Analysis

  • max time kernel
    93s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/01/2025, 10:29

General

  • Target
    c8228b107dfad48c1a7de8147fa1f6e4.exe
  • Size 1.8MB
  • Sample250101-mjfvmsvmcl
  • SHA256 8d0c8954abeaa3c75c922544e9798171de09868a3a1f9300e07465672ada3da4
  • 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 18 IoCs

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

  • 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.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 31 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\c8228b107dfad48c1a7de8147fa1f6e4.exe
    "C:\Users\Admin\AppData\Local\Temp\c8228b107dfad48c1a7de8147fa1f6e4.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3188
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\cNeeds\cData\o4e4cli\f5Mb10zb.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\cNeeds\cData\o4e4cli\f5Mb10zb.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1264
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\mshypercomponentSavesdll\kNSe5xQ3wI9ft6pWJZ9EeFYPDfgbdbVMsQk13JHxpBJ7xdPC40.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1160
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\mshypercomponentSavesdll\1fgSUpJ8Uk5BF.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:656
          • C:\mshypercomponentSavesdll\agentFont.exe
            "C:\mshypercomponentSavesdll/agentFont.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • 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:4736
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Registration\RuntimeBroker.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:4740
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\smss.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:1512
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\TextInputHost.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:5100
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\mshypercomponentSavesdll\SppExtComObj.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:1248
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\mshypercomponentSavesdll\Idle.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:2904
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\mshypercomponentSavesdll\agentFont.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious use of AdjustPrivilegeToken
              PID:2492
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MzNrUDcuj9.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3644
              • C:\Windows\system32\chcp.com
                chcp 65001
                7⤵
                  PID:5016
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  7⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:4556
                • C:\mshypercomponentSavesdll\Idle.exe
                  "C:\mshypercomponentSavesdll\Idle.exe"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4264
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\Registration\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\Registration\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1832
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Windows\Registration\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2216
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2544
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4332
    • 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
      • Scheduled Task/Job: Scheduled Task
      PID:1212
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 11 /tr "'C:\mshypercomponentSavesdll\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\mshypercomponentSavesdll\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2172
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 14 /tr "'C:\mshypercomponentSavesdll\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1168
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\mshypercomponentSavesdll\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5104
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\mshypercomponentSavesdll\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\mshypercomponentSavesdll\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2848
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "agentFonta" /sc MINUTE /mo 14 /tr "'C:\mshypercomponentSavesdll\agentFont.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2176
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "agentFont" /sc ONLOGON /tr "'C:\mshypercomponentSavesdll\agentFont.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "agentFonta" /sc MINUTE /mo 11 /tr "'C:\mshypercomponentSavesdll\agentFont.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4408

    Network

          MITRE ATT&CK Enterprise v15

          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 063bb7675f043bb4c1d78d5dc04801560331b0e430e7579d3a535740c539590f
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010
          • MD5 SHA1 SHA512

          MzNrUDcuj9.bat

          • Path C:\Users\Admin\AppData\Local\Temp\MzNrUDcuj9.bat
          • Size 164B
          • SHA256 defedacf800142e4ec5569157936f77528722e971a3fb1074243442bbfa57f0f
          • MD5 SHA1 SHA512

          f5Mb10zb.exe

          • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\cNeeds\cData\o4e4cli\f5Mb10zb.exe
          • Size 3.4MB
          • SHA256 6f91bdcd3c2805d9d4a8577e58e6c5b4b09c05316fb2d30da531dd2422a7cae1
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_ur321ikn.vym.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ur321ikn.vym.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          1fgSUpJ8Uk5BF.bat

          • Path C:\mshypercomponentSavesdll\1fgSUpJ8Uk5BF.bat
          • Size 81B
          • SHA256 946525adea7b1163ef9801b9ced0af00096159e968c3cccf3fe9f85003994b2b
          • MD5 SHA1 SHA512

          agentFont.exe

          • Path C:\mshypercomponentSavesdll\agentFont.exe
          • Size 3.1MB
          • SHA256 23dfbd08fca53dcb25b0f76b6d24abf02eb2349bc43c975bacd3776b52241faf
          • MD5 SHA1 SHA512 SSDEEP

          kNSe5xQ3wI9ft6pWJZ9EeFYPDfgbdbVMsQk13JHxpBJ7xdPC40.vbe

          • Path C:\mshypercomponentSavesdll\kNSe5xQ3wI9ft6pWJZ9EeFYPDfgbdbVMsQk13JHxpBJ7xdPC40.vbe
          • Size 212B
          • SHA256 cfe1d4e4f8c609281567bcba5cc5117fa957d53721b817f979092dec7fc44852
          • MD5 SHA1 SHA512

          memory/2904-65-0x0000015823800000-0x0000015823822000-memory.dmp

          memory/4736-30-0x0000000002710000-0x000000000271C000-memory.dmp

          memory/4736-28-0x0000000000F10000-0x0000000000F1C000-memory.dmp

          memory/4736-26-0x0000000000F00000-0x0000000000F0E000-memory.dmp

          memory/4736-24-0x0000000000470000-0x0000000000622000-memory.dmp