Analysis

  • max time kernel
    30s
  • 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, 01:38

General

  • Target
    2026-05-31_557b2ad71d117753a950d8090abe5528_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 2.0MB
  • Sample260531-b2q8jsf16x
  • SHA256 a1556060afdf1d587caab7785205133baeb76f01b41e7193b115406da31c9de8
  • 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 15 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 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
  • 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 3 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 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 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\2026-05-31_557b2ad71d117753a950d8090abe5528_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-31_557b2ad71d117753a950d8090abe5528_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 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:4872
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\2026-05-31_557b2ad71d117753a950d8090abe5528_drokbk_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1676
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Internet Explorer\it-IT\spoolsv.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1156
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\csrss.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4892
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\es-ES\Registry.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2180
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Setup\State\fontdrvhost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4848
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default User\sihost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4224
    • C:\Recovery\WindowsRE\csrss.exe
      "C:\Recovery\WindowsRE\csrss.exe"
      2⤵
        PID:3452
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files\Internet Explorer\it-IT\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5028
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\it-IT\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1688
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Internet Explorer\it-IT\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1464
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 14 /tr "'C:\Windows\es-ES\Registry.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3592
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Windows\es-ES\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 11 /tr "'C:\Windows\es-ES\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3268
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Windows\Setup\State\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5016
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\Setup\State\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\Windows\Setup\State\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1348
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Users\Default User\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3508
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4660
    • C:\Windows\es-ES\Registry.exe
      "C:\Windows\es-ES\Registry.exe"
      1⤵
        PID:1588
      • C:\Recovery\WindowsRE\csrss.exe
        "C:\Recovery\WindowsRE\csrss.exe"
        1⤵
          PID:4796
        • C:\Windows\Setup\State\fontdrvhost.exe
          "C:\Windows\Setup\State\fontdrvhost.exe"
          1⤵
            PID:4992
          • C:\Program Files\Internet Explorer\it-IT\spoolsv.exe
            "C:\Program Files\Internet Explorer\it-IT\spoolsv.exe"
            1⤵
              PID:2312
            • C:\Users\Default User\sihost.exe
              "C:\Users\Default User\sihost.exe"
              1⤵
                PID:1500

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    __PSScriptPolicyTest_od25tbib.r1y.ps1

                    • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_od25tbib.r1y.ps1
                    • Size 60B
                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                    • MD5 SHA1 SHA512 TLSH

                    sihost.exe

                    • Path C:\Users\Default\sihost.exe
                    • Size 2.0MB
                    • SHA256 a1556060afdf1d587caab7785205133baeb76f01b41e7193b115406da31c9de8
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/1676-7371-0x0000000002AB0000-0x0000000002AE6000-memory.dmp

