Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 18:59

General

  • Target
    15bfc5842a3351a58cf7daf354e3511da873e44b8c7e26ec95705aa8c5a9662e.exe
  • Size 164KB
  • Sample240526-xnavashb94
  • SHA256 15bfc5842a3351a58cf7daf354e3511da873e44b8c7e26ec95705aa8c5a9662e
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Modifies Control Panel 4 IoCs
  • 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\15bfc5842a3351a58cf7daf354e3511da873e44b8c7e26ec95705aa8c5a9662e.exe
    "C:\Users\Admin\AppData\Local\Temp\15bfc5842a3351a58cf7daf354e3511da873e44b8c7e26ec95705aa8c5a9662e.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:4768
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:4384
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1792
    • 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:1332
    • 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:1072
    • 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:4616
    • 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:1292
    • 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:2020

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        CSRSS.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
        • Size 164KB
        • SHA256 24c74f23426dd35ac7447469037514bb63d43b585b117c9cf0081b0c66253dc1
        • MD5 SHA1 SHA512 SSDEEP

        LSASS.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
        • Size 164KB
        • SHA256 aba5fa3f543945446c03a3dc08b8026c83c7ac9f87dff9c9fe48cb57b22c90b7
        • MD5 SHA1 SHA512 SSDEEP

        SERVICES.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
        • Size 164KB
        • SHA256 4ae4974e08bb20db80e6dc9356b0dedc30e187a7b73774ba62455abab40643c8
        • MD5 SHA1 SHA512 SSDEEP

        SMSS.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE
        • Size 164KB
        • SHA256 d5741651cf08f012c88c407a48c1a3d92f4027fcab0a972aea2dad53759bccaf
        • MD5 SHA1 SHA512 SSDEEP

        WINLOGON.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
        • Size 164KB
        • SHA256 f71fb31b8046c8903ec9a90046d3c83640c5717c1d6593ac1f2a22f6e1f89674
        • MD5 SHA1 SHA512 SSDEEP

        winlogon.exe

        • Path C:\Users\Admin\AppData\Local\winlogon.exe
        • Size 164KB
        • SHA256 15bfc5842a3351a58cf7daf354e3511da873e44b8c7e26ec95705aa8c5a9662e
        • MD5 SHA1 SHA512 SSDEEP

        IExplorer.exe

        • Path C:\Windows\SysWOW64\IExplorer.exe
        • Size 164KB
        • SHA256 65b44bc0de89d8bbd2ccae8f4824ed5f0ecec7e8629a76859acbdab81cdf810f
        • MD5 SHA1 SHA512 SSDEEP

        xk.exe

        • Path C:\Windows\xk.exe
        • Size 164KB
        • SHA256 4de8a90c8a1714671104a1fb0baeb0255a9f46cfd7a10a70c0a9d787500ac99c
        • MD5 SHA1 SHA512 SSDEEP