6t
  • SHA256 bcbcc5012bfdd6b885348559bd9523d46eeeac946c8806f5f017332421c4c07a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
evasionpersistenceupx

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
    persistence
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
    evasion
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
    evasion
  • UPX dump on OEP (original entry point) 18 IoCs
  • Disables RegEdit via registry modification 2 IoCs
    evasion
  • Disables use of System Restore points 1 TTPs
    evasion
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
    persistence
  • UPX packed file 18 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Adds Run key to start application 2 TTPs 5 IoCs
    persistence
  • Drops file in System32 directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Modifies Control Panel 4 IoCs
    evasion
  • Modifies registry class 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • System policy modification 1 TTPs 4 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\bcbcc5012bfdd6b885348559bd9523d46eeeac946c8806f5f017332421c4c07a.exe
    "C:\Users\Admin\AppData\Local\Temp\bcbcc5012bfdd6b885348559bd9523d46eeeac946c8806f5f017332421c4c07a.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies visibility of file extensions in Explorer
    • Modifies visiblity of hidden/system files in Explorer
    • Disables RegEdit via registry modification
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2420
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:3560
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:3580
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:5084
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1704
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:4088
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:4216
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:468

Network

        MITRE ATT&CK Enterprise v15

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        Downloads

        CSRSS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
        • Size 91KB
        • SHA256 66be6320379ddb37f452cec8363e6639dd6b8ade7c5891f00dd4e2ed817a6a5e
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        LSASS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
        • Size 91KB
        • SHA256 4d5070a23d5f7bcfde6ef9f04c84832ef75436fb709f9eb7614110975cf3544a
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        SERVICES.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
        • Size 91KB
        • SHA256 b9591ffb6f573bbf99c923e5367ac18dc074c814a0c19bc00f018871813eda8d
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        SMSS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE
        • Size 91KB
        • SHA256 b0546a08ec12aa64b862116b28f3c93ccdd752a69ed2cd146f1b379ae3d9ed57
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        WINLOGON.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
        • Size 91KB
        • SHA256 4eb9a57ef2a531fb3bb20e9297825c8dad80e80e08b878788c710c1b25b7adfe
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        winlogon.exe
        • Path C:\Users\Admin\AppData\Local\winlogon.exe
        • Size 91KB
        • SHA256 bcbcc5012bfdd6b885348559bd9523d46eeeac946c8806f5f017332421c4c07a
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        IExplorer.exe
        • Path C:\Windows\SysWOW64\IExplorer.exe
        • Size 91KB
        • SHA256 1a9baeec9461a579659d9bd6abbc39331ab7d2bcb4ae8a39533eee1ca92fb433
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        xk.exe
        • Path C:\Windows\xk.exe
        • Size 91KB
        • SHA256 eb24cf25ac1b07cf21de0bf0a5b100174fe41a8c2608c7098d6fc5f5307b25b9
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/468-153-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/1704-134-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2420-155-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2420-0-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3560-113-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3560-108-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3580-121-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/4088-139-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/4216-146-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/5084-125-0x0000000000400000-0x000000000042F000-memory.dmp
        Download