Overview

overview

10

Static

static

10

DCRatBuild.exe

windows7-x64

10

DCRatBuild.exe

windows10-2004-x64

10

Resubmissions

16-11-2024 10:34

241116-ml8y7sylen 10

16-11-2024 10:32

241116-mlb98svdnd 10

15-11-2024 09:16

241115-k8ww2s1mhz 10

30-10-2024 05:17

241030-fy5nzsxejq 10

21-07-2024 18:09

240721-wrvs7syckf 10

21-07-2024 14:26

240721-rsar7svhpj 10

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

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Report Analysis Logs

General

  • Target

    DCRatBuild.exe

  • Size

    1.1MB

  • MD5

    7ef93a29c05d412dd2dc432e1aac54a9

  • SHA1

    776cc5c36f370a7e1fa840a21c13f2278723409e

  • SHA256

    d9cbcae95ae824014b6d2fd6d3269b00b09ab84ed44b45b21c0b1842e7cdc132

  • SHA512

    26e00619e47a130fb768b91074915c8a69f8690ac12465f21c1bd7e69f94ae6db9a238ff3c510a719cf1a318a07c80a543212c200b2b2152934a1ad154d13ab6

  • SSDEEP

    12288:URZ+IoG/n9IQxW3OBseUUT+tcYbv+RK+UfXST5/rKMyFckcb8M41AT0z/GAFPz3m:u2G/nvxW3WieC7STuMMATKPTVgxr4q

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

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    Downloads

    • C:\PortproviderRuntime\2jiE6dDNxF2hUpVE5Z.vbe
      Filesize

      218B

      MD5

      413767cf51f36f7f50d9430d73ea0bb1

      SHA1

      4469733bce94a114c836ea3591dccb3e689782c7

      SHA256

      2e118668b3c63457b924aafd6b402e105477030d6157e3d66ba8ba7acad58dcf

      SHA512

      3c12a46412227f57f8aa815b0b7820ca54eb3fa7a033ea7baa7efad7526755db7998d843a6790880efa87b841e9c6085b793930ae865c2694c8385e5937ee900

      Download Submit

    • C:\PortproviderRuntime\Bridgewebsvc.exe
      Filesize

      828KB

      MD5

      fddea23e803e9e5de212e4c0475c8f93

      SHA1

      c4426bf36ce54917155da2bfbec1508c5a799664

      SHA256

      f014b4dd1600fb5ecd92de55165573415c2d7ee184a4f70f2f975ee7909150f6

      SHA512

      05459fc75998ee306e8de7e544aaf744e5c6e1930dcb7e02b94a566a7ad6e874a9fe50a78a1da50b4e7110282e49353f8ced586117d772b600b84d09ee070591

      Download Submit

    • C:\PortproviderRuntime\OI2YygSphQCiiCNA7ofzvo.bat
      Filesize

      41B

      MD5

      863d81db66a0a5864890665ea50c23c5

      SHA1

      f5a584f4ee5e390b667eaa5e5d9332251388fa7e

      SHA256

      d4fa2e3203a21efd9f46fd9ea5fcedbabe13bd9a2bc93d0169070507380bbf9b

      SHA512

      ecb8ff338e0febcfe8965516a58dcdcd63420592467ce1c281f7ccacf7a2ca02bd7a73d52208e98edec3e73ea69477f3ccaa4ddf4b0608e5598a92e110e5d3b0

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\ZEdnyHxDOI.bat
      Filesize

      205B

      MD5

      7b2cdab8658b61c32110d7b69414b3dd

      SHA1

      073343d2263cbaef3620da605a608f6df2ba7a4c

      SHA256

      2057dede2320c0f93e20076a57193ba5c4c38ed791cfdb3b7f3bf38b42b56bea

      SHA512

      1e052b0b65fcefe6bb426c00155eabe367750e82b6e0dc8f4b3843e8c734c3e8764de2c3522eccb138ce0b9bc5b96c77c2ecc2badafc7b1dd298830c175baf39

      Download Submit

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

      Filesize

      2.8MB

      Download

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

      Filesize

      856KB

      Download

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

      Filesize

      2.8MB

      Download