Analysis

  • max time kernel
    8s
  • 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 12:25

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.

  • 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:1560
    • 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:4804
      • 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:3960
    • 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:3320
      • 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:4368
    • 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:3532
    • 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:4972
    • 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:4584
    • 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:3440
    • 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:1656
    • 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:2536
    • 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:2756
    • 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:2828
    • 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:2260
    • 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:4216
    • 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:2960
    • 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:2200
    • 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:1616
    • 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:5404
    • 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:1192
    • 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:3316

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_a5exvhkl.llm.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1560-0-0x00007FF9E2713000-0x00007FF9E2715000-memory.dmp

    Filesize

    8KB

  • memory/1560-1-0x000002A4A7E90000-0x000002A4A7EB2000-memory.dmp

    Filesize

    136KB

  • memory/1560-10-0x00007FF9E2710000-0x00007FF9E31D2000-memory.dmp

    Filesize

    10.8MB

  • memory/1560-11-0x00007FF9E2710000-0x00007FF9E31D2000-memory.dmp

    Filesize

    10.8MB

  • memory/1560-12-0x00007FF9E2710000-0x00007FF9E31D2000-memory.dmp

    Filesize

    10.8MB

  • memory/1560-13-0x00007FF9E2713000-0x00007FF9E2715000-memory.dmp

    Filesize

    8KB

  • memory/1560-14-0x00007FF9E2710000-0x00007FF9E31D2000-memory.dmp

    Filesize

    10.8MB