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Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/01/2024, 07:14

General

  • Target

    52e0c294963f6cd10e3104901c936a3e.exe

  • Size

    2.0MB

  • MD5

    52e0c294963f6cd10e3104901c936a3e

  • SHA1

    fa78c9a910b904cfc412cef1b422934243f6f0ff

  • SHA256

    77d8062a27308c826de456d4e430ebcfb9315f87ae792bb23d8f21365c8b4fe7

  • SHA512

    972bb0dbd66f984c41b64c09ff84fef138714929b13db0f03ca2e5257d92664dcf4fcf6d7e6fc99894b664bb9acbbbe5598787a2d10bf4e8d074dfd0487c5f3b

  • SSDEEP

    49152:n0Le0UIxHI38h4kbJA9GOErel2MaHBKljpsREsSSUOmLY5sVQQ:ChJsIJAIMnaHBKcRoOusQ

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 20 IoCs

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

  • DCRat payload 12 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 4 IoCs
  • Checks BIOS information in registry 2 TTPs 8 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Identifies Wine through registry keys 2 TTPs 4 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Adds Run key to start application 2 TTPs 20 IoCs
  • Drops file in System32 directory 15 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 20 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 20 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\52e0c294963f6cd10e3104901c936a3e.exe
    "C:\Users\Admin\AppData\Local\Temp\52e0c294963f6cd10e3104901c936a3e.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks computer location settings
    • Identifies Wine through registry keys
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2308
    • C:\Users\Admin\AppData\Local\Temp\52e0c294963f6cd10e3104901c936a3e.exe
      "C:\Users\Admin\AppData\Local\Temp\52e0c294963f6cd10e3104901c936a3e.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Checks computer location settings
      • Identifies Wine through registry keys
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:392
      • C:\Users\Admin\AppData\Local\Temp\52e0c294963f6cd10e3104901c936a3e.exe
        "C:\Users\Admin\AppData\Local\Temp\52e0c294963f6cd10e3104901c936a3e.exe"
        3⤵
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Checks computer location settings
        • Identifies Wine through registry keys
        • Adds Run key to start application
        • Drops file in System32 directory
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1016
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\SlE2NiNjRg.bat"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2756
          • C:\Users\Public\Libraries\explorer.exe
            "C:\Users\Public\Libraries\explorer.exe"
            5⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Identifies Wine through registry keys
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3780
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\Prefetch\ReadyBoot\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3184
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\RADCUI\sihost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4912
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\ntshrui\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:5092
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\KBDLA\taskhostw.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2756
    • C:\Windows\SysWOW64\w32tm.exe
      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1480
    • C:\Windows\SysWOW64\chcp.com
      chcp 65001
      2⤵
        PID:884
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "52e0c294963f6cd10e3104901c936a3e" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\chrome_installer\52e0c294963f6cd10e3104901c936a3e.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2100
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\msafd\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Documents and Settings\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\ttdplm\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2732
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Admin\3D Objects\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3436
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Public\Videos\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1504
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\IdentityCRL\production\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3236
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\PerfLogs\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:928
    • C:\Windows\system32\w32tm.exe
      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
      1⤵
        PID:4676
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\wbemcntl\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4952
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:116
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\AppExtension\dwm.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3232
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Public\Libraries\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2040
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4508

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Windows\SysWOW64\RADCUI\sihost.exe

        Filesize

        92KB

        MD5

        28ce31ec8914f27613403c4243797333

        SHA1

        7aecf31733f5da4b4f8f2d6b92effa245c20b58f

        SHA256

        20091169559621418fd07e5a15dd7a8c1e942fc8c592a7eeb86696f859d5f2a5

        SHA512

        76178a8670c576ae6e9a6bb89a761181f3b469d497229cd932082cc927a5644382148523071348a0d6f26f7483058678ae1420602fe28a934efa40ba24418afa

      • memory/392-24-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/392-46-0x00000000747F0000-0x0000000074FA0000-memory.dmp

        Filesize

        7.7MB

      • memory/392-45-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/392-29-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/392-32-0x0000000005630000-0x0000000005640000-memory.dmp

        Filesize

        64KB

      • memory/392-31-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/392-30-0x00000000747F0000-0x0000000074FA0000-memory.dmp

        Filesize

        7.7MB

      • memory/1016-73-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/1016-43-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/1016-74-0x00000000747F0000-0x0000000074FA0000-memory.dmp

        Filesize

        7.7MB

      • memory/1016-47-0x00000000747F0000-0x0000000074FA0000-memory.dmp

        Filesize

        7.7MB

      • memory/1016-50-0x0000000003600000-0x0000000003610000-memory.dmp

        Filesize

        64KB

      • memory/1016-48-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/1016-49-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/2308-4-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/2308-0-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/2308-10-0x0000000005B90000-0x0000000005BF6000-memory.dmp

        Filesize

        408KB

      • memory/2308-2-0x0000000074750000-0x0000000074F00000-memory.dmp

        Filesize

        7.7MB

      • memory/2308-1-0x00000000778D4000-0x00000000778D6000-memory.dmp

        Filesize

        8KB

      • memory/2308-5-0x0000000006040000-0x00000000065E4000-memory.dmp

        Filesize

        5.6MB

      • memory/2308-6-0x0000000005940000-0x00000000059DC000-memory.dmp

        Filesize

        624KB

      • memory/2308-7-0x00000000059F0000-0x0000000005A00000-memory.dmp

        Filesize

        64KB

      • memory/2308-27-0x0000000074750000-0x0000000074F00000-memory.dmp

        Filesize

        7.7MB

      • memory/2308-3-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/2308-26-0x0000000000EC0000-0x0000000001312000-memory.dmp

        Filesize

        4.3MB

      • memory/3780-78-0x0000000000920000-0x0000000000D72000-memory.dmp

        Filesize

        4.3MB

      • memory/3780-81-0x0000000000920000-0x0000000000D72000-memory.dmp

        Filesize

        4.3MB

      • memory/3780-82-0x0000000005A10000-0x0000000005A20000-memory.dmp

        Filesize

        64KB

      • memory/3780-80-0x0000000074750000-0x0000000074F00000-memory.dmp

        Filesize

        7.7MB

      • memory/3780-79-0x0000000000920000-0x0000000000D72000-memory.dmp

        Filesize

        4.3MB

      • memory/3780-85-0x0000000000920000-0x0000000000D72000-memory.dmp

        Filesize

        4.3MB

      • memory/3780-86-0x0000000074750000-0x0000000074F00000-memory.dmp

        Filesize

        7.7MB