Analysis

  • max time kernel
    35s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    25/04/2026, 02:11

General

  • Target
    x58c8a44dd21f79b2bbebc0860892807a048fc72942cef7012bc81770e0227771.exe
  • Size 1.7MB
  • Sample260425-cmsy9scs21
  • SHA256 58c8a44dd21f79b2bbebc0860892807a048fc72942cef7012bc81770e0227771
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: DcRat 16 IoCs

    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
  • 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.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 10 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 5 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 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 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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\x58c8a44dd21f79b2bbebc0860892807a048fc72942cef7012bc81770e0227771.exe
    "C:\Users\Admin\AppData\Local\Temp\x58c8a44dd21f79b2bbebc0860892807a048fc72942cef7012bc81770e0227771.exe"
    1⤵
    • Family: DcRat
    • 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:1076
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2196
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4972
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4476
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:1912
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:2840
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:4628
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3312
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3372
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:948
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:5348
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      PID:3352
    • C:\Recovery\WindowsRE\SearchHost.exe
      "C:\Recovery\WindowsRE\SearchHost.exe"
      2⤵
        PID:1784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5468
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4336
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2040
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Program Files\Java\jre-1.8\services.exe'" /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\Java\jre-1.8\services.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5156
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Program Files\Java\jre-1.8\services.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:488
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:764
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5548
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2464
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2808
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3108
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\SearchHost.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1036
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Family: DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2780
    • C:\Program Files\Java\jre-1.8\services.exe
      "C:\Program Files\Java\jre-1.8\services.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3324
    • C:\Recovery\WindowsRE\RuntimeBroker.exe
      "C:\Recovery\WindowsRE\RuntimeBroker.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2836
    • C:\Recovery\WindowsRE\Registry.exe
      "C:\Recovery\WindowsRE\Registry.exe"
      1⤵
        PID:5448
      • C:\Recovery\WindowsRE\winlogon.exe
        "C:\Recovery\WindowsRE\winlogon.exe"
        1⤵
          PID:2872
        • C:\Recovery\WindowsRE\SearchHost.exe
          "C:\Recovery\WindowsRE\SearchHost.exe"
          1⤵
            PID:4516

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                winlogon.exe

                • Path C:\Recovery\WindowsRE\winlogon.exe
                • Size 1.7MB
                • SHA256 58c8a44dd21f79b2bbebc0860892807a048fc72942cef7012bc81770e0227771
                • MD5 SHA1 SHA512 SSDEEP TLSH

                ModuleAnalysisCache

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                • Size 59KB
                • SHA256 d58eddb7a6a908c083ffb6e7b7b9f06ab9c66410ad17b410de3a10da825fe01b
                • MD5 SHA1 SHA512 SSDEEP TLSH

                __PSScriptPolicyTest_5xqekqdv.gjg.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5xqekqdv.gjg.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512 TLSH

                memory/1076-121-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-5253-0x0000000007450000-0x00000000074B6000-memory.dmp

                memory/1076-3-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-4-0x00000000057F0000-0x0000000005D96000-memory.dmp

                memory/1076-5-0x00000000052F0000-0x000000000556A000-memory.dmp

                memory/1076-17-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-23-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-27-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-45-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-53-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-55-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-67-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-77-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-115-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-85-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-83-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-81-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-79-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-73-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-71-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-69-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-65-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-63-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-61-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-76-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-57-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-59-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-51-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-49-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-47-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-43-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-37-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-41-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-39-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-33-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-31-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-29-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-25-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-21-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-35-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-19-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-15-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-13-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-11-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-9-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-7-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-6-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-107-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-105-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-129-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-127-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-125-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-123-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-1-0x0000000005570000-0x00000000057EC000-memory.dmp

                memory/1076-2-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-119-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-87-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-113-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-103-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-99-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-97-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-95-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-93-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-92-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-132-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-111-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-110-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-101-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-89-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-1655-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-2055-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-5231-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-5232-0x0000000002C50000-0x0000000002C6C000-memory.dmp

                memory/1076-5233-0x0000000002C80000-0x0000000002CD0000-memory.dmp

                memory/1076-5235-0x00000000062B0000-0x00000000062C0000-memory.dmp

                memory/1076-5234-0x0000000002CE0000-0x0000000002CE8000-memory.dmp

                memory/1076-5236-0x0000000006910000-0x0000000006926000-memory.dmp

                memory/1076-5237-0x0000000006310000-0x0000000006318000-memory.dmp

                memory/1076-5238-0x0000000006A70000-0x0000000006A80000-memory.dmp

                memory/1076-5239-0x0000000006930000-0x000000000693A000-memory.dmp

                memory/1076-5240-0x0000000006960000-0x000000000696C000-memory.dmp

                memory/1076-5241-0x0000000006970000-0x0000000006982000-memory.dmp

                memory/1076-5242-0x0000000006A90000-0x0000000006FBC000-memory.dmp

                memory/1076-5243-0x0000000006A00000-0x0000000006A0C000-memory.dmp

                memory/1076-5244-0x0000000006A10000-0x0000000006A1C000-memory.dmp

                memory/1076-5246-0x0000000006A60000-0x0000000006A68000-memory.dmp

                memory/1076-5245-0x0000000006A40000-0x0000000006A4A000-memory.dmp

                memory/1076-5248-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-5247-0x0000000007340000-0x000000000734C000-memory.dmp

                memory/1076-5249-0x0000000007370000-0x0000000007402000-memory.dmp

                memory/1076-5250-0x0000000007430000-0x000000000743C000-memory.dmp

                memory/1076-117-0x00000000052F0000-0x0000000005564000-memory.dmp

                memory/1076-7738-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-8490-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1076-0-0x00000000052E0000-0x00000000052F0000-memory.dmp

                memory/1912-26925-0x000000006FB40000-0x000000006FB8C000-memory.dmp

                memory/2196-9650-0x00000000060C0000-0x000000000610C000-memory.dmp

                memory/2196-9179-0x0000000004BC0000-0x0000000004BDE000-memory.dmp

                memory/2196-26924-0x0000000006200000-0x000000000621E000-memory.dmp

                memory/2196-7900-0x00000000056E0000-0x0000000005702000-memory.dmp

                memory/2196-8052-0x0000000005980000-0x0000000005CD7000-memory.dmp

                memory/2196-26338-0x00000000062D0000-0x0000000006304000-memory.dmp

                memory/2196-26926-0x0000000006F30000-0x0000000006FD4000-memory.dmp

                memory/2196-26339-0x000000006FB40000-0x000000006FB8C000-memory.dmp

                memory/2196-7902-0x0000000005780000-0x00000000057E6000-memory.dmp

                memory/2196-28799-0x0000000007800000-0x0000000007E7A000-memory.dmp

                memory/2196-29323-0x00000000071B0000-0x00000000071CA000-memory.dmp

                memory/4628-6991-0x0000000004FA0000-0x00000000055CA000-memory.dmp

                memory/4628-6990-0x0000000004930000-0x0000000004966000-memory.dmp