Analysis

  • max time kernel
    120s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 9 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.

  • 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 46 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⤵
    • Suspicious use of WriteProcessMemory
    PID:2228
    • 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⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2480
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\mshypercomponentSavesdll\kNSe5xQ3wI9ft6pWJZ9EeFYPDfgbdbVMsQk13JHxpBJ7xdPC40.vbe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2852
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\mshypercomponentSavesdll\1fgSUpJ8Uk5BF.bat" "
          4⤵
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2884
          • C:\mshypercomponentSavesdll\agentFont.exe
            "C:\mshypercomponentSavesdll/agentFont.exe"
            5⤵
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2864
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Internet Explorer\SIGNUP\OSPPSVC.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2308
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Google\dllhost.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2968
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\csrss.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2984
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Defender\cmd.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2040
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Photo Viewer\es-ES\lsass.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1272
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" -Command Add-MpPreference -ExclusionPath 'C:\mshypercomponentSavesdll\agentFont.exe'
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1300
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\zOr3JDizLl.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:556
              • C:\Windows\system32\chcp.com
                chcp 65001
                7⤵
                  PID:2152
                • C:\Windows\system32\w32tm.exe
                  w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                  7⤵
                    PID:1516
                  • C:\Program Files\Windows Defender\cmd.exe
                    "C:\Program Files\Windows Defender\cmd.exe"
                    7⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2332
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\OSPPSVC.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2432
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\OSPPSVC.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1924
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\OSPPSVC.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1396
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files\Google\dllhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2428
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Google\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2008
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Program Files\Google\dllhost.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 "csrssc" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\csrss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:320
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1008
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1824
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Defender\cmd.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1340
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\cmd.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2836
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Defender\cmd.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2668
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\lsass.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2260
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\es-ES\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1968
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2124
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "agentFonta" /sc MINUTE /mo 9 /tr "'C:\mshypercomponentSavesdll\agentFont.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2316
      • 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:2844
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "agentFonta" /sc MINUTE /mo 8 /tr "'C:\mshypercomponentSavesdll\agentFont.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2380

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            f5Mb10zb.exe

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

            zOr3JDizLl.bat

            • Path C:\Users\Admin\AppData\Local\Temp\zOr3JDizLl.bat
            • Size 217B
            • SHA256 53e97a117f9e55856962c42f7d63067dbd15b768032567e82be996a21d809c94
            • MD5 SHA1 SHA512

            18DKISBLEIOYRSVKUSOX.temp

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\18DKISBLEIOYRSVKUSOX.temp
            • Size 7KB
            • SHA256 ed5b30c7d7ffb9d11d35d332e615cb093e9564681e3a5d0d7d142c46f2accbeb
            • MD5 SHA1 SHA512 SSDEEP

            1fgSUpJ8Uk5BF.bat

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

            kNSe5xQ3wI9ft6pWJZ9EeFYPDfgbdbVMsQk13JHxpBJ7xdPC40.vbe

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

            agentFont.exe

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

            memory/1300-76-0x00000000023C0000-0x00000000023C8000-memory.dmp

            memory/2332-80-0x0000000000B90000-0x0000000000D42000-memory.dmp

            memory/2864-31-0x0000000000420000-0x000000000042C000-memory.dmp

            memory/2864-33-0x0000000000430000-0x000000000043C000-memory.dmp

            memory/2864-29-0x00000000003F0000-0x00000000003FE000-memory.dmp

            memory/2864-27-0x0000000000DB0000-0x0000000000F62000-memory.dmp

            memory/2968-75-0x000000001B5F0000-0x000000001B8D2000-memory.dmp