Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-01-2025 03:44

General

  • Target

    fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe

  • Size

    2.0MB

  • MD5

    15af6864baf346e9b5fa1430a056e1a8

  • SHA1

    5ad0dfff7f611bb92ee3d3f24323f4dd9c7d5562

  • SHA256

    fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f

  • SHA512

    aa9c756d9112da082f097f54d0e49b6229639a0e35277dbd560f7623aa01603b542db06d50bfea298e45b66212b32b7677d5d1ab20c75c275e32f743c26bf495

  • SSDEEP

    24576:BhnLIfy0Y3sDsvEeuXKWdd0wrT8aF/2FFL64FHFEVI1PYAXFeTiEHyG0GieYAOe/:fgNPZdzkaFO7WeYgFeGESG01eYAU7Y

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.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Looks up external IP address via web service 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Program Files directory 5 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 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 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\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe
    "C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.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:4736
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\miKLhpZ63d.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4384
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2824
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          3⤵
            PID:3456
          • C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe
            "C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe"
            3⤵
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:620
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\upfc.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:448
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Portable Devices\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4824
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 14 /tr "'C:\Windows\Logs\CBS\sihost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1320
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\Logs\CBS\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2248
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 7 /tr "'C:\Windows\Logs\CBS\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:208
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4040
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4332
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1004
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877ff" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Downloads\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:680
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f" /sc ONLOGON /tr "'C:\Users\Public\Downloads\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.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 "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877ff" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Downloads\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1556
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Google\Update\Download\OfficeClickToRun.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4032
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Update\Download\OfficeClickToRun.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1992
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Google\Update\Download\OfficeClickToRun.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3104
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877ff" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3604
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1484
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877ff" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\AppData\Local\Temp\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1756

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Program Files (x86)\Windows Portable Devices\upfc.exe

        Filesize

        2.0MB

        MD5

        15af6864baf346e9b5fa1430a056e1a8

        SHA1

        5ad0dfff7f611bb92ee3d3f24323f4dd9c7d5562

        SHA256

        fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f

        SHA512

        aa9c756d9112da082f097f54d0e49b6229639a0e35277dbd560f7623aa01603b542db06d50bfea298e45b66212b32b7677d5d1ab20c75c275e32f743c26bf495

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\fc7c1ae206763de95cdfd31d847ca4a6ecdcd0ee4d1fa30dc6c9e29d6f85877f.exe.log

        Filesize

        1KB

        MD5

        cb4338b342d00bfe6111ffee5cbfc2ed

        SHA1

        fc16673b6833ad3cb00743a32868b859e90aa536

        SHA256

        343ed6661687e81c9615dcaea42fb1a98b70572bb9fe07e16f020108725dbbe9

        SHA512

        4bcea1366b8be00d08eb15cfd78c87e1c8f3aea140a4ea30efb3c0511cd3de21b7ce8c933c7478fb06a356573ecb928e50df23d340fbd9a6e6c156a004d2a77a

      • C:\Users\Admin\AppData\Local\Temp\miKLhpZ63d.bat

        Filesize

        278B

        MD5

        d43d4ec7385b67fceb163ac691d3aef7

        SHA1

        0d9a652d2eae1b0ff2b3f35dbe9462c224eb9bc2

        SHA256

        6171273bfcbf56a7be26ed20da69d1bc3701ac1761717f2e4373edcceffa9367

        SHA512

        d3352decffa803595b2a62021bd515a6422c8443664f27969e2ff5a6df841e75cd211f21874ed5dc68b246e7bbd0b00ace49bda52c30841e4e925f36e110c439

      • memory/620-61-0x000000001B550000-0x000000001B61D000-memory.dmp

        Filesize

        820KB

      • memory/4736-18-0x000000001B5F0000-0x000000001B5FE000-memory.dmp

        Filesize

        56KB

      • memory/4736-26-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-7-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-9-0x000000001B5B0000-0x000000001B5CC000-memory.dmp

        Filesize

        112KB

      • memory/4736-10-0x000000001B940000-0x000000001B990000-memory.dmp

        Filesize

        320KB

      • memory/4736-12-0x000000001B5D0000-0x000000001B5E8000-memory.dmp

        Filesize

        96KB

      • memory/4736-14-0x000000001B590000-0x000000001B59E000-memory.dmp

        Filesize

        56KB

      • memory/4736-21-0x000000001B600000-0x000000001B608000-memory.dmp

        Filesize

        32KB

      • memory/4736-23-0x000000001B610000-0x000000001B61C000-memory.dmp

        Filesize

        48KB

      • memory/4736-19-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-0-0x00007FFB76543000-0x00007FFB76545000-memory.dmp

        Filesize

        8KB

      • memory/4736-16-0x000000001B5A0000-0x000000001B5AC000-memory.dmp

        Filesize

        48KB

      • memory/4736-24-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-6-0x000000001B580000-0x000000001B58E000-memory.dmp

        Filesize

        56KB

      • memory/4736-33-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-4-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-38-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-39-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-40-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-41-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-42-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-43-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-51-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-3-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-49-0x000000001BBD0000-0x000000001BC9D000-memory.dmp

        Filesize

        820KB

      • memory/4736-2-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

        Filesize

        10.8MB

      • memory/4736-1-0x0000000000680000-0x000000000087C000-memory.dmp

        Filesize

        2.0MB