Analysis

  • max time kernel
    83s
  • max time network
    106s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/10/2026, 08:36

General

  • Target
    2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 2.0MB
  • Sample261022-khpp2sss3n
  • SHA256 2f100b7b429dd9ff6e75050122ef5cbc25de7ca4bb4e221b17d78750a0a9eba0
  • 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 6 IoCs

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

  • UAC bypass 3 TTPs 3 IoCs
  • Detects executables packed with SmartAssembly 7 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 5 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • SmartAssembly .NET packer 7 IoCs

    Detects SmartAssembly .NET packer.

  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 4 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\2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.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 System32 directory
    • Drops file in Program Files directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4292
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:5676
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\dotnet\upfc.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:4160
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\SysWOW64\fr\fontdrvhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:824
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hy3B39XMXx.bat"
      2⤵
      • Executes a command shell one-liner
      PID:6308
      • C:\Windows\SysWOW64\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:4888
          • C:\Windows\system32\w32tm.exe
            w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
            4⤵
              PID:5396
          • C:\Users\Admin\AppData\Local\Temp\2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
            "C:\Users\Admin\AppData\Local\Temp\2026-10-21_cc625d9b4742e9967375db6554236b67_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
            3⤵
              PID:1044
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 11 /tr "'C:\Program Files\dotnet\upfc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4196
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\dotnet\upfc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1944
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Program Files\dotnet\upfc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4712
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Windows\SysWOW64\fr\fontdrvhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:6004
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\SysWOW64\fr\fontdrvhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4656
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Windows\SysWOW64\fr\fontdrvhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:5844
        • C:\Windows\SysWOW64\fr\fontdrvhost.exe
          "C:\Windows\SysWOW64\fr\fontdrvhost.exe"
          1⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:5524
        • C:\Program Files\dotnet\upfc.exe
          "C:\Program Files\dotnet\upfc.exe"
          1⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:5348
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\1571d165-09b1-482c-b2eb-10c7ba0c7eee.vbs"
            2⤵
            • Executes a VBScript file via the Windows Script Host.
            PID:956
            • C:\Program Files\dotnet\upfc.exe
              "C:\Program Files\dotnet\upfc.exe"
              3⤵
                PID:1716
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\f4d49e94-76ed-4455-a991-e9925aeb1656.vbs"
              2⤵
              • Executes a VBScript file via the Windows Script Host.
              PID:2276
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k GPSvcGroup
            1⤵
              PID:204

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  upfc.exe

                  • Path C:\Program Files\dotnet\upfc.exe
                  • Size 2.0MB
                  • SHA256 4879305a20ff4d680c8308c545e415d121430d10359816bd2480aea9f7d9b3fd
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  1571d165-09b1-482c-b2eb-10c7ba0c7eee.vbs

                  • Path C:\Users\Admin\AppData\Local\Temp\1571d165-09b1-482c-b2eb-10c7ba0c7eee.vbs
                  • Size 708B
                  • SHA256 6464f911d18c1d77ca5ce85dded84bfbecf94f9982581bea64678b7efed3a596
                  • MD5 SHA1 SHA512 TLSH

                  __PSScriptPolicyTest_aes4a2x3.3ct.psm1

                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aes4a2x3.3ct.psm1
                  • Size 60B
                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                  • MD5 SHA1 SHA512 TLSH

                  f4d49e94-76ed-4455-a991-e9925aeb1656.vbs

                  • Path C:\Users\Admin\AppData\Local\Temp\f4d49e94-76ed-4455-a991-e9925aeb1656.vbs
                  • Size 484B
                  • SHA256 4a31067c188a36b9ec9632185a2f7373b4b6a023997f1c34eaf8c57cea76a5a5
                  • MD5 SHA1 SHA512 TLSH

                  hy3B39XMXx.bat

                  • Path C:\Users\Admin\AppData\Local\Temp\hy3B39XMXx.bat
                  • Size 303B
                  • SHA256 79c3e398d15546bfd62e150958617240b214289315bb27a147432d156fec8e38
                  • MD5 SHA1 SHA512 TLSH

                  fontdrvhost.exe

                  • Path C:\Windows\SysWOW64\fr\fontdrvhost.exe
                  • Size 2.0MB
                  • SHA256 2f100b7b429dd9ff6e75050122ef5cbc25de7ca4bb4e221b17d78750a0a9eba0
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  memory/824-17025-0x0000000007900000-0x0000000007996000-memory.dmp

