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Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/10/2024, 19:16

General

  • Target

    759B333FD8D1EEDB5666FDEA1DA25B25.exe

  • Size

    827KB

  • MD5

    759b333fd8d1eedb5666fdea1da25b25

  • SHA1

    b66fc861196561f793062622b88cdb1065e35459

  • SHA256

    7a1a3397249836cac73c5f104211fb6cbb2317c830c148a65acb709210aadd2e

  • SHA512

    831006157773f5a30dbf07dcbfd484f49a978c077f8e132d33c8e044f8141462bb890c344724b23c3144488c1c406d576b7009c1205772a503ce6cc92692aec3

  • SSDEEP

    12288:M+B2ad7F/Jf2xm1/nNfkOV+0Z3+5DlpAXdet4y5+q:gad7PuxmRn60Zu7xtZp

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 30 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 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 30 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 12 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\759B333FD8D1EEDB5666FDEA1DA25B25.exe
    "C:\Users\Admin\AppData\Local\Temp\759B333FD8D1EEDB5666FDEA1DA25B25.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:1432
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\WJK7FqKUQ3.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4540
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:524
        • C:\Users\Admin\AppData\Local\Temp\759B333FD8D1EEDB5666FDEA1DA25B25.exe
          "C:\Users\Admin\AppData\Local\Temp\759B333FD8D1EEDB5666FDEA1DA25B25.exe"
          3⤵
          • 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:3360
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\duAJR2V8lD.bat"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1340
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              5⤵
                PID:2036
              • C:\Users\Default\Links\services.exe
                "C:\Users\Default\Links\services.exe"
                5⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1216
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Portable Devices\csrss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1004
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:232
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\services.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3508
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4568
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3132
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Common Files\Adobe\HelpCfg\en_US\csrss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4200
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Adobe\HelpCfg\en_US\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:60
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Common Files\Adobe\HelpCfg\en_US\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2308
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\services.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:864
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1680
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1940
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Links\services.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2016
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default\Links\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4684
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Links\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3156
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Users\Public\Pictures\sysmon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3376
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\Public\Pictures\sysmon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4316
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Pictures\sysmon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:5004
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Contacts\RuntimeBroker.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1416
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Admin\Contacts\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3568
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Contacts\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2004
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 7 /tr "'C:\Windows\tracing\WaaSMedicAgent.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1260
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WaaSMedicAgent" /sc ONLOGON /tr "'C:\Windows\tracing\WaaSMedicAgent.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1308
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 13 /tr "'C:\Windows\tracing\WaaSMedicAgent.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4456
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Videos\sihost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4796
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Users\Admin\Videos\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3724
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\Videos\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2932
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Program Files\Java\smss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3248
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Java\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2912
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files\Java\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3008

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Recovery\WindowsRE\c5b4cb5e9653cc

        Filesize

        953B

        MD5

        0c3d4f47240d900de927b762da5ab8d3

        SHA1

        f658d7c2f2f203782fda10b6cda802c1797e57b0

        SHA256

        9fb393718c5fe8d777a4893b40fd98cb036e70defb318b65bf0ab52e81d61650

        SHA512

        912bb6cb9a83163f1c43a65e65ebe9377559fff5f993a59fab95a56738d81dd92e8492a763db4b8d6935c758ac84ca2aa4bbc470057eca05a1eb119fc724d090

      • C:\Recovery\WindowsRE\services.exe

        Filesize

        827KB

        MD5

        759b333fd8d1eedb5666fdea1da25b25

        SHA1

        b66fc861196561f793062622b88cdb1065e35459

        SHA256

        7a1a3397249836cac73c5f104211fb6cbb2317c830c148a65acb709210aadd2e

        SHA512

        831006157773f5a30dbf07dcbfd484f49a978c077f8e132d33c8e044f8141462bb890c344724b23c3144488c1c406d576b7009c1205772a503ce6cc92692aec3

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\759B333FD8D1EEDB5666FDEA1DA25B25.exe.log

        Filesize

        1KB

        MD5

        7f3c0ae41f0d9ae10a8985a2c327b8fb

        SHA1

        d58622bf6b5071beacf3b35bb505bde2000983e3

        SHA256

        519fceae4d0dd4d09edd1b81bcdfa8aeab4b59eee77a4cd4b6295ce8e591a900

        SHA512

        8a8fd17eef071f86e672cba0d8fc2cfed6118aff816100b9d7c06eb96443c04c04bc5692259c8d7ecb1563e877921939c61726605af4f969e3f586f0913ed125

      • C:\Users\Admin\AppData\Local\Temp\WJK7FqKUQ3.bat

        Filesize

        235B

        MD5

        cd5fb5f483c100226bd9aaef8ff0a0a2

        SHA1

        cb3b519a3115bb723c034ccf1b0fcab61bb3a106

        SHA256

        caff26946a7af8beb5a833b0a7b31ea02d099731b2564d0a0d2078985eee7cd9

        SHA512

        7ed28ee4289cb30324f2e64dd2ead658bab878c274c810f395fa8404c8c2156758116d5181c2b5efda93d8d4829e94f19544685dd39880f8c08f519823322d2f

      • C:\Users\Admin\AppData\Local\Temp\duAJR2V8lD.bat

        Filesize

        200B

        MD5

        9523f45d02aa00b49b79c85498d32f66

        SHA1

        d418ecc43db6f20873603d81f5456b24fa4ad9b8

        SHA256

        b367c7644962ad92902d5bf9c39c60d85b4ed87bda2d0ee34d666a4157dedcf3

        SHA512

        2a703d198fb282eb9664f20da896d719e77a17e1091c9c1e975a7ff95d0ab030fccf801ac46dcc9c470e493f1315153b250dbccaf4eea58c8eb5ddbb9956de56

      • C:\Users\Admin\AppData\Local\Temp\tmp9385A.tmp

        Filesize

        780B

        MD5

        fa7102b8365c819db9b015b3afeff40c

        SHA1

        951a0c9324e33bbc28e8bac36e93d9e81d9f4839

        SHA256

        049e31975100985cc4320ad4c4dc5568cbca0685a40c0b586c296a5d9e3f7372

        SHA512

        20a754d05224fc61dbc310d05c004a39cb6656f9942a7c9d8f280966d7311ee4761ce4a411c3cdab06e70fbd104fa2d5309bb6bde7ebc1de7ed4aee3cbc191a6

      • memory/1432-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

        Filesize

        8KB

      • memory/1432-1-0x00000000007D0000-0x00000000008A6000-memory.dmp

        Filesize

        856KB

      • memory/1432-4-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

        Filesize

        10.8MB

      • memory/1432-13-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

        Filesize

        10.8MB