Analysis

  • max time kernel
    102s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/03/2025, 06:17

General

  • Target

    d7508b07903325957294ebdcb89bd5b3.exe

  • Size

    1.1MB

  • MD5

    d7508b07903325957294ebdcb89bd5b3

  • SHA1

    b6280b6c5e4b601ba3182520eca834aecd1ae1fc

  • SHA256

    4fe2546f5efe48febc2db59093ceef7b1c3db73e3b11ba026bfd8c4444b2af8e

  • SHA512

    e79cd38b556481bd3da6fcde5e924c2c0161a7e26ba635d02f393a424cf675b63e61948c7162abc06c487ae661ff431062236327be9b68be90e6ace7bfd23808

  • SSDEEP

    12288:p49I/nL8TnKZPVHR3E/bS2vkRNJLXseJQdErvNKj6SKm+eAIhu181d6rsPH:pngTKZ5RU/xG7zsEyEve6SZ+dIe8usv

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Process spawned unexpected child process 6 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 7 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 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in System32 directory 5 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • System policy modification 1 TTPs 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\d7508b07903325957294ebdcb89bd5b3.exe
    "C:\Users\Admin\AppData\Local\Temp\d7508b07903325957294ebdcb89bd5b3.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • 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
    • System policy modification
    PID:1456
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\d7508b07903325957294ebdcb89bd5b3.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1220
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\System32\SystemSettings.Handlers\taskhostw.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5420
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\en-US\smss.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1144
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Documents\fontdrvhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4368
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default\Videos\Idle.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1368
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1080
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\StartMenuExperienceHost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1488
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hpgeZ6SzYc.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:244
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:740
        • C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe
          "C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:3092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\SystemSettings.Handlers\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4320
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\en-US\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:728
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\ProgramData\Documents\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4572
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\Default\Videos\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4536
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4664
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4692

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe

      Filesize

      1.1MB

      MD5

      d7508b07903325957294ebdcb89bd5b3

      SHA1

      b6280b6c5e4b601ba3182520eca834aecd1ae1fc

      SHA256

      4fe2546f5efe48febc2db59093ceef7b1c3db73e3b11ba026bfd8c4444b2af8e

      SHA512

      e79cd38b556481bd3da6fcde5e924c2c0161a7e26ba635d02f393a424cf675b63e61948c7162abc06c487ae661ff431062236327be9b68be90e6ace7bfd23808

    • C:\Program Files (x86)\Windows Multimedia Platform\backgroundTaskHost.exe

      Filesize

      1.1MB

      MD5

      06f6f42d1fa97a08ece2264d33a5a2fe

      SHA1

      1e08f2d67cf7447be8f778fba12ab8d15d20e778

      SHA256

      6ee910a8e16c49b5eab45caee5b2f9d82e5a6ae6e775bc6680cf8bc3da39b575

      SHA512

      af0e61bc5b9e0326862f6886670a03103eaaa5e11356c2ff4fcc26e4262b5210301bae0d2de01e42f74165407828d9874a085bc1f8e1288839ad9ddc9b3c376f

    • 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

      2cb0c163f92e343cbfa657ce4d842fb6

      SHA1

      0299696d7430f09f9e3d32aa5b95f01363b405f5

      SHA256

      c604c709aa50f7f59c87b4420713c8563bc5b80d9bce8f812d26e0a7c25d13f7

      SHA512

      780353a0fa086a96d6b186a4f38160b0521e972ccfa18803db64ecd2ef6d3c1c69ea4dba0b557f1cf7c1ff6ab8720e447e827c92549b6aea5a0ecacd0494b8d8

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

      Filesize

      944B

      MD5

      0f29d4b03e157fa020f2b793683543af

      SHA1

      1b0603266b02dd38444489e0d5e18ee93b6b766a

      SHA256

      eec5516679b34fb0efe983a81cc19b0b5cf33fd3191d5d8fd5c3fb082a55d410

      SHA512

      b0cca3aa1373f813a7a16a1ca94b7e048d83f8875b28949d7ece9668c5cb847250d1468080a85e478833a8876b668a8a6e0ef4df4a289ca66badac3af00dc5c4

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

      Filesize

      944B

      MD5

      452593747a6f6f0b2e08d8502e1ec6e7

      SHA1

      027c3a7f5f18e7a1e96bbf2a3d3c267e72821836

      SHA256

      495c62eea4eb41269dbcdba0c0acd65d27a407ac837f5c04feaaa0542963b33d

      SHA512

      17a8288467e77ade8e81bf7620e9013ff3690c2577a172ce30734c65ca2d2328afd3737dd6a9fb6b4d7ba673767f094986f6b996f5920d7e1cdecdf019e37488

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_reeuemx1.sdu.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\hpgeZ6SzYc.bat

      Filesize

      237B

      MD5

      b7feb667205a6c449ce02f09be9de977

      SHA1

      4d6eeec0fe6365491e645cf6cfc833d7d46eed26

      SHA256

      7450247a8dba08d2115ff6d5e354c0fb96da6d671c0fba4c1355ee980d047cc4

      SHA512

      fe4102fc9c4c942799cd9c098bd3d2b6224437099b704cf078acdb416a072930e9b161e4cc40992487378027ba716ffcabe693971c64c1375f80baf9b8c9ce07

    • C:\Windows\System32\SystemSettings.Handlers\taskhostw.exe

      Filesize

      1.1MB

      MD5

      c352378ac9b1f657296fe5f59ab423ff

      SHA1

      5d7ad6725b88191452eccd670f3fbfabb3e149d4

      SHA256

      8f4a8d63793a5f14743d5f2c333623214b1dc1814158e36cbdcf451d5cc70a98

      SHA512

      c57005a9d36ff23bcc8fba1612c848323e1a83293f8bd4dac390693e9db68c3f54071dba7513fd61b4ef441a77478ba654c972cc2472a3cd52d05f0b7f4ee3f2

    • memory/1220-110-0x00000202BF2F0000-0x00000202BF312000-memory.dmp

      Filesize

      136KB

    • memory/1456-4-0x0000000000BD0000-0x0000000000BDA000-memory.dmp

      Filesize

      40KB

    • memory/1456-100-0x00007FFD82340000-0x00007FFD82E01000-memory.dmp

      Filesize

      10.8MB

    • memory/1456-3-0x00007FFD82340000-0x00007FFD82E01000-memory.dmp

      Filesize

      10.8MB

    • memory/1456-5-0x0000000000BE0000-0x0000000000BEC000-memory.dmp

      Filesize

      48KB

    • memory/1456-7-0x0000000000C10000-0x0000000000C1A000-memory.dmp

      Filesize

      40KB

    • memory/1456-0-0x00007FFD82343000-0x00007FFD82345000-memory.dmp

      Filesize

      8KB

    • memory/1456-2-0x0000000000BC0000-0x0000000000BD0000-memory.dmp

      Filesize

      64KB

    • memory/1456-1-0x0000000000300000-0x0000000000416000-memory.dmp

      Filesize

      1.1MB

    • memory/1456-6-0x0000000000BF0000-0x0000000000BF8000-memory.dmp

      Filesize

      32KB

    • memory/3092-184-0x0000000000ED0000-0x0000000000FE6000-memory.dmp

      Filesize

      1.1MB