Analysis

  • max time kernel
    95s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2024 13:38

General

  • Target

    A26ED7DC21BC77F20C0251FA25738D02.exe

  • Size

    2.5MB

  • MD5

    a26ed7dc21bc77f20c0251fa25738d02

  • SHA1

    8fc82929941d67a20c76976e796feab701795c2f

  • SHA256

    18e83d9fabe142a751c644f12d223e6c4825912573a352551361abde977d753f

  • SHA512

    5e8044fd8e78aad306d8ffd3b3bbc6583cc353c8cddda1a15b05a22fcf7815a770482418bdb120c679f784017741e36c87aa5bb053008cc94fe9560b97366838

  • SSDEEP

    24576:eRDNakc4BcCw7sUL/4cIG5IuUe1QdcqTHmdbBs3eJCZrCsjOEKka+wlFlett6t1:yDNu4BaMcQmQmqyHM6sslnE

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • DCRat payload 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 22 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 12 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 52 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\A26ED7DC21BC77F20C0251FA25738D02.exe
    "C:\Users\Admin\AppData\Local\Temp\A26ED7DC21BC77F20C0251FA25738D02.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:1548
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:3972
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:3696
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:1300
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2980
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2040
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2552
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:960
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2440
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:2480
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:3588
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\8j7qddDKhy.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4620
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4140
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          3⤵
            PID:4380
          • C:\Users\Admin\powershell.exe
            "C:\Users\Admin\powershell.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3940
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1052
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:2920
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:4728
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1688
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:2020
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:3584
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1780
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1748
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1784
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:4016
            • C:\Users\Admin\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:4908

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Program Files (x86)\WindowsPowerShell\unsecapp.exe

        Filesize

        2.5MB

        MD5

        a26ed7dc21bc77f20c0251fa25738d02

        SHA1

        8fc82929941d67a20c76976e796feab701795c2f

        SHA256

        18e83d9fabe142a751c644f12d223e6c4825912573a352551361abde977d753f

        SHA512

        5e8044fd8e78aad306d8ffd3b3bbc6583cc353c8cddda1a15b05a22fcf7815a770482418bdb120c679f784017741e36c87aa5bb053008cc94fe9560b97366838

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        d85ba6ff808d9e5444a4b369f5bc2730

        SHA1

        31aa9d96590fff6981b315e0b391b575e4c0804a

        SHA256

        84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

        SHA512

        8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        944B

        MD5

        d28a889fd956d5cb3accfbaf1143eb6f

        SHA1

        157ba54b365341f8ff06707d996b3635da8446f7

        SHA256

        21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

        SHA512

        0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        944B

        MD5

        59d97011e091004eaffb9816aa0b9abd

        SHA1

        1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

        SHA256

        18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

        SHA512

        d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        944B

        MD5

        3a6bad9528f8e23fb5c77fbd81fa28e8

        SHA1

        f127317c3bc6407f536c0f0600dcbcf1aabfba36

        SHA256

        986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

        SHA512

        846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        944B

        MD5

        6c47b3f4e68eebd47e9332eebfd2dd4e

        SHA1

        67f0b143336d7db7b281ed3de5e877fa87261834

        SHA256

        8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

        SHA512

        0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

      • C:\Users\Admin\AppData\Local\Temp\8j7qddDKhy.bat

        Filesize

        205B

        MD5

        2bb32b1ac3eacd124e1d6a2514bcbe25

        SHA1

        b0544de27f4058df1e2894691054ab30dce8841d

        SHA256

        c4892ac00e3d64718016a3924eefe87d7b7d77c41ab34692eef17011ddc98f7c

        SHA512

        12a921de77d3ba2676d6b7a9e54a1f629c1a99ade9cd1265025181b150020e4b926f45161e807d91f4a4bc4483dd25d89cdf1b12439db09e0bc47a240532121a

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_be4ufeef.fia.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1548-82-0x000002A9DDA70000-0x000002A9DDA92000-memory.dmp

