Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 15:34

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 18 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 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 18 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 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:4940
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1560
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4204
        • C:\portagentbrowserweb\Containerruntime.exe
          "C:\portagentbrowserweb\Containerruntime.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4108
          • C:\Users\All Users\SoftwareDistribution\dwm.exe
            "C:\Users\All Users\SoftwareDistribution\dwm.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:3536
        • 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:5036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Program Files\Internet Explorer\images\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1996
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\images\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Program Files\Internet Explorer\images\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:696
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1388
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3068
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4644
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4188
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\portagentbrowserweb\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:556
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\portagentbrowserweb\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:628
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2564
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:5052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2316
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\SoftwareDistribution\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1584
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\All Users\SoftwareDistribution\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\SoftwareDistribution\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2296
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3880
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3520
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:564
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2476
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=110.0.5481.104 --initial-client-data=0x11c,0x120,0x124,0xf8,0x128,0x7ff96db3ab58,0x7ff96db3ab68,0x7ff96db3ab78
      2⤵
        PID:4584
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1776 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:2
        2⤵
          PID:2964
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2120 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:8
          2⤵
            PID:448
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=2240 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:8
            2⤵
              PID:4512
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=3140 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:1
              2⤵
                PID:872
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3160 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:1
                2⤵
                  PID:1884
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4512 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:1
                  2⤵
                    PID:2556
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4556 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:8
                    2⤵
                      PID:3008
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4688 --field-trial-handle=1972,i,1860838894579277561,6265972624126001939,131072 /prefetch:8
                      2⤵
                        PID:2956
                    • C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe
                      "C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"
                      1⤵
                        PID:868

                      Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports
                        Filesize

                        2B

                        MD5

                        d751713988987e9331980363e24189ce

                        SHA1

                        97d170e1550eee4afc0af065b78cda302a97674c

                        SHA256

                        4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                        SHA512

                        b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                      • 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

                      • \??\pipe\crashpad_2476_SVVMGAUKPDGOCOEU
                        MD5

                        d41d8cd98f00b204e9800998ecf8427e

                        SHA1

                        da39a3ee5e6b4b0d3255bfef95601890afd80709

                        SHA256

                        e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                        SHA512

                        cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                      • memory/4108-12-0x00007FF95DC93000-0x00007FF95DC95000-memory.dmp
                        Filesize

                        8KB

                      • memory/4108-13-0x0000000000520000-0x0000000000652000-memory.dmp
                        Filesize

                        1.2MB

                      • memory/4108-14-0x0000000000F70000-0x0000000000F8C000-memory.dmp
                        Filesize

                        112KB

                      • memory/4108-15-0x000000001B230000-0x000000001B280000-memory.dmp
                        Filesize

                        320KB

                      • memory/4108-16-0x0000000002880000-0x0000000002896000-memory.dmp
                        Filesize

                        88KB

                      • memory/4108-17-0x00000000028A0000-0x00000000028AC000-memory.dmp
                        Filesize

                        48KB