Overview

overview

10

Static

static

10

DCRatBuild.exe

windows7-x64

10

DCRatBuild.exe

windows10-2004-x64

10

Resubmissions

16/11/2024, 10:34

241116-ml8y7sylen10

16/11/2024, 10:32

241116-mlb98svdnd10

15/11/2024, 09:16

241115-k8ww2s1mhz10

15/11/2024, 09:13

241115-k63xkswjak

30/10/2024, 05:17

241030-fy5nzsxejq10

21/07/2024, 18:09

240721-wrvs7syckf10

21/07/2024, 14:26

240721-rsar7svhpj10

Analysis

  • max time kernel
    36s
  • max time network
    37s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/11/2024, 10:32

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    DCRatBuild.exe
  • Size 1.1MB
  • Sample241116-mlb98svdnd
  • SHA256 d9cbcae95ae824014b6d2fd6d3269b00b09ab84ed44b45b21c0b1842e7cdc132
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
dcratdiscoveryinfostealerpersistencerat

Malware Config

Signatures

  • DcRat

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

    ratinfostealerdcrat
  • Dcrat family
    dcrat
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
    persistence
  • Process spawned unexpected child process 6 IoCs

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

  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

    rat
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Drops file in Program Files directory 3 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.

    discovery
  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe
    "C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3344
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\PortproviderRuntime\2jiE6dDNxF2hUpVE5Z.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4428
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\PortproviderRuntime\OI2YygSphQCiiCNA7ofzvo.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:740
        • C:\PortproviderRuntime\Bridgewebsvc.exe
          "C:\PortproviderRuntime\Bridgewebsvc.exe"
          4⤵
          • Modifies WinLogon for persistence
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3392
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ZEdnyHxDOI.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:4576
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:3948
              • C:\PortproviderRuntime\RuntimeBroker.exe
                "C:\PortproviderRuntime\RuntimeBroker.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3872
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2732
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Internet Explorer\SIGNUP\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2368
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\PortproviderRuntime\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\PortproviderRuntime\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5024
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\PortproviderRuntime\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3608

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          2jiE6dDNxF2hUpVE5Z.vbe
          • Path C:\PortproviderRuntime\2jiE6dDNxF2hUpVE5Z.vbe
          • Size 218B
          • SHA256 2e118668b3c63457b924aafd6b402e105477030d6157e3d66ba8ba7acad58dcf
          • MD5 SHA1 SHA512
          Submit Download

          Bridgewebsvc.exe
          • Path C:\PortproviderRuntime\Bridgewebsvc.exe
          • Size 828KB
          • SHA256 f014b4dd1600fb5ecd92de55165573415c2d7ee184a4f70f2f975ee7909150f6
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          OI2YygSphQCiiCNA7ofzvo.bat
          • Path C:\PortproviderRuntime\OI2YygSphQCiiCNA7ofzvo.bat
          • Size 41B
          • SHA256 d4fa2e3203a21efd9f46fd9ea5fcedbabe13bd9a2bc93d0169070507380bbf9b
          • MD5 SHA1 SHA512
          Submit Download

          ZEdnyHxDOI.bat
          • Path C:\Users\Admin\AppData\Local\Temp\ZEdnyHxDOI.bat
          • Size 205B
          • SHA256 2057dede2320c0f93e20076a57193ba5c4c38ed791cfdb3b7f3bf38b42b56bea
          • MD5 SHA1 SHA512
          Submit Download

          memory/3392-12-0x00007FFC49BF0000-0x00007FFC49EB9000-memory.dmp
          Download

          memory/3392-13-0x00000000003F0000-0x00000000004C6000-memory.dmp
          Download

          memory/3392-23-0x00007FFC49BF0000-0x00007FFC49EB9000-memory.dmp
          Download