Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 13:30

General

  • Target
    3385b5b2dbf291f71799fecb76f6562d01e99422deb29730b47710d1b22e0536.exe
  • Size 91KB
  • Sample240522-qrr5esdb55
  • SHA256 3385b5b2dbf291f71799fecb76f6562d01e99422deb29730b47710d1b22e0536
  • 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\3385b5b2dbf291f71799fecb76f6562d01e99422deb29730b47710d1b22e0536.exe
    "C:\Users\Admin\AppData\Local\Temp\3385b5b2dbf291f71799fecb76f6562d01e99422deb29730b47710d1b22e0536.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:3820
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1240
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:4564
    • 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:1972
    • 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:2980
    • 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:4100
    • 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:4644
    • 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:4432

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        LSASS.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
        • Size 91KB
        • SHA256 de1264aee058fe3e70355dbfbeb2208614f5fe8e831281a8671d3987533b773b
        • MD5 SHA1 SHA512 SSDEEP

        SERVICES.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
        • Size 91KB
        • SHA256 a5233abbb6c6f2a779e3e1261cd1d1828423aaae068955e6ee51455e1be922a4
        • MD5 SHA1 SHA512 SSDEEP

        WINLOGON.EXE

        • Path C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
        • Size 91KB
        • SHA256 e41c47a8834ecbb33600222078b637af4b94d448fe4d1529425be9a17729e21e
        • MD5 SHA1 SHA512 SSDEEP

        winlogon.exe

        • Path C:\Users\Admin\AppData\Local\winlogon.exe
        • Size 91KB
        • SHA256 3385b5b2dbf291f71799fecb76f6562d01e99422deb29730b47710d1b22e0536
        • MD5 SHA1 SHA512 SSDEEP

        CSRSS.EXE

        • Path C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
        • Size 91KB
        • SHA256 4f21d82570b73ad17f9ef7d32833b68c06bb4ba9f70ddb9010bdbccb786fbbd9
        • MD5 SHA1 SHA512 SSDEEP

        SMSS.EXE

        • Path C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
        • Size 91KB
        • SHA256 5d177e622d28ec97fbf07668d1e5ce90f54d4dd879e00b736285e409d6e674d3
        • MD5 SHA1 SHA512 SSDEEP

        IExplorer.exe

        • Path C:\Windows\SysWOW64\IExplorer.exe
        • Size 91KB
        • SHA256 a1db587982e21ab2b9bbbc49e99677e331037dc6429f8ee7985c50c0991153b4
        • MD5 SHA1 SHA512 SSDEEP

        xk.exe

        • Path C:\Windows\xk.exe
        • Size 91KB
        • SHA256 dd401015db64dd8562457785f895544c55cf5ac9a868815c88536ef156cd43cb
        • MD5 SHA1 SHA512 SSDEEP

        memory/1240-110-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/1972-126-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/2980-128-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/2980-132-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/3820-0-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/3820-152-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/4100-138-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/4432-150-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/4564-119-0x0000000000400000-0x000000000042E000-memory.dmp

        memory/4644-144-0x0000000000400000-0x000000000042E000-memory.dmp