Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    17/04/2026, 03:28

General

  • Target
    2026-04-17_332050473ba6bcf3c06c5d93b96e808a_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 1.7MB
  • Sample260417-d1ffrses5k
  • SHA256 a446649bd1e45c5eb3e150d10d3be72bc728f26dbffb14c5e86c7705c5153fa7
  • 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 4 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
  • Custom signature
    Detects executables packed with SmartAssembly 5 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 8 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 11 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 20 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\2026-04-17_332050473ba6bcf3c06c5d93b96e808a_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-04-17_332050473ba6bcf3c06c5d93b96e808a_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.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:3988
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1208
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3248
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4812
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3484
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2492
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2800
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2240
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4084
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4432
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4296
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5024
    • C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe
      "C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe"
      2⤵
        PID:3416
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Defender\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Defender\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3044
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files\VideoLAN\VLC\skins\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:392
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\VideoLAN\VLC\skins\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4048
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files\VideoLAN\VLC\skins\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:692
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1172
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2700
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files\7-Zip\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\7-Zip\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\7-Zip\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2344
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\Registry.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3568
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Esl\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3248
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Esl\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4936
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Esl\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:116
    • C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe
      "C:\Program Files (x86)\Internet Explorer\de-DE\upfc.exe"
      1⤵
        PID:4280
      • C:\Program Files\VideoLAN\VLC\skins\dllhost.exe
        "C:\Program Files\VideoLAN\VLC\skins\dllhost.exe"
        1⤵
          PID:2896
        • C:\Program Files\7-Zip\csrss.exe
          "C:\Program Files\7-Zip\csrss.exe"
          1⤵
            PID:5080
          • C:\Program Files (x86)\Windows Defender\smss.exe
            "C:\Program Files (x86)\Windows Defender\smss.exe"
            1⤵
              PID:5556
            • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Esl\winlogon.exe
              "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Esl\winlogon.exe"
              1⤵
                PID:1132
              • C:\Program Files\Windows Photo Viewer\Registry.exe
                "C:\Program Files\Windows Photo Viewer\Registry.exe"
                1⤵
                  PID:6592

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      Registry.exe

                      • Path C:\Program Files\Windows Photo Viewer\Registry.exe
                      • Size 1.7MB
                      • SHA256 a446649bd1e45c5eb3e150d10d3be72bc728f26dbffb14c5e86c7705c5153fa7
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      __PSScriptPolicyTest_jmuqhzky.jtr.ps1

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

                      memory/1208-6684-0x0000000003040000-0x0000000003076000-memory.dmp

                      memory/1208-6685-0x0000000005960000-0x0000000005F88000-memory.dmp

                      memory/2800-8613-0x0000000005C60000-0x0000000005FB4000-memory.dmp

                      memory/2800-8429-0x00000000052A0000-0x00000000052C2000-memory.dmp

                      memory/2800-31966-0x0000000006600000-0x000000000664C000-memory.dmp

                      memory/2800-31216-0x0000000006000000-0x000000000601E000-memory.dmp

                      memory/2800-8431-0x0000000005A80000-0x0000000005AE6000-memory.dmp

                      memory/3988-78-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-122-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-10-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-22-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-20-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-16-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-14-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-8-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-18-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-12-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-5-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-34-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-46-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-52-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-54-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-50-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-48-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-44-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-42-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-38-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-60-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-37-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-32-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-30-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-26-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-24-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-28-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-56-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-58-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-96-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-94-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-92-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-90-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-88-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-86-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-84-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-82-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-76-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-74-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-68-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-66-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-64-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-80-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-4-0x0000000005210000-0x000000000548A000-memory.dmp

                      memory/3988-72-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-70-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-6-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-62-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-40-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-130-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-128-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-126-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-124-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-120-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-118-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-116-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-114-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-112-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-110-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-108-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-106-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-102-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-100-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-98-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-104-0x0000000005210000-0x0000000005484000-memory.dmp

                      memory/3988-1384-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-1716-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-1986-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-5228-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-5229-0x0000000002930000-0x000000000294C000-memory.dmp

                      memory/3988-5230-0x0000000002960000-0x00000000029B0000-memory.dmp

                      memory/3988-5232-0x0000000006020000-0x0000000006030000-memory.dmp

                      memory/3988-5231-0x00000000029C0000-0x00000000029C8000-memory.dmp

                      memory/3988-5233-0x00000000066F0000-0x0000000006706000-memory.dmp

                      memory/3988-5234-0x0000000006080000-0x0000000006088000-memory.dmp

                      memory/3988-5235-0x0000000006850000-0x0000000006860000-memory.dmp

                      memory/3988-5236-0x0000000006710000-0x000000000671A000-memory.dmp

                      memory/3988-5237-0x0000000006740000-0x000000000674C000-memory.dmp

                      memory/3988-5238-0x0000000006750000-0x0000000006762000-memory.dmp

                      memory/3988-5239-0x0000000006870000-0x0000000006D9C000-memory.dmp

                      memory/3988-5240-0x00000000067E0000-0x00000000067EC000-memory.dmp

                      memory/3988-5244-0x0000000007040000-0x000000000704C000-memory.dmp

                      memory/3988-5243-0x0000000007030000-0x0000000007038000-memory.dmp

                      memory/3988-5242-0x0000000007020000-0x000000000702A000-memory.dmp

                      memory/3988-5241-0x00000000067F0000-0x00000000067FC000-memory.dmp

                      memory/3988-5249-0x0000000007240000-0x00000000072A6000-memory.dmp

                      memory/3988-5246-0x00000000071F0000-0x00000000071FC000-memory.dmp

                      memory/3988-5250-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-5245-0x0000000007150000-0x00000000071E2000-memory.dmp

                      memory/3988-3-0x0000000005710000-0x0000000005CB4000-memory.dmp

                      memory/3988-2-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-1-0x0000000005490000-0x000000000570C000-memory.dmp

                      memory/3988-0-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-7187-0x0000000005200000-0x0000000005210000-memory.dmp

                      memory/3988-7569-0x0000000005200000-0x0000000005210000-memory.dmp