Analysis

  • max time kernel
    139s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 13:39

General

  • Target

    439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.exe

  • Size

    829KB

  • MD5

    3bd8d1abdfdf35856a1b35c6824bd6f2

  • SHA1

    3e6e83f044690b2e5ffec74ebdef0ec9d4e8a02b

  • SHA256

    439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4

  • SHA512

    11387da3bb436ce4968eeaa03d0880b2eaa5cba780a8e393c060b0828e187d9527c24dd545f8fe3f8ad02a834cc0831d78d70e823047bf758ba42da01e0fc797

  • SSDEEP

    12288:Qu1cCMKdiaT3Ok1MVBFdpkj6fe9BSbwfKyw8:VOlKUaT3O7VBFdpLWQEfKyP

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 27 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 13 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 27 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 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\439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.exe
    "C:\Users\Admin\AppData\Local\Temp\439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.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:1972
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\rhhPZ95vdJ.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3540
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:1716
        • C:\odt\taskhostw.exe
          "C:\odt\taskhostw.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4032
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 9 /tr "'C:\odt\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2156
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\odt\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\odt\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2120
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Program Files\MsEdgeCrashpad\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\MsEdgeCrashpad\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 7 /tr "'C:\Program Files\MsEdgeCrashpad\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1912
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Program Files\Uninstall Information\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2432
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1680
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4568
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2388
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 6 /tr "'C:\odt\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3612
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\odt\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1548
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 9 /tr "'C:\odt\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4300
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3420
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2044
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2276
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Windows\debug\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4296
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\debug\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4908
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Windows\debug\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2480
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3580
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5080
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3928
    • 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=4204 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:4268

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\rhhPZ95vdJ.bat

        Filesize

        185B

        MD5

        a6f2a59b1d904cff8d0582c3219682d0

        SHA1

        3cf1b1a6d16bc2da8805742fd8f6c74c29694ec1

        SHA256

        14b8bbce36ce5f8e9c540be631a0569385fb6cbdb92df2fe99516dcd67586594

        SHA512

        323a9b81847016ac21d48b816a3a5f129f5264e6399b9a41d2a6aa782e46e430e57aa9aa68f836c54f772cd7cca79ca0a77feebf54e106287b63454ee13269cf

      • C:\odt\taskhostw.exe

        Filesize

        829KB

        MD5

        3bd8d1abdfdf35856a1b35c6824bd6f2

        SHA1

        3e6e83f044690b2e5ffec74ebdef0ec9d4e8a02b

        SHA256

        439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4

        SHA512

        11387da3bb436ce4968eeaa03d0880b2eaa5cba780a8e393c060b0828e187d9527c24dd545f8fe3f8ad02a834cc0831d78d70e823047bf758ba42da01e0fc797

      • memory/1972-0-0x00007FFE5FD43000-0x00007FFE5FD45000-memory.dmp

        Filesize

        8KB

      • memory/1972-1-0x0000000000030000-0x0000000000106000-memory.dmp

        Filesize

        856KB

      • memory/1972-2-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp

        Filesize

        10.8MB

      • memory/1972-27-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp

        Filesize

        10.8MB