Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-01-2025 15:35

General

  • Target

    68eedbe52fc64fb9ddf1538f4bf8f35f9c885dfa8dd7cfe7c4842df80cd14e26.exe

  • Size

    783KB

  • MD5

    eae6302bb231f178cee1470e3908d592

  • SHA1

    5b1a08b2db405f2b0fb84ea235325d2243e0239f

  • SHA256

    68eedbe52fc64fb9ddf1538f4bf8f35f9c885dfa8dd7cfe7c4842df80cd14e26

  • SHA512

    c6b0353cdcfc1db4ddf12379c699aa4d555cbdcc02e4f59cb7b5921165e99b1e9560a29c80a1e6a951759729b6f83c90331db34380984f399cb4b31163c7195f

  • SSDEEP

    12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqKS:m+OQbpbgsFdAyQvzSqaq8qx

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • Process spawned unexpected child process 7 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • 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
  • Adds Run key to start application 2 TTPs 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in System32 directory 8 IoCs
  • Drops file in Program Files directory 4 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 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 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\68eedbe52fc64fb9ddf1538f4bf8f35f9c885dfa8dd7cfe7c4842df80cd14e26.exe
    "C:\Users\Admin\AppData\Local\Temp\68eedbe52fc64fb9ddf1538f4bf8f35f9c885dfa8dd7cfe7c4842df80cd14e26.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • 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
    • System policy modification
    PID:2184
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\axZAxx7LlE.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2656
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2900
        • C:\ProgramData\Desktop\smss.exe
          "C:\ProgramData\Desktop\smss.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:2960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\ProgramData\Desktop\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-utility-l1-1-0\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Documents and Settings\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\AppxSignature\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4476
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\ProgramData\USOShared\Logs\User\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3076
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\takeown\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2128
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\mfc120fra\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4420

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\USOShared\Logs\User\SppExtComObj.exe

      Filesize

      783KB

      MD5

      eae6302bb231f178cee1470e3908d592

      SHA1

      5b1a08b2db405f2b0fb84ea235325d2243e0239f

      SHA256

      68eedbe52fc64fb9ddf1538f4bf8f35f9c885dfa8dd7cfe7c4842df80cd14e26

      SHA512

      c6b0353cdcfc1db4ddf12379c699aa4d555cbdcc02e4f59cb7b5921165e99b1e9560a29c80a1e6a951759729b6f83c90331db34380984f399cb4b31163c7195f

    • C:\Users\Admin\AppData\Local\Temp\axZAxx7LlE.bat

      Filesize

      195B

      MD5

      ec7c4a3342cb9035b16cee69d7aef20f

      SHA1

      6738168b01f34c166fdacfe248cba5c621ec1ad8

      SHA256

      b1ad351600d2ccd8c22acf12849740d74ab52022a73d333d8e61cbece82a43eb

      SHA512

      d5bedbba1026e6a653ecff00f0c8098e3507cab96f96c14047ff430e0c004cbacb9dbaafda07674c77e9adbf3c3e2409901b4f42a486e66d17c830fb906854eb

    • memory/2184-18-0x000000001B1D0000-0x000000001B1D8000-memory.dmp

      Filesize

      32KB

    • memory/2184-94-0x00007FFD35BC0000-0x00007FFD36681000-memory.dmp

      Filesize

      10.8MB

    • memory/2184-0-0x00007FFD35BC3000-0x00007FFD35BC5000-memory.dmp

      Filesize

      8KB

    • memory/2184-8-0x0000000002550000-0x000000000255A000-memory.dmp

      Filesize

      40KB

    • memory/2184-17-0x000000001B1E0000-0x000000001B1E8000-memory.dmp

      Filesize

      32KB

    • memory/2184-22-0x000000001B260000-0x000000001B268000-memory.dmp

      Filesize

      32KB

    • memory/2184-25-0x00007FFD35BC0000-0x00007FFD36681000-memory.dmp

      Filesize

      10.8MB

    • memory/2184-2-0x00007FFD35BC0000-0x00007FFD36681000-memory.dmp

      Filesize

      10.8MB

    • memory/2184-26-0x00007FFD35BC0000-0x00007FFD36681000-memory.dmp

      Filesize

      10.8MB

    • memory/2184-21-0x000000001B210000-0x000000001B21C000-memory.dmp

      Filesize

      48KB

    • memory/2184-20-0x000000001B200000-0x000000001B208000-memory.dmp

      Filesize

      32KB

    • memory/2184-19-0x000000001B1F0000-0x000000001B1F8000-memory.dmp

      Filesize

      32KB

    • memory/2184-6-0x0000000002420000-0x0000000002428000-memory.dmp

      Filesize

      32KB

    • memory/2184-7-0x0000000002430000-0x000000000243C000-memory.dmp

      Filesize

      48KB

    • memory/2184-5-0x0000000002410000-0x0000000002420000-memory.dmp

      Filesize

      64KB

    • memory/2184-14-0x0000000002590000-0x0000000002598000-memory.dmp

      Filesize

      32KB

    • memory/2184-13-0x0000000002580000-0x0000000002588000-memory.dmp

      Filesize

      32KB

    • memory/2184-12-0x000000001B1C0000-0x000000001B1C8000-memory.dmp

      Filesize

      32KB

    • memory/2184-11-0x000000001B1B0000-0x000000001B1B8000-memory.dmp

      Filesize

      32KB

    • memory/2184-10-0x0000000002570000-0x0000000002578000-memory.dmp

      Filesize

      32KB

    • memory/2184-9-0x0000000002560000-0x000000000256A000-memory.dmp

      Filesize

      40KB

    • memory/2184-15-0x000000001B1A0000-0x000000001B1A8000-memory.dmp

      Filesize

      32KB

    • memory/2184-4-0x0000000002400000-0x0000000002408000-memory.dmp

      Filesize

      32KB

    • memory/2184-3-0x00000000023F0000-0x00000000023F8000-memory.dmp

      Filesize

      32KB

    • memory/2184-42-0x00007FFD35BC0000-0x00007FFD36681000-memory.dmp

      Filesize

      10.8MB

    • memory/2184-1-0x00000000002C0000-0x000000000038A000-memory.dmp

      Filesize

      808KB

    • memory/2184-16-0x00000000025A0000-0x00000000025A8000-memory.dmp

      Filesize

      32KB