Overview

overview

10

Static

static

10

da285a3fd1...e1.exe

windows7-x64

10

da285a3fd1...e1.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    93s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 04:27

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General

  • Target
    da285a3fd1f4bcb67362a2b7c033aee2e83214073d33f3c607966f6f031941e1.exe
  • Size 90KB
  • Sample240603-e3g8tabc7z
  • SHA256 da285a3fd1f4bcb67362a2b7c033aee2e83214073d33f3c607966f6f031941e1
  • 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\da285a3fd1f4bcb67362a2b7c033aee2e83214073d33f3c607966f6f031941e1.exe
    "C:\Users\Admin\AppData\Local\Temp\da285a3fd1f4bcb67362a2b7c033aee2e83214073d33f3c607966f6f031941e1.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:3352
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2184
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:3528
    • 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:4564
    • 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:2944
    • 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:2732
    • 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:2428
    • 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:4832

Network

        MITRE ATT&CK Enterprise v15

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        Downloads

        CSRSS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
        • Size 90KB
        • SHA256 1a99935c70381b270b8504ed86fb81da8f68eed73a4b40d34eaa1d019d27920b
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        LSASS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
        • Size 90KB
        • SHA256 93ec6008a90564f98a90468ea7aa377a7ab46530d0a320b1b2ffe1db0c845fbd
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        SERVICES.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
        • Size 90KB
        • SHA256 8d12f63bebaa629598fb10f140a5cb4701f69b386f92f836eb9c9ed23464e961
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        SMSS.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE
        • Size 90KB
        • SHA256 7d199244fec70a849e22e816a83188a8ca1715aa9d8a288efbd86e17751325be
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        WINLOGON.EXE
        • Path C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
        • Size 90KB
        • SHA256 6f9ffe4b614af426933e536783d1564ea5fc7c54dc729707eccd4782888af7eb
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        winlogon.exe
        • Path C:\Users\Admin\AppData\Local\winlogon.exe
        • Size 90KB
        • SHA256 da285a3fd1f4bcb67362a2b7c033aee2e83214073d33f3c607966f6f031941e1
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        IExplorer.exe
        • Path C:\Windows\SysWOW64\IExplorer.exe
        • Size 90KB
        • SHA256 ec298fb919ce699c2e12a305cbde409f1348d874ab912546c63124fcc15f6451
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        xk.exe
        • Path C:\Windows\xk.exe
        • Size 90KB
        • SHA256 4e4b1088f5ea3f927399d0234a5f811b2af8ac9e2a98923c5374a00ad0647eca
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/2184-108-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2184-112-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2428-144-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2732-138-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/2944-132-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3352-0-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3352-152-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/3528-119-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/4564-125-0x0000000000400000-0x000000000042F000-memory.dmp
        Download

        memory/4832-150-0x0000000000400000-0x000000000042F000-memory.dmp
        Download