Analysis

  • max time kernel
    33s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    31/05/2026, 02:11

General

  • Target
    2026-05-31_e442a9c224372f22764573ee2f455f01_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 2.0MB
  • Sample260531-cmpxlsaw9l
  • SHA256 b8339a7f702abfc80b0e5ff2422f266d89e0fb67ffcdbd4c2281b35f231eeb9c
  • 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 5 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
  • Detects executables packed with SmartAssembly 7 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 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 4 IoCs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • SmartAssembly .NET packer 7 IoCs

    Detects SmartAssembly .NET packer.

  • Drops file in Windows directory 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\2026-05-31_e442a9c224372f22764573ee2f455f01_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-31_e442a9c224372f22764573ee2f455f01_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 Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:764
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\2026-05-31_e442a9c224372f22764573ee2f455f01_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1340
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\sihost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:776
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\wininit.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4280
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\sppsvc.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5508
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\SearchHost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5152
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default\Pictures\fontdrvhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3020
    • C:\Users\Default\Pictures\fontdrvhost.exe
      "C:\Users\Default\Pictures\fontdrvhost.exe"
      2⤵
        PID:6164
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5332
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4912
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5532
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4124
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4528
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4128
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2192
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Users\Default\Pictures\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3284
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Default\Pictures\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:388
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Pictures\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3264
    • C:\Recovery\WindowsRE\sppsvc.exe
      "C:\Recovery\WindowsRE\sppsvc.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:1084
    • C:\Recovery\WindowsRE\sihost.exe
      "C:\Recovery\WindowsRE\sihost.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:1416
    • C:\Users\Default\Pictures\fontdrvhost.exe
      "C:\Users\Default\Pictures\fontdrvhost.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1592
    • C:\Recovery\WindowsRE\SearchHost.exe
      "C:\Recovery\WindowsRE\SearchHost.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4476
    • C:\Recovery\WindowsRE\wininit.exe
      "C:\Recovery\WindowsRE\wininit.exe"
      1⤵
        PID:3696

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            __PSScriptPolicyTest_q0jayflv.rxa.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q0jayflv.rxa.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512 TLSH

            fontdrvhost.exe

            • Path C:\Users\Default\Pictures\fontdrvhost.exe
            • Size 2.0MB
            • SHA256 b8339a7f702abfc80b0e5ff2422f266d89e0fb67ffcdbd4c2281b35f231eeb9c
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/764-0-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-1-0x0000000005650000-0x0000000005908000-memory.dmp

            memory/764-2-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-3-0x0000000005910000-0x0000000005EB6000-memory.dmp

            memory/764-4-0x0000000005390000-0x0000000005646000-memory.dmp

            memory/764-8-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-18-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-6-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-10-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-5-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-28-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-34-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-32-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-30-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-27-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-22-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-20-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-24-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-16-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-14-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-12-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-40-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-36-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-42-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-56-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-64-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-63-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-78-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-98-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-96-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-110-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-108-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-106-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-104-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-102-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-100-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-94-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-92-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-90-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-89-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-86-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-84-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-82-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-80-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-76-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-70-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-68-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-66-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-74-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-72-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-58-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-60-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-50-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-48-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-46-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-39-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-54-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-52-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-44-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-130-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-124-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-122-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-120-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-118-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-116-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-128-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-126-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-114-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-112-0x0000000005390000-0x0000000005641000-memory.dmp

            memory/764-1541-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-1781-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-1996-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-5228-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-5229-0x0000000002CB0000-0x0000000002CCC000-memory.dmp

            memory/764-5230-0x0000000002CE0000-0x0000000002D30000-memory.dmp

            memory/764-5232-0x00000000066C0000-0x00000000066D0000-memory.dmp

            memory/764-5231-0x0000000002D40000-0x0000000002D48000-memory.dmp

            memory/764-5233-0x00000000066D0000-0x00000000066E6000-memory.dmp

            memory/764-5234-0x0000000006910000-0x0000000006918000-memory.dmp

            memory/764-5235-0x0000000006A60000-0x0000000006A72000-memory.dmp

            memory/764-5236-0x0000000006920000-0x0000000006928000-memory.dmp

            memory/764-5237-0x0000000006A30000-0x0000000006A40000-memory.dmp

            memory/764-5238-0x0000000007C10000-0x0000000007CA2000-memory.dmp

            memory/764-5239-0x0000000006990000-0x000000000699A000-memory.dmp

            memory/764-5244-0x0000000006A00000-0x0000000006A12000-memory.dmp

            memory/764-5242-0x00000000069F0000-0x00000000069F8000-memory.dmp

            memory/764-5241-0x00000000069D0000-0x00000000069DC000-memory.dmp

            memory/764-5240-0x00000000069B0000-0x00000000069B8000-memory.dmp

            memory/764-5245-0x0000000007CB0000-0x00000000081DC000-memory.dmp

            memory/764-5246-0x0000000006BD0000-0x0000000006BDC000-memory.dmp

            memory/764-5247-0x0000000006BF0000-0x0000000006BFC000-memory.dmp

            memory/764-5248-0x0000000006C00000-0x0000000006C0C000-memory.dmp

            memory/764-5249-0x00000000081F0000-0x00000000081FC000-memory.dmp

            memory/764-5250-0x00000000084B0000-0x00000000084B8000-memory.dmp

            memory/764-5251-0x0000000008490000-0x000000000849A000-memory.dmp

            memory/764-5252-0x00000000084A0000-0x00000000084AE000-memory.dmp

            memory/764-5253-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-5254-0x0000000008600000-0x0000000008608000-memory.dmp

            memory/764-5256-0x0000000008620000-0x000000000862A000-memory.dmp

            memory/764-5255-0x0000000008610000-0x0000000008618000-memory.dmp

            memory/764-5257-0x0000000008630000-0x000000000863C000-memory.dmp

            memory/764-5260-0x00000000087B0000-0x0000000008816000-memory.dmp

            memory/764-8055-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/764-8557-0x0000000005380000-0x0000000005390000-memory.dmp

            memory/776-12016-0x0000000005970000-0x0000000005CC7000-memory.dmp

            memory/3020-8706-0x0000000005310000-0x000000000593A000-memory.dmp

            memory/3020-8705-0x0000000002A80000-0x0000000002AB6000-memory.dmp

            memory/3020-11907-0x0000000005210000-0x0000000005232000-memory.dmp

            memory/3020-11921-0x0000000005940000-0x00000000059A6000-memory.dmp

            memory/3020-15387-0x0000000006050000-0x000000000606E000-memory.dmp

            memory/3020-15774-0x0000000006130000-0x000000000617C000-memory.dmp

            memory/3020-30295-0x000000006F130000-0x000000006F17C000-memory.dmp

            memory/3020-30290-0x00000000065E0000-0x0000000006614000-memory.dmp

            memory/3020-30783-0x0000000007000000-0x00000000070A4000-memory.dmp

            memory/3020-30763-0x0000000006FE0000-0x0000000006FFE000-memory.dmp

            memory/3020-32533-0x0000000007A80000-0x00000000080FA000-memory.dmp