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Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 02:28

General

  • Target

    3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe

  • Size

    828KB

  • MD5

    af741ec427d46644c68572c50f87d61e

  • SHA1

    7e31fdcd599478fe8e6b9b07be11ff307d79ce53

  • SHA256

    3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731

  • SHA512

    ae5a81bcf21c60b32e67be306daa8eeb6bfa5e24723e46c8519ea095fccaf3509ba6a3f0372a0e4412d75f1c16eb0e634a3f31a77bb68c248d238c45af5896e8

  • SSDEEP

    12288:dKAvgOSpwbrYBil5nRRWZlN4CBe1bqOhSiXLu5uWWDKT+pDu:hvgOSpwYE53+4F+OhzlmT+pDu

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 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
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 21 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 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\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe
    "C:\Users\Admin\AppData\Local\Temp\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.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:3408
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\nbwo7iYS6J.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2496
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:3124
        • C:\odt\explorer.exe
          "C:\odt\explorer.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\odt\explorer.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\odt\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\odt\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3328
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2556
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4280
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Windows\Prefetch\ReadyBoot\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1584
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Windows\Prefetch\ReadyBoot\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\Prefetch\ReadyBoot\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\sysmon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3880
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3976
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731" /sc ONLOGON /tr "'C:\odt\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf7313" /sc MINUTE /mo 10 /tr "'C:\odt\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf7313" /sc MINUTE /mo 5 /tr "'C:\odt\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1124
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files\Internet Explorer\es-ES\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1048
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\es-ES\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files\Internet Explorer\es-ES\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\MSBuild\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1324
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files\MSBuild\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Program Files\MSBuild\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2476

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\nbwo7iYS6J.bat

      Filesize

      184B

      MD5

      3246d70029d04d4b8aeefd50bf452212

      SHA1

      a883c2b8cf660f91028ab325778485a910307929

      SHA256

      57134f6df1cac5e4c423923efdba3027f707696298964a3691df85107a69b6e4

      SHA512

      4577fc1fd4d0016a314944c0df1e1d3ed5f9c3b6eb60cffa01cd0fb3d3b310c8bae1ee928113e72d74cd570d14428a116ea1a097ff4d5b515910215a5468c167

    • C:\odt\3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731.exe

      Filesize

      828KB

      MD5

      af741ec427d46644c68572c50f87d61e

      SHA1

      7e31fdcd599478fe8e6b9b07be11ff307d79ce53

      SHA256

      3e4493f78ba3b135a512c640d1aee8b6938f3613521d8a9262ef31b604fbf731

      SHA512

      ae5a81bcf21c60b32e67be306daa8eeb6bfa5e24723e46c8519ea095fccaf3509ba6a3f0372a0e4412d75f1c16eb0e634a3f31a77bb68c248d238c45af5896e8

    • memory/868-27-0x00007FFC6F680000-0x00007FFC70141000-memory.dmp

      Filesize

      10.8MB

    • memory/868-28-0x0000000001330000-0x0000000001340000-memory.dmp

      Filesize

      64KB

    • memory/868-29-0x00007FFC6F680000-0x00007FFC70141000-memory.dmp

      Filesize

      10.8MB

    • memory/868-30-0x0000000001330000-0x0000000001340000-memory.dmp

      Filesize

      64KB

    • memory/3408-0-0x0000000000CF0000-0x0000000000DC6000-memory.dmp

      Filesize

      856KB

    • memory/3408-1-0x00007FFC6F9B0000-0x00007FFC70471000-memory.dmp

      Filesize

      10.8MB

    • memory/3408-2-0x0000000002EC0000-0x0000000002ED0000-memory.dmp

      Filesize

      64KB

    • memory/3408-23-0x00007FFC6F9B0000-0x00007FFC70471000-memory.dmp

      Filesize

      10.8MB