Analysis

  • max time kernel
    142s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-05-2024 18:53

General

  • Target

    149525b397dd4f1bb68edd6eb750b0cd400a36a265766b6eab14daff8d446da0.exe

  • Size

    1.7MB

  • MD5

    2654ed21f41ddf23c0bcad4b7fe550e1

  • SHA1

    55191e232ee3851a66f264cc3f163a5a14c84843

  • SHA256

    149525b397dd4f1bb68edd6eb750b0cd400a36a265766b6eab14daff8d446da0

  • SHA512

    748d64575954c442b1a261a8b647b4dd9af93b42382bb227972c977818ed155bc93a8afc1e7e7edcf62da32877581fb9a42b87521bc849be45a27711639a0c2d

  • SSDEEP

    24576:w2G/nvxW3WieChFP0UI2K/L7OXxfeacboEkAGpkXqde7u0GUzzGQYpXTcviXSzDI:wbA3jYUI2JX68Ncu0fnS5yiXSzD

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 21 IoCs

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

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in System32 directory 11 IoCs
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 21 IoCs

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

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 27 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\149525b397dd4f1bb68edd6eb750b0cd400a36a265766b6eab14daff8d446da0.exe
    "C:\Users\Admin\AppData\Local\Temp\149525b397dd4f1bb68edd6eb750b0cd400a36a265766b6eab14daff8d446da0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4780
    • C:\Users\Admin\AppData\Local\Temp\dcrat3.exe
      "C:\Users\Admin\AppData\Local\Temp\dcrat3.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4804
      • C:\Program Files\Java\jre-1.8\bin\javaw.exe
        "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -Dprism.dirtyopts=false -Dfile.encoding=UTF-8 -classpath " org.develnext.jphp.ext.javafx.FXLauncher
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1784
        • C:\Windows\system32\icacls.exe
          C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
          4⤵
          • Modifies file permissions
          PID:1856
    • C:\Users\Admin\AppData\Local\Temp\dcrat1.exe
      "C:\Users\Admin\AppData\Local\Temp\dcrat1.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3524
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Windows\System32\Microsoft\Protect\S-1-5-18\User\wozFTjVIuw5Ij.vbe"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3252
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Windows\System32\Microsoft\Protect\S-1-5-18\User\6AixvTBYkcX8JRK4xN.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3064
          • C:\Windows\SysWOW64\Microsoft\Protect\S-1-5-18\User\dwm.exe
            "C:\\Windows\System32\Microsoft\Protect\S-1-5-18\User\dwm.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:832
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\mljoRSYxag.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1384
              • C:\Windows\system32\w32tm.exe
                w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                7⤵
                  PID:1268
                • C:\odt\winlogon.exe
                  "C:\odt\winlogon.exe"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4544
            • C:\Windows\SysWOW64\reg.exe
              reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
              5⤵
              • Modifies registry key
              PID:2880
    • 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=3756 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:4560
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 9 /tr "'C:\Windows\L2Schemas\msedge.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4836
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedge" /sc ONLOGON /tr "'C:\Windows\L2Schemas\msedge.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3824
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 12 /tr "'C:\Windows\L2Schemas\msedge.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3444
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 7 /tr "'C:\Program Files\VideoLAN\VLC\locale\ca\LC_MESSAGES\SearchApp.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:2376
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Program Files\VideoLAN\VLC\locale\ca\LC_MESSAGES\SearchApp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:748
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 14 /tr "'C:\Program Files\VideoLAN\VLC\locale\ca\LC_MESSAGES\SearchApp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3328
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 13 /tr "'C:\odt\winlogon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4496
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\odt\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:5068
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 7 /tr "'C:\odt\winlogon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4828
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1000
      • 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
        • Creates scheduled task(s)
        PID:556
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3592
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\Idle.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:812
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4548
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4780
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\sihost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:4388
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:916
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Photo Viewer\fr-FR\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3296
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Users\All Users\USOShared\Logs\lsass.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3228
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\All Users\USOShared\Logs\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:3996
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\USOShared\Logs\lsass.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Creates scheduled task(s)
        PID:1452

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\dcrat1.exe

        Filesize

        1.6MB

        MD5

        81e978a9392b56444619c5fc28bcf0b0

        SHA1

        cf322f5be4a9c3fad09714a1efb7e730ba977c40

        SHA256

        70eae81f9363375c7301e4d48a7c5bc5588a9100cbd300eb358fed2327c40dbe

        SHA512

        370e4faf61c93d47b3e60196fc1f8c17de35b076b383566a817c5a2358396dd6a7dc5677b86115cd61d413e4c717ddc5c426aaa2590f47b63643bbfab148d76c

