Analysis

  • max time kernel
    124s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    21-06-2024 01:27

General

  • Target

    9d589087ac7d4203c78508ac474c2070a9a3df778288899dc5c8cd7b4ea296ab.exe

  • Size

    1.1MB

  • MD5

    105e56a8f722fc60cb17281dc8a0d073

  • SHA1

    85bcb8e6b6c83f2a64260ae3ad2386b7e4aa0434

  • SHA256

    9d589087ac7d4203c78508ac474c2070a9a3df778288899dc5c8cd7b4ea296ab

  • SHA512

    6b4fd698cb80400d610629b0390314de0d06067d3648ba893a1fed5198bb6f0194e52685d95c7f0afc79eace95188668dcc05f4c6f19b89ee6ca05ca6d2b1172

  • SSDEEP

    24576:U2G/nvxW3Ww0txUX597x0D6TmBqndcQ71Ee:UbA30GPWD6BNd

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 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files 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 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 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\9d589087ac7d4203c78508ac474c2070a9a3df778288899dc5c8cd7b4ea296ab.exe
    "C:\Users\Admin\AppData\Local\Temp\9d589087ac7d4203c78508ac474c2070a9a3df778288899dc5c8cd7b4ea296ab.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1444
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\winDhcp\DyOE67CiXFDK4.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2008
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\winDhcp\QlWrCKPitO3EBDJkoooUbfBub6XAu.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2620
        • C:\winDhcp\browserhostnet.exe
          "C:\winDhcp\browserhostnet.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2660
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\HABYRpoR2i.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:492
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:2960
              • C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\System.exe
                "C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\System.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:1292
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\taskhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\taskhost.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 "taskhostt" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "browserhostnetb" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\browserhostnet.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "browserhostnet" /sc ONLOGON /tr "'C:\MSOCache\All Users\browserhostnet.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "browserhostnetb" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\browserhostnet.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2412
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1620
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1820
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\winDhcp\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2688
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\winDhcp\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\winDhcp\System.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 "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Portable Devices\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1812
    • 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:2924
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /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:548
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2220
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2944
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\Recovery\96702242-0d98-11ef-bfa8-5aba25856535\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1664

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\HABYRpoR2i.bat
      Filesize

      224B

      MD5

      82da8af4fae1807c9e916ed2d8c517d7

      SHA1

      6fb8f1398b00b160102db53a478aecb73b92c2d0

      SHA256

      d93f089fb4649481d1e4190bb70f928c9ecdd7135694e372f27bab87c21c2e0c

      SHA512

      0fa0032962a72fe3c73b429ff0cbbf0a6183d29b5a3223da4e0e929130332fe2bdedd1f0a57e0810640ef91ce34dfeeb52dfdee8f9f66d072225b5c902d5b528

    • C:\winDhcp\DyOE67CiXFDK4.vbe
      Filesize

      213B

      MD5

      a6895e1baccdda4b4f131a5d6b29884a

      SHA1

      5e53063494d49c65bb3f940edf030462a9646b0b

      SHA256

      7218700f0f012caf18a92e2f012d56b3f1241414d11bb38d69e0633a33d80ff9

      SHA512

      439eff2b5e330a534d582501053290dcf7a44f4de685cacb8b7a6b91bd76a59f044208f1e7eca52f857fe18a8c93441c0d4a62495a30b308035c6edce1b7e8a1

    • C:\winDhcp\QlWrCKPitO3EBDJkoooUbfBub6XAu.bat
      Filesize

      31B

      MD5

      0783953e91c834463a8af6965b8a6e82

      SHA1

      66d1c6db94b36f6112e393e33ae94f4b963f1b31

      SHA256

      f1abb9924b1d91414efe342d4b3a2b7e9e49aaaeef4300f5f3a0cda9e7ad853d

      SHA512

      0054fc1f4dbdc09ba5137d5b581d9da43878c23efb1ae888b71fbde8e28c09f9c39728423697dd5479063050fd5819c251856bb6b58155e9e8de99d8ee67165a

    • \winDhcp\browserhostnet.exe
      Filesize

      827KB

      MD5

      68491d301f2370e9484c90a4ca8c458a

      SHA1

      57a7952959c07c419a2204939c1da301f6a47030

      SHA256

      b92fd00e3af0abf5d62269056cf1a43e7da0efbf70467070ad2923bf41554c97

      SHA512

      3e1f8e620ce892d222a624fe5a3d791e58ae5a3ac5048639854a5021099844feda6a32109ca78666690113014eea3c29821b955d462db73cd9c1807e2e815558

    • memory/1292-35-0x0000000001210000-0x00000000012E6000-memory.dmp
      Filesize

      856KB

    • memory/2660-13-0x0000000000320000-0x00000000003F6000-memory.dmp
      Filesize

      856KB