Analysis

  • max time kernel
    93s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-01-2025 04:30

General

  • Target

    877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe

  • Size

    1.8MB

  • MD5

    3d213353948aba4d80c28823d8661951

  • SHA1

    8c7dadac2ee5f348a8940ab47187b39fd025bead

  • SHA256

    877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19

  • SHA512

    36ba2c76563094e5c8248a05c088ad9c496573ccb6a9799759c38ef77f89e61b9832c617abc7322646c7c029ec8e573f82a4a1cc25b656bee5af82a188cab6c1

  • SSDEEP

    24576:/r34Nhem94rOh31QzGpKHaHYSvvv22db+PowhGhomMJV4ynedX4QD/d5lBxdU7it:/I6g1AqY2v22pVfSJKyiXRd5lKu

Score
10/10

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 18 IoCs

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

  • 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 5 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 18 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 8 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\877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe
    "C:\Users\Admin\AppData\Local\Temp\877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\dxh2Krkmfz.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2288
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:64
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          3⤵
            PID:1092
          • C:\Program Files (x86)\Windows Sidebar\Gadgets\fontdrvhost.exe
            "C:\Program Files (x86)\Windows Sidebar\Gadgets\fontdrvhost.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:1912
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\spoolsv.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4684
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4412
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\spoolsv.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3484
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4976
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2952
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2796
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2220
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2904
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4048
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Documents\My Videos\explorer.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4092
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Public\Documents\My Videos\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1636
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Documents\My Videos\explorer.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1304
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\fontdrvhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1888
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4776
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:732
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e198" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\Temp\877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3392
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4836
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e198" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\AppData\Local\Temp\877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4120

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\spoolsv.exe

        Filesize

        1.8MB

        MD5

        3d213353948aba4d80c28823d8661951

        SHA1

        8c7dadac2ee5f348a8940ab47187b39fd025bead

        SHA256

        877671c4a555e37e34c6b9ecab2cc958b28cc9617c6f53e3841a6386de180e19

        SHA512

        36ba2c76563094e5c8248a05c088ad9c496573ccb6a9799759c38ef77f89e61b9832c617abc7322646c7c029ec8e573f82a4a1cc25b656bee5af82a188cab6c1

      • C:\Users\Admin\AppData\Local\Temp\dxh2Krkmfz.bat

        Filesize

        238B

        MD5

        153c462294b05923de94b90155219570

        SHA1

        d52c61793de3862f236eed713521a5356f2c65a4

        SHA256

        e5f51e9089d44107bedf9feef6b275867aeab7d7aca6696b053177abb1d00d5b

        SHA512

        742a9b5b9f4578cbc128255fdd4ceffd5897a0098540a95f0d47bd5350523e7a545bc414da31e1138c4d0362da782f4677cb8e9e1224c5c6d5679a077ae8d1df

      • memory/2704-11-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-16-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-5-0x0000000000FB0000-0x0000000000FBE000-memory.dmp

        Filesize

        56KB

      • memory/2704-6-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-8-0x000000001B540000-0x000000001B55C000-memory.dmp

        Filesize

        112KB

      • memory/2704-9-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-0-0x00007FFB5E353000-0x00007FFB5E355000-memory.dmp

        Filesize

        8KB

      • memory/2704-13-0x000000001B560000-0x000000001B578000-memory.dmp

        Filesize

        96KB

      • memory/2704-15-0x0000000001020000-0x000000000102E000-memory.dmp

        Filesize

        56KB

      • memory/2704-3-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-10-0x000000001B9E0000-0x000000001BA30000-memory.dmp

        Filesize

        320KB

      • memory/2704-2-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-28-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-29-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-30-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-36-0x00007FFB5E350000-0x00007FFB5EE11000-memory.dmp

        Filesize

        10.8MB

      • memory/2704-1-0x0000000000710000-0x00000000008EE000-memory.dmp

        Filesize

        1.9MB