      • C:\Users\Admin\AppData\Local\Temp\dcrat3.exe

        Filesize

        72KB

        MD5

        2c7d37e90dd8ab57d06dad5bc7956885

        SHA1

        da789c107c4c68b8250b6589e45e5a3cf7a9a143

        SHA256

        5ede5d774ab65f25357cf5a1fa5e354f6f2a9868651a0fa717485802b21b1939

        SHA512

        e74ae891771bfd9c6fcdfbe8e4f33f0d5f7c3457cd84b257500cdaf8fa8b16fe458a18db9b3a60591465982fc2871f4c3f2e7541c765f00a0516f805e7e9ca0f

      • C:\Users\Admin\AppData\Local\Temp\mljoRSYxag.bat

        Filesize

        184B

        MD5

        3adcf57e62576707b7515ddf1a315eb7

        SHA1

        170ba54762bdee18e604dcc827607d9e1485f796

        SHA256

        08e3a2fd20cc880de4c7f9f1e2cd88a8ebdbdb7d38f2620dbd3c1f62c4b09f49

        SHA512

        c4b38fc7517818d3f56bfd2108799dccb331f7395a3b70fc7bc2a6cf2a5906cde006a547fdcc2e641f935d0ba89423668851d0837e06358650463e078d5b9dcb

      • C:\Windows\SysWOW64\Microsoft\Protect\S-1-5-18\User\6AixvTBYkcX8JRK4xN.bat

        Filesize

        174B

        MD5

        d140d65ea96f1a8e52a20c00b8092225

        SHA1

        4f7831d9ee21770079e91f083b8c4ce77a544695

        SHA256

        2dc114e83c3e2339c249a58648875ec0988dec9158ab35cbfe9cff50171ae3ac

        SHA512

        4c0539d4584d7814ea3c73b771a80321fc58208e9a122f29129898621d0dbe4de72c05100c9fac7f503b0b7a0ada4045cedd7fb9434bd904bb51b8b9a74f3830

      • C:\Windows\SysWOW64\Microsoft\Protect\S-1-5-18\User\dwm.exe

        Filesize

        1.3MB

        MD5

        6a052712569ad65c7bd5a0ffab54c051

        SHA1

        0dbff6cdf01b13465a729e2370cf2244fe5a0218

        SHA256

        ab64355e0ceb9e47a235a8f1be8d557d22e267521be47733d476f8004a3a69e0

        SHA512

        8875cd956120870a452dd85113e90cf3b3fe7132bf6b699caf9944a72b8700dced4e5e41e882c021b34a376fa645c2a841e454eba49bda684285512baaa91cda

      • C:\Windows\SysWOW64\Microsoft\Protect\S-1-5-18\User\wozFTjVIuw5Ij.vbe

        Filesize

        244B

        MD5

        30a1a984f3afcec8d166e9b90ae4dded

        SHA1

        5dd5a1fb85732376bcb5478e5f627d251ef79983

        SHA256

        6fc7d156666453ba430f30ea19b47c55a0bf88a7c1a8ce407322270e8f596929

        SHA512

        63e72a5178fbffda94382356177f07a0781bb4a597be67075395c3afe4002a9c186d5b5edb5b7e4bed6c38c8c8b06acc0c623a0ec963fa4216383a6112ffc768

      • memory/832-44-0x0000000000A00000-0x0000000000B50000-memory.dmp

        Filesize

        1.3MB

      • memory/832-50-0x000000001B750000-0x000000001B76C000-memory.dmp

        Filesize

        112KB

      • memory/832-55-0x0000000002E60000-0x0000000002E6E000-memory.dmp

        Filesize

        56KB

      • memory/832-54-0x000000001C4E0000-0x000000001CA08000-memory.dmp

        Filesize

        5.2MB

      • memory/832-53-0x0000000002E50000-0x0000000002E62000-memory.dmp

        Filesize

        72KB

      • memory/832-52-0x0000000002E30000-0x0000000002E46000-memory.dmp

        Filesize

        88KB

      • memory/832-51-0x000000001BD10000-0x000000001BD60000-memory.dmp

        Filesize

        320KB

      • memory/1784-49-0x000002BE01410000-0x000002BE01680000-memory.dmp

        Filesize

        2.4MB

      • memory/1784-23-0x000002BE01410000-0x000002BE01680000-memory.dmp

        Filesize

        2.4MB

      • memory/1784-48-0x000002BE7F640000-0x000002BE7F641000-memory.dmp

        Filesize

        4KB

      • memory/1784-45-0x000002BE7F640000-0x000002BE7F641000-memory.dmp

        Filesize

        4KB

      • memory/4780-0-0x0000000074FEE000-0x0000000074FEF000-memory.dmp

        Filesize

        4KB

      • memory/4780-2-0x0000000005340000-0x00000000053DC000-memory.dmp

        Filesize

        624KB

      • memory/4780-1-0x0000000000760000-0x000000000091C000-memory.dmp

        Filesize

        1.7MB

      • memory/4804-12-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB