Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    22-06-2024 01:09

General

  • Target

    41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983.exe

  • Size

    827KB

  • MD5

    9c88646fc2e6a87d06ef9146d061b814

  • SHA1

    a5a15178301aa854faf6e8fe6048ad1372a8ac67

  • SHA256

    41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983

  • SHA512

    ebb5356f86cc925dcc8b47e0e96efe5dfb787b368c5921790086d378b574498c8083f5962d27451d78ab488667634a61f178c750b95cfcfe79f62f29989bc231

  • SSDEEP

    12288:dEo0OhY4AtUMGEvw2vd1JdxXQJN5IsULGpSCXnRKldH5x5n76:0OG4AtUMGv21PdxXu5/hRKJfnW

Score
10/10

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 21 IoCs

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

  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 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\41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983.exe
    "C:\Users\Admin\AppData\Local\Temp\41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2068
    • C:\Users\Admin\AppData\Local\Temp\41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983.exe
      "C:\Users\Admin\AppData\Local\Temp\41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983.exe"
      2⤵
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2544
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\YKtyItKL0f.bat"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2016
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          4⤵
            PID:1976
          • C:\Users\Default\SendTo\schtasks.exe
            "C:\Users\Default\SendTo\schtasks.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2588
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2956
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2612
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Windows\AppPatch\it-IT\explorer.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\AppPatch\it-IT\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2724
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Windows\AppPatch\it-IT\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2748
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\lsm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\Default User\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2852
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 10 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\schtasks.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtasks" /sc ONLOGON /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 14 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows NT\Accessories\es-ES\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2572
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\es-ES\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2416
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows NT\Accessories\es-ES\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1244
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 9 /tr "'C:\Program Files\DVD Maker\fr-FR\schtasks.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtasks" /sc ONLOGON /tr "'C:\Program Files\DVD Maker\fr-FR\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1336
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 8 /tr "'C:\Program Files\DVD Maker\fr-FR\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1980
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 8 /tr "'C:\Users\Default\SendTo\schtasks.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1304
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtasks" /sc ONLOGON /tr "'C:\Users\Default\SendTo\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1508
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "schtaskss" /sc MINUTE /mo 8 /tr "'C:\Users\Default\SendTo\schtasks.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2184

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Program Files\Windows NT\Accessories\es-ES\csrss.exe
      Filesize

      827KB

      MD5

      9c88646fc2e6a87d06ef9146d061b814

      SHA1

      a5a15178301aa854faf6e8fe6048ad1372a8ac67

      SHA256

      41ac780af4899422861ef80ac9c6ac3ac9f6cb1d7edb930f8fdbdefb2bcc4983

      SHA512

      ebb5356f86cc925dcc8b47e0e96efe5dfb787b368c5921790086d378b574498c8083f5962d27451d78ab488667634a61f178c750b95cfcfe79f62f29989bc231

    • C:\Users\Admin\AppData\Local\Temp\YKtyItKL0f.bat
      Filesize

      201B

      MD5

      4238c1fd02b8716264f77b5f2d8444a5

      SHA1

      0d9a49de59f0dbbc05e91f15b837e98f85dd4c62

      SHA256

      d4fe6d3bfb7774cbf1a9bda96f2e552c60a66d29c64d3d58c1c1941b07e85e31

      SHA512

      61409b8cf68ba1a09f7465e0584a30579d15246129b2586246446345cd0a9431fd9ceb3520b2f889ee40e9016f4377cddaf1a4601700ad51b64028c4af9cce3b

    • memory/2068-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp
      Filesize

      4KB

    • memory/2068-1-0x00000000001A0000-0x0000000000276000-memory.dmp
      Filesize

      856KB

    • memory/2068-2-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp
      Filesize

      9.9MB

    • memory/2068-9-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp
      Filesize

      9.9MB

    • memory/2588-25-0x0000000000DE0000-0x0000000000EB6000-memory.dmp
      Filesize

      856KB