        Filesize

        136KB

      • memory/2696-39-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-40-0x000000001BE40000-0x000000001C368000-memory.dmp

        Filesize

        5.2MB

      • memory/2696-17-0x0000000002BD0000-0x0000000002BE0000-memory.dmp

        Filesize

        64KB

      • memory/2696-18-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-20-0x0000000002D90000-0x0000000002DA0000-memory.dmp

        Filesize

        64KB

      • memory/2696-25-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-27-0x000000001B740000-0x000000001B74C000-memory.dmp

        Filesize

        48KB

      • memory/2696-29-0x000000001B770000-0x000000001B782000-memory.dmp

        Filesize

        72KB

      • memory/2696-31-0x000000001B750000-0x000000001B75C000-memory.dmp

        Filesize

        48KB

      • memory/2696-24-0x0000000002DD0000-0x0000000002DDE000-memory.dmp

        Filesize

        56KB

      • memory/2696-33-0x000000001B760000-0x000000001B770000-memory.dmp

        Filesize

        64KB

      • memory/2696-22-0x0000000002DA0000-0x0000000002DAE000-memory.dmp

        Filesize

        56KB

      • memory/2696-36-0x000000001B8D0000-0x000000001B8E6000-memory.dmp

        Filesize

        88KB

      • memory/2696-38-0x000000001B8F0000-0x000000001B902000-memory.dmp

        Filesize

        72KB

      • memory/2696-34-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-0-0x00007FF8563B3000-0x00007FF8563B5000-memory.dmp

        Filesize

        8KB

      • memory/2696-42-0x000000001B790000-0x000000001B79E000-memory.dmp

        Filesize

        56KB

      • memory/2696-44-0x000000001B8B0000-0x000000001B8C0000-memory.dmp

        Filesize

        64KB

      • memory/2696-45-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-15-0x0000000002DB0000-0x0000000002DC8000-memory.dmp

        Filesize

        96KB

      • memory/2696-47-0x000000001B8C0000-0x000000001B8D0000-memory.dmp

        Filesize

        64KB

      • memory/2696-50-0x000000001B970000-0x000000001B9CA000-memory.dmp

        Filesize

        360KB

      • memory/2696-48-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-52-0x000000001B910000-0x000000001B91E000-memory.dmp

        Filesize

        56KB

      • memory/2696-54-0x000000001B920000-0x000000001B930000-memory.dmp

        Filesize

        64KB

      • memory/2696-56-0x000000001B930000-0x000000001B93E000-memory.dmp

        Filesize

        56KB

      • memory/2696-58-0x000000001B9D0000-0x000000001B9E8000-memory.dmp

        Filesize

        96KB

      • memory/2696-60-0x000000001B940000-0x000000001B94C000-memory.dmp

        Filesize

        48KB

      • memory/2696-62-0x000000001BA40000-0x000000001BA8E000-memory.dmp

        Filesize

        312KB

      • memory/2696-13-0x0000000002B90000-0x0000000002BA0000-memory.dmp

        Filesize

        64KB

      • memory/2696-11-0x000000001B6B0000-0x000000001B700000-memory.dmp

        Filesize

        320KB

      • memory/2696-10-0x0000000002D70000-0x0000000002D8C000-memory.dmp

        Filesize

        112KB

      • memory/2696-147-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-9-0x0000000002D20000-0x0000000002D3C000-memory.dmp

        Filesize

        112KB

      • memory/2696-7-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-6-0x0000000002B80000-0x0000000002B8E000-memory.dmp

        Filesize

        56KB

      • memory/2696-4-0x0000000002BA0000-0x0000000002BC6000-memory.dmp

        Filesize

        152KB

      • memory/2696-2-0x00007FF8563B0000-0x00007FF856E71000-memory.dmp

        Filesize

        10.8MB

      • memory/2696-1-0x0000000000780000-0x0000000000A12000-memory.dmp

        Filesize

        2.6MB