                  memory/824-15761-0x0000000006930000-0x0000000006966000-memory.dmp

                  memory/824-14581-0x0000000005E70000-0x00000000061CB000-memory.dmp

                  memory/824-15744-0x0000000006210000-0x000000000622E000-memory.dmp

                  memory/824-15784-0x0000000007590000-0x0000000007633000-memory.dmp

                  memory/824-15762-0x0000000070710000-0x000000007075C000-memory.dmp

                  memory/824-15765-0x0000000006970000-0x0000000006990000-memory.dmp

                  memory/824-16611-0x00000000076A0000-0x00000000076BA000-memory.dmp

                  memory/824-16851-0x0000000007700000-0x000000000770A000-memory.dmp

                  memory/824-15745-0x0000000006430000-0x000000000647C000-memory.dmp

                  memory/4160-13355-0x0000000005590000-0x00000000055B2000-memory.dmp

                  memory/4160-15884-0x0000000070710000-0x000000007075C000-memory.dmp

                  memory/4160-16606-0x0000000007CF0000-0x000000000836C000-memory.dmp

                  memory/4160-10555-0x0000000005750000-0x0000000005D9A000-memory.dmp

                  memory/4160-13574-0x0000000005630000-0x0000000005696000-memory.dmp

                  memory/4292-96-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-1625-0x0000000074232000-0x0000000074233000-memory.dmp

                  memory/4292-72-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-70-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-68-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-64-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-56-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-55-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-52-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-50-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-48-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-58-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-44-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-43-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-40-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-38-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-36-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-34-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-31-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-29-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-46-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-21-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-22-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-17-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-12-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-10-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-7-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-8-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-116-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-120-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-128-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-132-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-130-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-126-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-124-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-122-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-118-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-112-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-110-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-108-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-106-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-104-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-102-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-101-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-98-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-76-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-114-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-94-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-92-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-90-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-88-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-86-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-84-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-83-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-80-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-74-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-1629-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-5229-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-5230-0x0000000002AC0000-0x0000000002ADC000-memory.dmp

                  memory/4292-5231-0x0000000002AF0000-0x0000000002B40000-memory.dmp

                  memory/4292-5233-0x00000000064E0000-0x00000000064F0000-memory.dmp

                  memory/4292-5232-0x0000000002B50000-0x0000000002B58000-memory.dmp

                  memory/4292-5235-0x0000000006530000-0x0000000006538000-memory.dmp

                  memory/4292-5236-0x0000000006540000-0x0000000006552000-memory.dmp

                  memory/4292-5234-0x00000000064F0000-0x0000000006506000-memory.dmp

                  memory/4292-5237-0x00000000069F0000-0x00000000069F8000-memory.dmp

                  memory/4292-5238-0x0000000006580000-0x0000000006590000-memory.dmp

                  memory/4292-5240-0x0000000006A10000-0x0000000006A1A000-memory.dmp

                  memory/4292-5239-0x0000000006A20000-0x0000000006AB2000-memory.dmp

                  memory/4292-5241-0x0000000006AC0000-0x0000000006AC8000-memory.dmp

                  memory/4292-5242-0x0000000006B30000-0x0000000006B3C000-memory.dmp

                  memory/4292-5243-0x0000000006B00000-0x0000000006B08000-memory.dmp

                  memory/4292-5245-0x0000000006B10000-0x0000000006B22000-memory.dmp

                  memory/4292-5246-0x0000000007D10000-0x000000000823C000-memory.dmp

                  memory/4292-5247-0x0000000008260000-0x000000000826C000-memory.dmp

                  memory/4292-5248-0x0000000008280000-0x000000000828C000-memory.dmp

                  memory/4292-5249-0x0000000008290000-0x000000000829C000-memory.dmp

                  memory/4292-5250-0x00000000082B0000-0x00000000082BC000-memory.dmp

                  memory/4292-5253-0x0000000008670000-0x000000000867E000-memory.dmp

                  memory/4292-5255-0x00000000086B0000-0x00000000086B8000-memory.dmp

                  memory/4292-5256-0x00000000086C0000-0x00000000086CA000-memory.dmp

                  memory/4292-5257-0x00000000086D0000-0x00000000086DC000-memory.dmp

                  memory/4292-5254-0x00000000086A0000-0x00000000086A8000-memory.dmp

                  memory/4292-5252-0x0000000008660000-0x000000000866A000-memory.dmp

                  memory/4292-5258-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-5251-0x00000000082C0000-0x00000000082C8000-memory.dmp

                  memory/4292-5260-0x0000000008710000-0x0000000008776000-memory.dmp

                  memory/4292-5266-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-7357-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-78-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-66-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-7979-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-8324-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-14590-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-62-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-0-0x0000000074232000-0x0000000074233000-memory.dmp

                  memory/4292-60-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-32-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-25-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-26-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-18-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-15-0x0000000005130000-0x00000000053E1000-memory.dmp

                  memory/4292-6-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-3-0x00000000056B0000-0x0000000005C6A000-memory.dmp

                  memory/4292-5-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-1-0x00000000053F0000-0x00000000056A8000-memory.dmp

                  memory/4292-2-0x0000000074220000-0x00000000749DC000-memory.dmp

                  memory/4292-4-0x0000000005130000-0x00000000053E6000-memory.dmp

                  memory/5348-15052-0x0000000006530000-0x0000000006542000-memory.dmp

                  memory/5676-16445-0x0000000070710000-0x000000007075C000-memory.dmp

                  memory/5676-8822-0x0000000002950000-0x0000000002986000-memory.dmp