Analysis

  • max time kernel
    139s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-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 12 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 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3808
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\winDhcp\DyOE67CiXFDK4.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:2128
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\winDhcp\QlWrCKPitO3EBDJkoooUbfBub6XAu.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1540
        • C:\winDhcp\browserhostnet.exe
          "C:\winDhcp\browserhostnet.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in System32 directory
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4380
          • C:\Windows\SysWOW64\pl-PL\RuntimeBroker.exe
            "C:\Windows\SysWOW64\pl-PL\RuntimeBroker.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:708
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\SysWOW64\pl-PL\RuntimeBroker.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1472
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\SysWOW64\pl-PL\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2276
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Windows\SysWOW64\pl-PL\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4492
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\System.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4460
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2720
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1744
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\winDhcp\fontdrvhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2604
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\winDhcp\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\winDhcp\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3860
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4776
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • 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

  • C:\winDhcp\browserhostnet.exe
    Filesize

    827KB

    MD5

    68491d301f2370e9484c90a4ca8c458a

    SHA1

    57a7952959c07c419a2204939c1da301f6a47030

    SHA256

    b92fd00e3af0abf5d62269056cf1a43e7da0efbf70467070ad2923bf41554c97

    SHA512

    3e1f8e620ce892d222a624fe5a3d791e58ae5a3ac5048639854a5021099844feda6a32109ca78666690113014eea3c29821b955d462db73cd9c1807e2e815558

  • memory/4380-12-0x00007FFA5AD63000-0x00007FFA5AD65000-memory.dmp
    Filesize

    8KB

  • memory/4380-13-0x0000000000A80000-0x0000000000B56000-memory.dmp
    Filesize

    856KB