Analysis

  • max time kernel
    145s
  • max time network
    125s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/06/2026, 05:59

General

  • Target
    xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe
  • Size 2.0MB
  • Sample260602-gp9f9aew2v
  • SHA256 a037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23
  • 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 2 IoCs
  • Process spawned unexpected child process 18 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 7 IoCs

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

  • Drops file in Drivers directory 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • SmartAssembly .NET packer 7 IoCs

    Detects SmartAssembly .NET packer.

  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows 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 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 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\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe
    "C:\Users\Admin\AppData\Local\Temp\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:2860
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5360
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\appcompat\appraiser\wininit.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:6040
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:6048
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:6056
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft\smss.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:6064
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default User\dllhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:6072
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4460
    • C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe
      "C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe"
      2⤵
        PID:6248
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Windows\appcompat\appraiser\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4872
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\appcompat\appraiser\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4588
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Windows\appcompat\appraiser\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4080
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1700
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2636
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:712
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23x" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23" /sc ONLOGON /tr "'C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1852
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23x" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4408
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2316
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1680
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3112
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3572
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WUDFHostW" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2924
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WUDFHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2372
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WUDFHostW" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2540
    • C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe
      "C:\Users\All Users\xa037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23.exe"
      1⤵
        PID:3380
      • C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe
        "C:\Program Files (x86)\Windows Defender\de-DE\OfficeClickToRun.exe"
        1⤵
          PID:820
        • C:\Program Files (x86)\Microsoft\smss.exe
          "C:\Program Files (x86)\Microsoft\smss.exe"
          1⤵
            PID:4424
          • C:\Windows\appcompat\appraiser\wininit.exe
            "C:\Windows\appcompat\appraiser\wininit.exe"
            1⤵
              PID:3408
            • C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe
              "C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\WUDFHost.exe"
              1⤵
                PID:4680
              • C:\Users\Default User\dllhost.exe
                "C:\Users\Default User\dllhost.exe"
                1⤵
                  PID:1088

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      __PSScriptPolicyTest_qlr2mbvc.jox.ps1

                      • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qlr2mbvc.jox.ps1
                      • Size 60B
                      • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                      • MD5 SHA1 SHA512 TLSH

                      dllhost.exe

                      • Path C:\Users\Default\dllhost.exe
                      • Size 2.0MB
                      • SHA256 a037486095e4f4b90c749f50adc656cbcac1436297aa590571cddb8d8349ac23
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      memory/2860-0-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-1-0x00000000055B0000-0x0000000005868000-memory.dmp

                      memory/2860-2-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-3-0x0000000005870000-0x0000000005E16000-memory.dmp

                      memory/2860-4-0x00000000052F0000-0x00000000055A6000-memory.dmp

                      memory/2860-8-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-6-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-16-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-18-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-24-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-36-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-44-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-50-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-64-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-72-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-102-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-106-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-124-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-130-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-128-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-126-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-122-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-120-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-118-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-116-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-114-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-112-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-110-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-108-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-104-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-100-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-98-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-96-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-94-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-92-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-90-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-88-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-86-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-84-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-82-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-80-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-78-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-76-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-74-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-70-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-68-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-66-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-60-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-58-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-63-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-56-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-54-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-48-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-46-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-52-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-42-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-38-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-40-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-34-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-32-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-30-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-28-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-27-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-20-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-14-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-22-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-12-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-10-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-5-0x00000000052F0000-0x00000000055A1000-memory.dmp

                      memory/2860-646-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-827-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-1065-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-5228-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-5229-0x0000000002B50000-0x0000000002B6C000-memory.dmp

                      memory/2860-5230-0x0000000002B80000-0x0000000002BD0000-memory.dmp

                      memory/2860-5232-0x0000000006440000-0x0000000006450000-memory.dmp

                      memory/2860-5231-0x0000000002BE0000-0x0000000002BE8000-memory.dmp

                      memory/2860-5233-0x0000000006450000-0x0000000006466000-memory.dmp

                      memory/2860-5234-0x0000000006490000-0x0000000006498000-memory.dmp

                      memory/2860-5235-0x00000000064A0000-0x00000000064B2000-memory.dmp

                      memory/2860-5236-0x0000000006950000-0x0000000006958000-memory.dmp

                      memory/2860-5237-0x00000000064E0000-0x00000000064F0000-memory.dmp

                      memory/2860-5238-0x0000000006970000-0x0000000006A02000-memory.dmp

                      memory/2860-5239-0x0000000006A10000-0x0000000006A1A000-memory.dmp

                      memory/2860-5240-0x0000000006A20000-0x0000000006A28000-memory.dmp

                      memory/2860-5241-0x0000000006A40000-0x0000000006A4C000-memory.dmp

                      memory/2860-5242-0x0000000006A70000-0x0000000006A78000-memory.dmp

                      memory/2860-5244-0x0000000006A80000-0x0000000006A92000-memory.dmp

                      memory/2860-5245-0x0000000008F50000-0x000000000947C000-memory.dmp

                      memory/2860-5246-0x0000000008B20000-0x0000000008B2C000-memory.dmp

                      memory/2860-5247-0x0000000008B40000-0x0000000008B4C000-memory.dmp

                      memory/2860-5248-0x0000000008B50000-0x0000000008B5C000-memory.dmp

                      memory/2860-5249-0x0000000008B70000-0x0000000008B7C000-memory.dmp

                      memory/2860-5254-0x0000000009780000-0x0000000009788000-memory.dmp

                      memory/2860-5253-0x0000000008C50000-0x0000000008C5E000-memory.dmp

                      memory/2860-5252-0x0000000008C40000-0x0000000008C4A000-memory.dmp

                      memory/2860-5250-0x0000000008C10000-0x0000000008C18000-memory.dmp

                      memory/2860-5251-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-5256-0x00000000097A0000-0x00000000097AA000-memory.dmp

                      memory/2860-5255-0x0000000009790000-0x0000000009798000-memory.dmp

                      memory/2860-5257-0x00000000097B0000-0x00000000097BC000-memory.dmp

                      memory/2860-5260-0x00000000097E0000-0x0000000009846000-memory.dmp

                      memory/2860-6015-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/2860-6347-0x00000000052E0000-0x00000000052F0000-memory.dmp

                      memory/6040-16797-0x0000000005AE0000-0x0000000005B46000-memory.dmp

                      memory/6040-16792-0x0000000005300000-0x0000000005322000-memory.dmp

                      memory/6040-17325-0x0000000005BC0000-0x0000000005F17000-memory.dmp

                      memory/6056-8147-0x0000000005800000-0x0000000005E2A000-memory.dmp

                      memory/6056-8146-0x0000000005160000-0x0000000005196000-memory.dmp