Analysis

  • max time kernel
    153s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/06/2024, 01:22

General

  • Target
    68b58f037c9ef5103ffb728b4617db685539364b30a61c4749c4a126125a80be.exe
  • Size 1.6MB
  • Sample240627-brc8yavemf
  • SHA256 68b58f037c9ef5103ffb728b4617db685539364b30a61c4749c4a126125a80be
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

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 30 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.

  • Detects executables packed with SmartAssembly 2 IoCs
  • Checks computer location settings 2 TTPs 4 IoCs

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

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

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

  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 30 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\68b58f037c9ef5103ffb728b4617db685539364b30a61c4749c4a126125a80be.exe
    "C:\Users\Admin\AppData\Local\Temp\68b58f037c9ef5103ffb728b4617db685539364b30a61c4749c4a126125a80be.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1188
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\browserdriverintoCommon\AFx6bM1tT26gV8oG.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4892
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\browserdriverintoCommon\AWAbOEdAlbE8VKpl.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3532
        • C:\browserdriverintoCommon\hostPerf.exe
          "C:\browserdriverintoCommon\hostPerf.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4564
          • C:\Program Files\Google\Chrome\Application\SetupMetrics\sppsvc.exe
            "C:\Program Files\Google\Chrome\Application\SetupMetrics\sppsvc.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4444
            • C:\Windows\System32\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\0cb9f051-1cfb-4bb1-b6bc-84fe4a627c7c.vbs"
              6⤵
                PID:3492
              • C:\Windows\System32\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\1a7a7145-e62d-422f-963c-d2843436f93d.vbs"
                6⤵
                  PID:4432
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4140 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:3424
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "TrustedInstallerT" /sc MINUTE /mo 9 /tr "'C:\browserdriverintoCommon\TrustedInstaller.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:608
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "TrustedInstaller" /sc ONLOGON /tr "'C:\browserdriverintoCommon\TrustedInstaller.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4660
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "TrustedInstallerT" /sc MINUTE /mo 7 /tr "'C:\browserdriverintoCommon\TrustedInstaller.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:336
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\sppsvc.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4776
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:228
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\sppsvc.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4208
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 9 /tr "'C:\odt\unsecapp.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4356
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\odt\unsecapp.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4204
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 6 /tr "'C:\odt\unsecapp.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3596
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 10 /tr "'C:\odt\conhost.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4788
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\odt\conhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:908
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 14 /tr "'C:\odt\conhost.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4628
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\msedge.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2916
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedge" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4088
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3704
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\browserdriverintoCommon\csrss.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:864
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\browserdriverintoCommon\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2020
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\browserdriverintoCommon\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2276
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\odt\System.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3844
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\odt\System.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4696
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\odt\System.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4504
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 14 /tr "'C:\browserdriverintoCommon\msedge.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1116
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedge" /sc ONLOGON /tr "'C:\browserdriverintoCommon\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2208
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 11 /tr "'C:\browserdriverintoCommon\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3364
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3576
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2132
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2548
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\odt\sysmon.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:988
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\odt\sysmon.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3380
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 7 /tr "'C:\odt\sysmon.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1296
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1856

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              0cb9f051-1cfb-4bb1-b6bc-84fe4a627c7c.vbs

              • Path C:\Users\Admin\AppData\Local\Temp\0cb9f051-1cfb-4bb1-b6bc-84fe4a627c7c.vbs
              • Size 742B
              • SHA256 3f7cc61a9525419cc3bb08408dbef21607d4756c3a7b1c7638b8ed59dd7aaa16
              • MD5 SHA1 SHA512

              1a7a7145-e62d-422f-963c-d2843436f93d.vbs

              • Path C:\Users\Admin\AppData\Local\Temp\1a7a7145-e62d-422f-963c-d2843436f93d.vbs
              • Size 518B
              • SHA256 1efd733bb6edee400a28c675d68bc5b44847118e0a9a3136def9d9f4cb25fb95
              • MD5 SHA1 SHA512

              AFx6bM1tT26gV8oG.vbe

              • Path C:\browserdriverintoCommon\AFx6bM1tT26gV8oG.vbe
              • Size 216B
              • SHA256 5e43cf4ea507ab0d4de8e64a048bd9e6577acf30dcc5886337bc71bc50b6adb1
              • MD5 SHA1 SHA512

              AWAbOEdAlbE8VKpl.bat

              • Path C:\browserdriverintoCommon\AWAbOEdAlbE8VKpl.bat
              • Size 41B
              • SHA256 22bb0731374e4d4df17c1246c4b46328f086a24b7d2fbc46b1740ed9922ab483
              • MD5 SHA1 SHA512

              hostPerf.exe

              • Path C:\browserdriverintoCommon\hostPerf.exe
              • Size 1.3MB
              • SHA256 7b332c9ae15219490ae6cd4099c00ec77e01e9f321b21bbf61e163f78ef9b78d
              • MD5 SHA1 SHA512 SSDEEP

              memory/4564-18-0x0000000000BC0000-0x0000000000BC8000-memory.dmp

              memory/4564-15-0x0000000000B80000-0x0000000000B9C000-memory.dmp

              memory/4564-16-0x0000000000BF0000-0x0000000000C40000-memory.dmp

              memory/4564-14-0x0000000000B70000-0x0000000000B7E000-memory.dmp

              memory/4564-19-0x0000000000BD0000-0x0000000000BDC000-memory.dmp

              memory/4564-17-0x0000000000BA0000-0x0000000000BB6000-memory.dmp

              memory/4564-22-0x0000000000C50000-0x0000000000C5C000-memory.dmp

              memory/4564-21-0x0000000000C40000-0x0000000000C48000-memory.dmp

              memory/4564-20-0x0000000000BE0000-0x0000000000BEA000-memory.dmp

              memory/4564-13-0x00000000000F0000-0x000000000024C000-memory.dmp

              memory/4564-12-0x00007FF8A1783000-0x00007FF8A1785000-memory.dmp