                    memory/1676-7399-0x00000000055E0000-0x0000000005C0A000-memory.dmp

                    memory/2180-31953-0x0000000007CF0000-0x000000000836A000-memory.dmp

                    memory/2180-32186-0x00000000076B0000-0x00000000076CA000-memory.dmp

                    memory/2180-9886-0x0000000005620000-0x0000000005642000-memory.dmp

                    memory/2180-29702-0x0000000006730000-0x0000000006764000-memory.dmp

                    memory/2180-29703-0x0000000070460000-0x00000000704AC000-memory.dmp

                    memory/2180-30336-0x0000000006670000-0x000000000668E000-memory.dmp

                    memory/2180-30370-0x0000000007310000-0x00000000073B4000-memory.dmp

                    memory/2180-13320-0x0000000006890000-0x00000000068DC000-memory.dmp

                    memory/2180-12968-0x00000000062E0000-0x00000000062FE000-memory.dmp

                    memory/2180-9887-0x00000000056C0000-0x0000000005726000-memory.dmp

                    memory/2180-10201-0x0000000005EA0000-0x00000000061F7000-memory.dmp

                    memory/4872-48-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-20-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-106-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-108-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-112-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-128-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-130-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-126-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-124-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-122-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-120-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-118-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-116-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-114-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-110-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-104-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-102-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-100-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-98-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-96-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-94-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-92-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-90-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-88-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-82-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-80-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-78-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-76-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-74-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-85-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-72-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-70-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-68-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-66-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-65-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-58-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-56-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-54-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-62-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-50-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-46-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-43-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-38-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-61-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-44-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-40-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-36-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-34-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-28-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-26-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-30-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-86-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-24-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-16-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-14-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-12-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-10-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-8-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-6-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-1611-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-1865-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-2098-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-5228-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-5229-0x0000000002C60000-0x0000000002C7C000-memory.dmp

                    memory/4872-5232-0x00000000066C0000-0x00000000066D0000-memory.dmp

                    memory/4872-5231-0x0000000002CF0000-0x0000000002CF8000-memory.dmp

                    memory/4872-5230-0x0000000002C90000-0x0000000002CE0000-memory.dmp

                    memory/4872-5233-0x00000000066D0000-0x00000000066E6000-memory.dmp

                    memory/4872-5234-0x0000000006910000-0x0000000006918000-memory.dmp

                    memory/4872-5235-0x0000000006A60000-0x0000000006A72000-memory.dmp

                    memory/4872-5236-0x0000000006920000-0x0000000006928000-memory.dmp

                    memory/4872-5237-0x0000000006A30000-0x0000000006A40000-memory.dmp

                    memory/4872-5238-0x0000000006B80000-0x0000000006C12000-memory.dmp

                    memory/4872-5239-0x00000000069A0000-0x00000000069AA000-memory.dmp

                    memory/4872-5240-0x00000000069C0000-0x00000000069C8000-memory.dmp

                    memory/4872-5241-0x00000000069D0000-0x00000000069DC000-memory.dmp

                    memory/4872-5242-0x00000000069F0000-0x00000000069F8000-memory.dmp

                    memory/4872-5244-0x0000000006A00000-0x0000000006A12000-memory.dmp

                    memory/4872-5245-0x0000000007C20000-0x000000000814C000-memory.dmp

                    memory/4872-5246-0x00000000081A0000-0x00000000081AC000-memory.dmp

                    memory/4872-5247-0x00000000081C0000-0x00000000081CC000-memory.dmp

                    memory/4872-5249-0x00000000081F0000-0x00000000081FC000-memory.dmp

                    memory/4872-5250-0x0000000008200000-0x0000000008208000-memory.dmp

                    memory/4872-5252-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-5255-0x0000000008610000-0x0000000008618000-memory.dmp

                    memory/4872-5257-0x0000000008630000-0x000000000863C000-memory.dmp

                    memory/4872-5254-0x0000000008600000-0x0000000008608000-memory.dmp

                    memory/4872-5253-0x00000000085D0000-0x00000000085DE000-memory.dmp

                    memory/4872-5251-0x00000000085A0000-0x00000000085AA000-memory.dmp

                    memory/4872-5256-0x0000000008620000-0x000000000862A000-memory.dmp

                    memory/4872-52-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-33-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-22-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-18-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-5-0x0000000005310000-0x00000000055C1000-memory.dmp

                    memory/4872-4-0x0000000005310000-0x00000000055C6000-memory.dmp

                    memory/4872-3-0x0000000005890000-0x0000000005E36000-memory.dmp

                    memory/4872-2-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-1-0x00000000055D0000-0x0000000005888000-memory.dmp

                    memory/4872-0-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-5248-0x00000000081D0000-0x00000000081DC000-memory.dmp

                    memory/4872-5260-0x0000000008650000-0x00000000086B6000-memory.dmp

                    memory/4872-7087-0x0000000005300000-0x0000000005310000-memory.dmp

                    memory/4872-7283-0x0000000005300000-0x0000000005310000-memory.dmp