Analysis

  • max time kernel
    126s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 15:41

General

  • Target

    nursultan nexgen fix.exe

  • Size

    1.5MB

  • MD5

    a3d07c747770c9a471a44446e46e33d5

  • SHA1

    8340534fb1770bae9660287ddb0496e243efcfe4

  • SHA256

    16015088c3352a8257f420555e7ce6245aa0e6682deeca79bf7e08c24e1ac3de

  • SHA512

    307cbdddaa9f426f8ceec060c2c0b1ab5ed3573e327dbcfdda7b1dfd22cf17559f017d835d71bdd15397fa95b0c7dfbfb4cd6b51cd5b2adc1d1cddc8ffe27f99

  • SSDEEP

    24576:U2G/nvxW3Ww0tpfnNGcvUCxt9groiK5Cg3ZRvm43TzvmF2cK07:UbA30pfnLRRgrheJROuTzvIR

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 48 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.

  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 16 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 48 IoCs

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

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 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\nursultan nexgen fix.exe
    "C:\Users\Admin\AppData\Local\Temp\nursultan nexgen fix.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4672
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4452
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3624
        • C:\portagentbrowserweb\Containerruntime.exe
          "C:\portagentbrowserweb\Containerruntime.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • 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:4600
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\RLFQadQlTM.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:544
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:4548
              • C:\Program Files (x86)\Windows Media Player\de-DE\OfficeClickToRun.exe
                "C:\Program Files (x86)\Windows Media Player\de-DE\OfficeClickToRun.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:1936
          • C:\Windows\SysWOW64\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
            4⤵
            • Modifies registry key
            PID:1576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\portagentbrowserweb\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\portagentbrowserweb\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 7 /tr "'C:\Program Files\WindowsPowerShell\conhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3008
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files\WindowsPowerShell\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2164
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 14 /tr "'C:\Program Files\WindowsPowerShell\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1976
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\Update\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Update\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4184
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Google\Update\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1968
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Default User\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4520
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "ContainerruntimeC" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\Containerruntime.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Containerruntime" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Containerruntime.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3184
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "ContainerruntimeC" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\Containerruntime.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4492
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5068
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 5 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2084
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2252
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4140
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\Registry.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2096
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3168
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5056
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1080
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1596
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4180
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Downloads\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2616
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Users\Admin\Downloads\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2960
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\Downloads\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1112
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Media Player\de-DE\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:64
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\de-DE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Media Player\de-DE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3228
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\conhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1992
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3880
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1656
    • 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:2024
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Windows\debug\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\debug\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 10 /tr "'C:\Windows\debug\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\portagentbrowserweb\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\portagentbrowserweb\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3672
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\portagentbrowserweb\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4636
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1364

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      235B

      MD5

      9293a79bca46264b0dbbe662abeea91c

      SHA1

      e9939199b0f590ff13b61373c02552e51fab3f8a

      SHA256

      ac3f61dd9c030a7aca8b92b1fa0ca9ef7b3f74ee8e5f1acbab8286d3e6cb0975

      SHA512

      475160cc30c28e1853f748189cca0b7282f8fbe1e4bf28a5751fcf120f9733aa7c174eb169b1eebbd7f51f23e61146cf841c430d8653f65d2e8fb247edbf418f

    • C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat
      Filesize

      157B

      MD5

      c8f8a078dace2ff4cb106803c9199643

      SHA1

      a5029ff4c4f0f24b0fbe2951c9a8002501ebd3b5

      SHA256

      1b99d39fa273f33b072c67e0df7d33b1699fa17b7c7139467a658302a5ed0e0d

      SHA512

      efaea3b4653768bbd135a0ec55319df2464f1d440ad982f31a5eff05c5ba5032f4718683ff6419c668bf1f34a117b5a101f56d1efc1d74ad93e692c52686f999

    • C:\portagentbrowserweb\Containerruntime.exe
      Filesize

      1.2MB

      MD5

      5887a563351ca99247b7e2c448bd9f2e

      SHA1

      b24695e88143863297535989900bb7521ea86d67

      SHA256

      e74cbd74c838db604926e27322342c02f803b95f98680d4089b5c01ed93fb390

      SHA512

      b7d82bd09ba64891b75bbb9356de74a1ed0835709a391698c1301825777418f57e4f2ae3c260d3f7b6ada05d0e7ddeb4a6b75901fdf53bdd82ffa2febb685107

    • C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe
      Filesize

      220B

      MD5

      61a07f2f9e8e9b1f5175b2d60c3e3f18

      SHA1

      e695b0c2b43c786453bf3f6ae504f0626951d281

      SHA256

      5c75708ec9e4fe419a2fd1067bd5793bacb28140177cc6b36300fbf28e7c23d1

      SHA512

      8ef3529f6bf504224e7803019f1e162aead7961bc1a5115f50fb5f580570e8b04707da21a7aab4eb7f1554a3b5333597fb3335e5f6a74dabfdb0583eecb35b5d

    • memory/4600-12-0x00007FFE22D33000-0x00007FFE22D35000-memory.dmp
      Filesize

      8KB

    • memory/4600-13-0x0000000000D20000-0x0000000000E52000-memory.dmp
      Filesize

      1.2MB

    • memory/4600-14-0x0000000002F00000-0x0000000002F1C000-memory.dmp
      Filesize

      112KB

    • memory/4600-15-0x000000001C150000-0x000000001C1A0000-memory.dmp
      Filesize

      320KB

    • memory/4600-16-0x000000001B990000-0x000000001B9A6000-memory.dmp
      Filesize

      88KB

    • memory/4600-17-0x0000000002EE0000-0x0000000002EEC000-memory.dmp
      Filesize

      48KB