Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04-10-2024 12:22

General

  • Target

    main.ps1

  • Size

    1KB

  • MD5

    b5515a7642b1c5853e8771e1571720a8

  • SHA1

    43498ba7615cb2ec69e64d5751f5a8197951d0b1

  • SHA256

    075da88f8a2508f9d1b63d8a1c244731d6314e50298104f27f6228b9dd20fa45

  • SHA512

    1110c1ac7b202d1e1bc29f0e753a0d68d40509e5e2f0cce3062ce7e6f2d315d895cf2b0550c7d7e5b0fd946cb678276985eed2ee425a2d42dac7c2e2b855f51e

Malware Config

Signatures

  • Possible privilege escalation attempt 18 IoCs
  • Modifies file permissions 1 TTPs 18 IoCs
  • Drops file in System32 directory 5 IoCs
  • Drops file in Windows directory 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\main.ps1
    1⤵
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Command and Scripting Interpreter: PowerShell
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2544
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c takeown /F C:\Windows\System32\fr-FR\fms.dll.mui
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1340
      • C:\Windows\system32\takeown.exe
        takeown /F C:\Windows\System32\fr-FR\fms.dll.mui
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        • Suspicious use of AdjustPrivilegeToken
        PID:4860
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c icacls C:\Windows\System32\fr-FR\fms.dll.mui /grant administrators:F
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2156
      • C:\Windows\system32\icacls.exe
        icacls C:\Windows\System32\fr-FR\fms.dll.mui /grant administrators:F
        3⤵
        • Possible privilege escalation attempt
        • Modifies file permissions
        PID:4432
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\explorer.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:4040
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\explorer.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:4424
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\System32\taskmgr.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:4764
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\System32\taskmgr.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:576
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\System32\cmd.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:4640
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\System32\cmd.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:4296
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\regedit.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:1224
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\regedit.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:1512
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\notepad.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:632
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\notepad.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:2536
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\System32\control.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:3932
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\System32\control.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:2500
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\System32\msconfig.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:3464
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\System32\msconfig.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:1504
    • C:\Windows\system32\takeown.exe
      "C:\Windows\system32\takeown.exe" /f C:\Windows\System32\regedt32.exe /a /r /d y
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:2804
    • C:\Windows\system32\icacls.exe
      "C:\Windows\system32\icacls.exe" C:\Windows\System32\regedt32.exe /grant administrators:F /t
      2⤵
      • Possible privilege escalation attempt
      • Modifies file permissions
      PID:1508
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:3056
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      1⤵
      • Modifies registry class
      PID:608

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_22ss0i4e.fj2.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/2544-0-0x00007FFCA4C53000-0x00007FFCA4C55000-memory.dmp

      Filesize

      8KB

    • memory/2544-6-0x000001BE7D8D0000-0x000001BE7D8F2000-memory.dmp

      Filesize

      136KB

    • memory/2544-10-0x00007FFCA4C50000-0x00007FFCA5712000-memory.dmp

      Filesize

      10.8MB

    • memory/2544-11-0x00007FFCA4C50000-0x00007FFCA5712000-memory.dmp

      Filesize

      10.8MB

    • memory/2544-12-0x00007FFCA4C50000-0x00007FFCA5712000-memory.dmp

      Filesize

      10.8MB

    • memory/2544-13-0x00007FFCA4C53000-0x00007FFCA4C55000-memory.dmp

      Filesize

      8KB

    • memory/2544-14-0x00007FFCA4C50000-0x00007FFCA5712000-memory.dmp

      Filesize

      10.8MB