Analysis

  • max time kernel
    149s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 01:14

General

  • Target

    439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.exe

  • Size

    829KB

  • MD5

    3bd8d1abdfdf35856a1b35c6824bd6f2

  • SHA1

    3e6e83f044690b2e5ffec74ebdef0ec9d4e8a02b

  • SHA256

    439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4

  • SHA512

    11387da3bb436ce4968eeaa03d0880b2eaa5cba780a8e393c060b0828e187d9527c24dd545f8fe3f8ad02a834cc0831d78d70e823047bf758ba42da01e0fc797

  • SSDEEP

    12288:Qu1cCMKdiaT3Ok1MVBFdpkj6fe9BSbwfKyw8:VOlKUaT3O7VBFdpLWQEfKyP

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 33 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 8 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 33 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 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\439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.exe
    "C:\Users\Admin\AppData\Local\Temp\439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4.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:4676
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\wxdqebA6cN.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4936
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:832
        • C:\Program Files (x86)\Microsoft\lsass.exe
          "C:\Program Files (x86)\Microsoft\lsass.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2716
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3956
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Windows\Temp\MsEdgeCrashpad\reports\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1268
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\Temp\MsEdgeCrashpad\reports\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4920
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\Temp\MsEdgeCrashpad\reports\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3568
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Videos\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Public\Videos\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Videos\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5048
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4380
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1376
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4076
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1592
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:376
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3884
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4084
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3596
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1472
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Windows\ShellComponents\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5112
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\ShellComponents\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4044
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Windows\ShellComponents\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 6 /tr "'C:\Windows\uk-UA\StartMenuExperienceHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4016
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\uk-UA\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5044
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 14 /tr "'C:\Windows\uk-UA\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3108
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3372
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Microsoft\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5116

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Recovery\WindowsRE\dllhost.exe

      Filesize

      829KB

      MD5

      3bd8d1abdfdf35856a1b35c6824bd6f2

      SHA1

      3e6e83f044690b2e5ffec74ebdef0ec9d4e8a02b

      SHA256

      439bcad86efe793e25a896bedbebbcbb1de01905eece9fa49cb5856a1bd562d4

      SHA512

      11387da3bb436ce4968eeaa03d0880b2eaa5cba780a8e393c060b0828e187d9527c24dd545f8fe3f8ad02a834cc0831d78d70e823047bf758ba42da01e0fc797

    • C:\Users\Admin\AppData\Local\Temp\wxdqebA6cN.bat

      Filesize

      207B

      MD5

      85db6b175bcd489319c99c4befe403e5

      SHA1

      0e5e6489b43c02c9257315a051540e470af69fdb

      SHA256

      7ac867cee33d8c7b4a60fcf8992785165520ad746eb73d69ca19d894365cf59d

      SHA512

      da5b5edc9ab71be889e0fa9afecb445809e686e3824228cea8ec893b7a122edb973ab9b9fc06b84d656b70b7db0661874141286823de40225e69e2770411660e

    • memory/4676-0-0x00007FFDB2F23000-0x00007FFDB2F25000-memory.dmp

      Filesize

      8KB

    • memory/4676-1-0x0000000000720000-0x00000000007F6000-memory.dmp

      Filesize

      856KB

    • memory/4676-4-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

      Filesize

      10.8MB

    • memory/4676-30-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

      Filesize

      10.8MB