Resubmissions

02/03/2024, 17:29

240302-v2y3yafh788

02/03/2024, 17:24

240302-vysrrafh3810

02/03/2024, 17:22

240302-vxn26sfd2110

Analysis

  • max time kernel
    105s
  • max time network
    141s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/03/2024, 17:24

General

  • Target
    crazyCore.exe
  • Size 15.0MB
  • Sample240302-vysrrafh38
  • SHA256 0d900cb2be48cef95db3dbe86221d8d1007ba294b963ee580c2293c6be37f07a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies Windows Defender notification settings 3 TTPs 2 IoCs
  • Creates new service(s) 1 TTPs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 34 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 9 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\crazyCore.exe
    "C:\Users\Admin\AppData\Local\Temp\crazyCore.exe"
    1⤵
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1160
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c powershell -Command reg add 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender Security Center\Notifications' /v DisableNotifications /t REG_DWORD /d 1 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1440
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command reg add 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender Security Center\Notifications' /v DisableNotifications /t REG_DWORD /d 1 /f
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1136
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender Security Center\Notifications" /v DisableNotifications /t REG_DWORD /d 1 /f
          4⤵
          • Modifies Windows Defender notification settings
          PID:1868
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c mkdir \\.\C:\ProgramData\Nul & attrib +r +h +s \\.\C:\ProgramData\Nul & powershell -Command Add-MpPreference -ExclusionPath @('C:\ProgramData', 'C:\Windows\system32\svchost.exe') -ExclusionExtension '.exe'
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4100
      • C:\Windows\system32\attrib.exe
        attrib +r +h +s \\.\C:\ProgramData\Nul
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4568
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command Add-MpPreference -ExclusionPath @('C:\ProgramData', 'C:\Windows\system32\svchost.exe') -ExclusionExtension '.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4660
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c sc create "nulhost" binpath="C:\ProgramData\Nul\nulhost.exe" start="auto"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4220
      • C:\Windows\system32\sc.exe
        sc create "nulhost" binpath="C:\ProgramData\Nul\nulhost.exe" start="auto"
        3⤵
        • Launches sc.exe
        PID:1748
  • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\These.docx" /o ""
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2472
  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\ResolveFormat.vbe"
    1⤵
      PID:3568

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 1bdc4f0e8c0845ba527337f1e791da5873c34dff15eb33c71a5aba89e4db4c80
          • MD5 SHA1 SHA512

          __PSScriptPolicyTest_wecmk2u0.tjk.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wecmk2u0.tjk.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          index.dat

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat
          • Size 202B
          • SHA256 fe33f57205e2ebb981c4744d5a4ddc231f587a9a0589e6565c52e1051eadb0c0
          • MD5 SHA1 SHA512

          memory/1136-20-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/1136-28-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/1136-21-0x000001C3A1270000-0x000001C3A1280000-memory.dmp

          memory/1136-19-0x000001C3A1210000-0x000001C3A1232000-memory.dmp

          memory/1160-12-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-5-0x000001FA59550000-0x000001FA59558000-memory.dmp

          memory/1160-10-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-11-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/1160-42-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-13-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-8-0x000001FA71E40000-0x000001FA71E4E000-memory.dmp

          memory/1160-7-0x000001FA71FF0000-0x000001FA72028000-memory.dmp

          memory/1160-6-0x000001FA59540000-0x000001FA5954A000-memory.dmp

          memory/1160-9-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-25-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-4-0x000001FA71E80000-0x000001FA71EC0000-memory.dmp

          memory/1160-3-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-2-0x000001FA72090000-0x000001FA720A0000-memory.dmp

          memory/1160-0-0x000001FA56940000-0x000001FA57842000-memory.dmp

          memory/1160-49-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/1160-1-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/2472-50-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-64-0x00007FFB53E50000-0x00007FFB53E60000-memory.dmp

          memory/2472-111-0x00007FFB94FE0000-0x00007FFB9509D000-memory.dmp

          memory/2472-110-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-109-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-52-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-54-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-56-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-55-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-58-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-57-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-59-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-60-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-53-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-51-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-61-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-62-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-108-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-63-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-65-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-67-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-66-0x00007FFB53E50000-0x00007FFB53E60000-memory.dmp

          memory/2472-69-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-70-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-68-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-72-0x00007FFB96180000-0x00007FFB96389000-memory.dmp

          memory/2472-73-0x00007FFB94FE0000-0x00007FFB9509D000-memory.dmp

          memory/2472-107-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/2472-106-0x00007FFB56210000-0x00007FFB56220000-memory.dmp

          memory/4660-38-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp

          memory/4660-43-0x0000020663080000-0x0000020663090000-memory.dmp

          memory/4660-39-0x0000020663080000-0x0000020663090000-memory.dmp

          memory/4660-41-0x0000020663080000-0x0000020663090000-memory.dmp

          memory/4660-45-0x00007FFB75000000-0x00007FFB75AC2000-memory.dmp