Analysis

  • max time kernel
    94s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-02-2025 16:55

General

  • Target

    fc27116ce1b57a71d7d201e9aae86b01.exe

  • Size

    2.5MB

  • MD5

    fc27116ce1b57a71d7d201e9aae86b01

  • SHA1

    ff047b7c918d9ff388b5c4928bfad5dcc818f1d4

  • SHA256

    121d462ca9f33798e076d069ec6b84c5ae0573bbaac8df8dd78efbb7041bd30b

  • SHA512

    25747516de2d99e6193fc920435ececf1b7ddb8990487d26d03cf6179b7dab0f5172c0dfa5d4db4a29028c00c12a9fb266bc14d6920e864d6a3934af7748618b

  • SSDEEP

    49152:zx6mbB202bRTk7puPi9bOdL/+AmU0FwGkxKYFC19Jm/PKh:zUmbB20sRSuPi9bQL/+AmU0F7LS

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 21 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
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 9 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 21 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\fc27116ce1b57a71d7d201e9aae86b01.exe
    "C:\Users\Admin\AppData\Local\Temp\fc27116ce1b57a71d7d201e9aae86b01.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • 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:1632
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\3U2IJRAvoj.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4276
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:4608
        • C:\Program Files (x86)\Microsoft.NET\RedistList\lsass.exe
          "C:\Program Files (x86)\Microsoft.NET\RedistList\lsass.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:3332
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft\Edge\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3388
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\Edge\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4680
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft\Edge\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1752
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2888
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:412
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1900
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Windows\Vss\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Vss\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2220
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\Vss\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3820
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows NT\Accessories\uk-UA\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\uk-UA\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1492
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows NT\Accessories\uk-UA\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3368
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:392
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4452
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1324
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Windows\ModemLogs\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\ModemLogs\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Windows\ModemLogs\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4056

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Windows NT\Accessories\uk-UA\fontdrvhost.exe

      Filesize

      2.5MB

      MD5

      fc27116ce1b57a71d7d201e9aae86b01

      SHA1

      ff047b7c918d9ff388b5c4928bfad5dcc818f1d4

      SHA256

      121d462ca9f33798e076d069ec6b84c5ae0573bbaac8df8dd78efbb7041bd30b

      SHA512

      25747516de2d99e6193fc920435ececf1b7ddb8990487d26d03cf6179b7dab0f5172c0dfa5d4db4a29028c00c12a9fb266bc14d6920e864d6a3934af7748618b

    • C:\Users\Admin\AppData\Local\Temp\3U2IJRAvoj.bat

      Filesize

      222B

      MD5

      1e30095cb031bfffd2a01d895d1dfb71

      SHA1

      1582d9285bb1511d11a845c203b203d1ca16c75f

      SHA256

      704f44680b3f90458009b8a76550423de783c81595788a928cb6286c47425b08

      SHA512

      7de047e3709533ad192dd00b7ca579586f1481a2bd2cbcd42429b7318d8484f645ae191216389d77970bc6155f07bb5017cb5d6e7ea21efc528d0f2b6fca52f8

    • memory/1632-10-0x000000001BD40000-0x000000001BD48000-memory.dmp

      Filesize

      32KB

    • memory/1632-11-0x000000001BE50000-0x000000001BE5C000-memory.dmp

      Filesize

      48KB

    • memory/1632-4-0x000000001BC70000-0x000000001BC8C000-memory.dmp

      Filesize

      112KB

    • memory/1632-6-0x0000000002BC0000-0x0000000002BC8000-memory.dmp

      Filesize

      32KB

    • memory/1632-5-0x000000001BCE0000-0x000000001BD30000-memory.dmp

      Filesize

      320KB

    • memory/1632-7-0x0000000002BE0000-0x0000000002BEA000-memory.dmp

      Filesize

      40KB

    • memory/1632-8-0x000000001BC90000-0x000000001BCE6000-memory.dmp

      Filesize

      344KB

    • memory/1632-9-0x000000001BD30000-0x000000001BD3C000-memory.dmp

      Filesize

      48KB

    • memory/1632-0-0x00007FFBA4F93000-0x00007FFBA4F95000-memory.dmp

      Filesize

      8KB

    • memory/1632-3-0x0000000002BB0000-0x0000000002BBE000-memory.dmp

      Filesize

      56KB

    • memory/1632-12-0x000000001BD50000-0x000000001BD5C000-memory.dmp

      Filesize

      48KB

    • memory/1632-13-0x000000001BDD0000-0x000000001BDDC000-memory.dmp

      Filesize

      48KB

    • memory/1632-14-0x000000001BD60000-0x000000001BD6E000-memory.dmp

      Filesize

      56KB

    • memory/1632-15-0x000000001BD70000-0x000000001BD7C000-memory.dmp

      Filesize

      48KB

    • memory/1632-16-0x000000001BD80000-0x000000001BD8C000-memory.dmp

      Filesize

      48KB

    • memory/1632-2-0x00007FFBA4F90000-0x00007FFBA5A51000-memory.dmp

      Filesize

      10.8MB

    • memory/1632-1-0x00000000008B0000-0x0000000000B2A000-memory.dmp

      Filesize

      2.5MB

    • memory/1632-37-0x00007FFBA4F90000-0x00007FFBA5A51000-memory.dmp

      Filesize

      10.8MB

    • memory/3332-41-0x000000001D7C0000-0x000000001D816000-memory.dmp

      Filesize

      344KB