Analysis

  • max time kernel
    35s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/04/2026, 17:44

General

  • Target
    x7f08eaef4f99c76f0968d9f93cb3353edf9c6f630975215ec1957f5fe7c755fe.exe
  • Size 1.7MB
  • Sample260422-wbbemac16n
  • SHA256 7f08eaef4f99c76f0968d9f93cb3353edf9c6f630975215ec1957f5fe7c755fe
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: DcRat

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Process spawned unexpected child process 15 IoCs

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

  • UAC bypass 3 TTPs 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 11 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • SmartAssembly .NET packer 5 IoCs

    Detects SmartAssembly .NET packer.

  • Drops file in Program Files directory 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • System policy modification 1 TTPs 3 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\x7f08eaef4f99c76f0968d9f93cb3353edf9c6f630975215ec1957f5fe7c755fe.exe
    "C:\Users\Admin\AppData\Local\Temp\x7f08eaef4f99c76f0968d9f93cb3353edf9c6f630975215ec1957f5fe7c755fe.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:3704
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4836
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:876
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1096
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2480
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:960
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2712
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4336
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3768
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4344
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5132
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5148
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\VMycoP0vGx.bat"
      2⤵
        PID:6600
        • C:\Windows\SysWOW64\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          3⤵
            PID:5552
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              4⤵
                PID:6468
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3236
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2996
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Sidebar\Gadgets\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:5088
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4832
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3936
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1940
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Program Files\Mozilla Firefox\defaults\dwm.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4516
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\defaults\dwm.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4916
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Program Files\Mozilla Firefox\defaults\dwm.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1620
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "servicess" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3912
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4404
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2684
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\fontdrvhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3348
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Default User\fontdrvhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1484
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\fontdrvhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1860
        • C:\Program Files\Windows Sidebar\Gadgets\csrss.exe
          "C:\Program Files\Windows Sidebar\Gadgets\csrss.exe"
          1⤵
            PID:3788
          • C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe
            "C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe"
            1⤵
              PID:1828
            • C:\Program Files\Mozilla Firefox\defaults\dwm.exe
              "C:\Program Files\Mozilla Firefox\defaults\dwm.exe"
              1⤵
                PID:3584
              • C:\Recovery\WindowsRE\OfficeClickToRun.exe
                "C:\Recovery\WindowsRE\OfficeClickToRun.exe"
                1⤵
                  PID:692
                • C:\Users\Default User\fontdrvhost.exe
                  "C:\Users\Default User\fontdrvhost.exe"
                  1⤵
                    PID:4380

                  Network

                        MITRE ATT&CK Enterprise v16

                        Replay Monitor

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                        Downloads

                        VMycoP0vGx.bat

                        • Path C:\Users\Admin\AppData\Local\Temp\VMycoP0vGx.bat
                        • Size 202B
                        • SHA256 70f040e20662806264f66be26167f9e8eab40d6cd1065e76e69ea48dd6e81e81
                        • MD5 SHA1 SHA512 TLSH

                        __PSScriptPolicyTest_2hnpllyq.v4o.ps1

                        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2hnpllyq.v4o.ps1
                        • Size 60B
                        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                        • MD5 SHA1 SHA512 TLSH

                        fontdrvhost.exe

                        • Path C:\Users\Default\fontdrvhost.exe
                        • Size 1.7MB
                        • SHA256 7f08eaef4f99c76f0968d9f93cb3353edf9c6f630975215ec1957f5fe7c755fe
                        • MD5 SHA1 SHA512 SSDEEP TLSH

                        memory/2480-8372-0x0000000005170000-0x0000000005798000-memory.dmp

                        memory/2712-14091-0x0000000005640000-0x0000000005994000-memory.dmp

                        memory/3704-82-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-72-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-2-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-3-0x0000000005660000-0x0000000005C04000-memory.dmp

                        memory/3704-4-0x0000000005160000-0x00000000053DA000-memory.dmp

                        memory/3704-12-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-8-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-32-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-74-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-14-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-5-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-10-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-6-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-40-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-34-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-30-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-28-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-27-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-24-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-22-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-20-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-18-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-50-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-56-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-70-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-78-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-94-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-112-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-120-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-118-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-116-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-114-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-80-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-108-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-106-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-104-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-102-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-100-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-98-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-96-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-92-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-90-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-88-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-86-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-84-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-0-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-110-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-1-0x00000000053E0000-0x000000000565C000-memory.dmp

                        memory/3704-16-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-76-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-68-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-66-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-64-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-62-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-60-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-54-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-52-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-48-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-46-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-44-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-42-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-58-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-38-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-36-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-122-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-130-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-128-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-124-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-126-0x0000000005160000-0x00000000053D4000-memory.dmp

                        memory/3704-1870-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-5229-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-5230-0x0000000004B80000-0x0000000004B9C000-memory.dmp

                        memory/3704-5231-0x0000000004BB0000-0x0000000004C00000-memory.dmp

                        memory/3704-5233-0x0000000006220000-0x0000000006230000-memory.dmp

                        memory/3704-5232-0x0000000004C10000-0x0000000004C18000-memory.dmp

                        memory/3704-5235-0x0000000006260000-0x0000000006268000-memory.dmp

                        memory/3704-5234-0x00000000062E0000-0x00000000062F6000-memory.dmp

                        memory/3704-5236-0x0000000006300000-0x0000000006310000-memory.dmp

                        memory/3704-5237-0x0000000006720000-0x000000000672A000-memory.dmp

                        memory/3704-5238-0x0000000006750000-0x000000000675C000-memory.dmp

                        memory/3704-5239-0x0000000006760000-0x0000000006772000-memory.dmp

                        memory/3704-5240-0x0000000006870000-0x0000000006D9C000-memory.dmp

                        memory/3704-5241-0x00000000067F0000-0x00000000067FC000-memory.dmp

                        memory/3704-5242-0x0000000006800000-0x000000000680C000-memory.dmp

                        memory/3704-5243-0x0000000006830000-0x000000000683A000-memory.dmp

                        memory/3704-5245-0x0000000007120000-0x000000000712C000-memory.dmp

                        memory/3704-5244-0x0000000006850000-0x0000000006858000-memory.dmp

                        memory/3704-5246-0x0000000007130000-0x00000000071C2000-memory.dmp

                        memory/3704-5248-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-5247-0x00000000071F0000-0x00000000071FC000-memory.dmp

                        memory/3704-5251-0x0000000007230000-0x0000000007296000-memory.dmp

                        memory/3704-6482-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/3704-6895-0x0000000005150000-0x0000000005160000-memory.dmp

                        memory/4836-8368-0x00000000030A0000-0x00000000030D6000-memory.dmp

                        memory/4836-13658-0x0000000005FF0000-0x0000000006056000-memory.dmp

                        memory/4836-13657-0x0000000005910000-0x0000000005932000-memory.dmp