Analysis

  • max time kernel
    136s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-06-2024 01:09

General

  • Target

    2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17.exe

  • Size

    827KB

  • MD5

    33ab5cbb351fa75f5d4f3e3b5aa064a9

  • SHA1

    ac9bcf69aecff1ff5d4108df204a4a2b572e1eef

  • SHA256

    2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17

  • SHA512

    4e62650b49ae86c152463742a04980627d54dc8efc7dd3443625210d13db815f279989d846bbca4376cd127595403cfd53160c0fa78f3d198bf400da5655a98e

  • SSDEEP

    12288:6HggW+CSPHjaphInx+6XlRitt/tNRWCkQu:6AgW+C4jaqZlR4/jRWCkT

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 12 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 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\2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17.exe
    "C:\Users\Admin\AppData\Local\Temp\2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17.exe"
    1⤵
    • Checks computer location settings
    • 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:4568
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\5bdeYQE4Pv.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4564
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:3376
        • C:\Windows\Containers\serviced\RuntimeBroker.exe
          "C:\Windows\Containers\serviced\RuntimeBroker.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:4900
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Mail\MusNotification.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4724
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotification" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\MusNotification.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:216
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Mail\MusNotification.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 "upfcu" /sc MINUTE /mo 8 /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:224
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Windows\Globalization\Time Zone\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4504
    • 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
      • Scheduled Task/Job: Scheduled Task
      PID:2464
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:924
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\Containers\serviced\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5052
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\Containers\serviced\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3472
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Windows\Containers\serviced\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4112
    • 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 --field-trial-handle=4076,i,1236064252342462940,13180713657498721890,262144 --variations-seed-version --mojo-platform-channel-handle=1284 /prefetch:8
      1⤵
        PID:3492

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\5bdeYQE4Pv.bat
        Filesize

        213B

        MD5

        fa9172111cea454fbeccea153941b210

        SHA1

        ce0020963f3c1f612989e3d362791708845a2172

        SHA256

        eb8ce3485117df88cd1e4ed65373d4a6a6fd8aef502fddbc62b33f5e591a4dc9

        SHA512

        b4218245ba92caf2558a1235d08333e4931fa07f4261584371dd290111f0ecd28fa72a283aa6eabefda44a938067e8654e5b4b3537ee5ca5856bd0f3775a4abe

      • C:\Windows\Containers\serviced\RuntimeBroker.exe
        Filesize

        827KB

        MD5

        33ab5cbb351fa75f5d4f3e3b5aa064a9

        SHA1

        ac9bcf69aecff1ff5d4108df204a4a2b572e1eef

        SHA256

        2e2163fd9a3cf6e23a7b9509e64a877e5b6c5abf8537fe738466f83112539d17

        SHA512

        4e62650b49ae86c152463742a04980627d54dc8efc7dd3443625210d13db815f279989d846bbca4376cd127595403cfd53160c0fa78f3d198bf400da5655a98e

      • memory/4568-1-0x00007FF8F10D3000-0x00007FF8F10D5000-memory.dmp
        Filesize

        8KB

      • memory/4568-0-0x0000000000DB0000-0x0000000000E86000-memory.dmp
        Filesize

        856KB

      • memory/4568-4-0x00007FF8F10D0000-0x00007FF8F1B91000-memory.dmp
        Filesize

        10.8MB

      • memory/4568-17-0x00007FF8F10D0000-0x00007FF8F1B91000-memory.dmp
        Filesize

        10.8MB