Analysis

  • max time kernel
    105s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250610-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250610-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/07/2025, 15:00

General

  • Target
    68fc14c53a63137b72eabca5111774ce.exe
  • Size 2.8MB
  • Sample250728-sdmnwsfj91
  • SHA256 4534074d213942449c22ba14aa2d85c191f955606f70e875fbefda4358cda01b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • Process spawned unexpected child process 9 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • SmartAssembly .NET packer 5 IoCs

    Detects SmartAssembly .NET packer.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 9 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 10 IoCs
  • System policy modification 1 TTPs 6 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\68fc14c53a63137b72eabca5111774ce.exe
    "C:\Users\Admin\AppData\Local\Temp\68fc14c53a63137b72eabca5111774ce.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1960
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\68fc14c53a63137b72eabca5111774ce.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4596
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\f1ddd265ab0efea8c1b3\System.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4612
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\38ceab4228140811ed\wininit.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4608
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\spoolsv.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5040
    • C:\Users\All Users\spoolsv.exe
      "C:\Users\All Users\spoolsv.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:4092
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\f1ddd265ab0efea8c1b3\System.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2744
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\f1ddd265ab0efea8c1b3\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2828
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\f1ddd265ab0efea8c1b3\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4004
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\38ceab4228140811ed\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:392
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\38ceab4228140811ed\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\38ceab4228140811ed\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:5252
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2292
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3656

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 85f6b0971e94daf9fd4e39413824f162851a9f5ce7f989bd92c903a4dbcbef26
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 7305bcde3ba246a9b5c1666079c61596cc2ed2c651a1cd9e20557dba8a78c0e4
        • MD5 SHA1 SHA512

        RCXC43B.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\RCXC43B.tmp
        • Size 2.8MB
        • SHA256 4534074d213942449c22ba14aa2d85c191f955606f70e875fbefda4358cda01b
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_k1yej0nn.e1t.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k1yej0nn.e1t.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        System.exe

        • Path C:\f1ddd265ab0efea8c1b3\System.exe
        • Size 2.8MB
        • SHA256 43b878b75273866bc84708b754e90bbe6f603b27a1f98f17979e6a47a140d7a4
        • MD5 SHA1 SHA512 SSDEEP

        memory/1960-14-0x000000001B770000-0x000000001B77C000-memory.dmp

        memory/1960-20-0x000000001B9C0000-0x000000001B9CC000-memory.dmp

        memory/1960-8-0x000000001B060000-0x000000001B068000-memory.dmp

        memory/1960-9-0x000000001B070000-0x000000001B080000-memory.dmp

        memory/1960-10-0x000000001B080000-0x000000001B08A000-memory.dmp

        memory/1960-11-0x000000001B090000-0x000000001B0E6000-memory.dmp

        memory/1960-12-0x000000001B750000-0x000000001B75C000-memory.dmp

        memory/1960-13-0x000000001B760000-0x000000001B76C000-memory.dmp

        memory/1960-0-0x0000000000140000-0x000000000040E000-memory.dmp

        memory/1960-15-0x000000001B9F0000-0x000000001B9F8000-memory.dmp

        memory/1960-18-0x000000001B9A0000-0x000000001B9A8000-memory.dmp

        memory/1960-7-0x0000000000DB0000-0x0000000000DC6000-memory.dmp

        memory/1960-21-0x000000001B0E0000-0x000000001B0F0000-memory.dmp

        memory/1960-19-0x000000001B9B0000-0x000000001B9BC000-memory.dmp

        memory/1960-16-0x000000001B980000-0x000000001B98C000-memory.dmp

        memory/1960-17-0x000000001B990000-0x000000001B99E000-memory.dmp

        memory/1960-6-0x0000000000DA0000-0x0000000000DB0000-memory.dmp

        memory/1960-5-0x0000000000D90000-0x0000000000D98000-memory.dmp

        memory/1960-4-0x000000001B700000-0x000000001B750000-memory.dmp

        memory/1960-1-0x000000001B0E0000-0x000000001B0F0000-memory.dmp

        memory/1960-3-0x0000000000D70000-0x0000000000D8C000-memory.dmp

        memory/1960-2-0x0000000000D60000-0x0000000000D6E000-memory.dmp

        memory/4092-172-0x000000001BE40000-0x000000001BE96000-memory.dmp

        memory/4608-129-0x0000024CD13C0000-0x0000024CD13E2000-memory.dmp