Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    31/05/2024, 15:40

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 15 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.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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 9 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 15 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 key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 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⤵
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2160
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2732
        • C:\portagentbrowserweb\Containerruntime.exe
          "C:\portagentbrowserweb\Containerruntime.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2720
          • C:\Program Files\Microsoft Office\Office14\1033\lsm.exe
            "C:\Program Files\Microsoft Office\Office14\1033\lsm.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:792
        • 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:2492
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files\Microsoft Office\Office14\1033\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Office14\1033\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2780
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Program Files\Microsoft Office\Office14\1033\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2560
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'C:\Windows\de-DE\taskhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2228
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\de-DE\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1800
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Windows\de-DE\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2532
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2752
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2852
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2880
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Sidebar\en-US\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2124
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\en-US\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2340
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Sidebar\en-US\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2260
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Defender\es-ES\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1300
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\es-ES\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1732
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Defender\es-ES\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1980
  • 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 use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:892
    • 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=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef2079758,0x7fef2079768,0x7fef2079778
      2⤵
        PID:600
      • 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=1156 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:2
        2⤵
          PID:1784
        • 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=1496 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:8
          2⤵
            PID:2100
          • 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=utility --mojo-platform-channel-handle=1552 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:8
            2⤵
              PID:2208
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --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=2060 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:1
              2⤵
                PID:2416
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2068 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:1
                2⤵
                  PID:2588
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1296 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:2
                  2⤵
                    PID:2828
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1436 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:1
                    2⤵
                      PID:2972
                    • 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=3396 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:8
                      2⤵
                        PID:2340
                      • 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=3524 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:8
                        2⤵
                          PID:1604
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3648 --field-trial-handle=1280,i,18323129311058802627,6042625031954728082,131072 /prefetch:8
                          2⤵
                            PID:1560
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                          1⤵
                            PID:2528

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\DawnCache\data_1

                            Filesize

                            264KB

                            MD5

                            f50f89a0a91564d0b8a211f8921aa7de

                            SHA1

                            112403a17dd69d5b9018b8cede023cb3b54eab7d

                            SHA256

                            b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                            SHA512

                            bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\000006.dbtmp

                            Filesize

                            16B

                            MD5

                            aefd77f47fb84fae5ea194496b44c67a

                            SHA1

                            dcfbb6a5b8d05662c4858664f81693bb7f803b82

                            SHA256

                            4166bf17b2da789b0d0cc5c74203041d98005f5d4ef88c27e8281e00148cd611

                            SHA512

                            b733d502138821948267a8b27401d7c0751e590e1298fda1428e663ccd02f55d0d2446ff4bc265bdcdc61f952d13c01524a5341bc86afc3c2cde1d8589b2e1c3

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                            Filesize

                            5KB

                            MD5

                            00fc75d2da6ed69de0e43f5b6f9c7162

                            SHA1

                            089f85bb30d9692af46b860039e1455609229df6

                            SHA256

                            9d91917e8cc935b3128c00b57812b134c7fb501c4ba7ff1d5ed24346d7e50ef6

                            SHA512

                            71525a535b44e38aa471396b1a2986410b333c5328aa633506f6ea6cb36c82f6d4dc54ddf33c3f4873638806ba61ab854bdbf68db04eaa9aab6035936eeb730d

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp

                            Filesize

                            16B

                            MD5

                            18e723571b00fb1694a3bad6c78e4054

                            SHA1

                            afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                            SHA256

                            8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                            SHA512

                            43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                          • C:\portagentbrowserweb\6X9rFgrS3wv5iM7PLkmLFP1j.bat

                            Filesize

                            157B

                            MD5

                            c8f8a078dace2ff4cb106803c9199643

                            SHA1

                            a5029ff4c4f0f24b0fbe2951c9a8002501ebd3b5

                            SHA256

                            1b99d39fa273f33b072c67e0df7d33b1699fa17b7c7139467a658302a5ed0e0d

                            SHA512

                            efaea3b4653768bbd135a0ec55319df2464f1d440ad982f31a5eff05c5ba5032f4718683ff6419c668bf1f34a117b5a101f56d1efc1d74ad93e692c52686f999

                          • C:\portagentbrowserweb\WRLLAAz5wgYRSh1EMNi6f5aM.vbe

                            Filesize

                            220B

                            MD5

                            61a07f2f9e8e9b1f5175b2d60c3e3f18

                            SHA1

                            e695b0c2b43c786453bf3f6ae504f0626951d281

                            SHA256

                            5c75708ec9e4fe419a2fd1067bd5793bacb28140177cc6b36300fbf28e7c23d1

                            SHA512

                            8ef3529f6bf504224e7803019f1e162aead7961bc1a5115f50fb5f580570e8b04707da21a7aab4eb7f1554a3b5333597fb3335e5f6a74dabfdb0583eecb35b5d

                          • \portagentbrowserweb\Containerruntime.exe

                            Filesize

                            1.2MB

                            MD5

                            5887a563351ca99247b7e2c448bd9f2e

                            SHA1

                            b24695e88143863297535989900bb7521ea86d67

                            SHA256

                            e74cbd74c838db604926e27322342c02f803b95f98680d4089b5c01ed93fb390

                            SHA512

                            b7d82bd09ba64891b75bbb9356de74a1ed0835709a391698c1301825777418f57e4f2ae3c260d3f7b6ada05d0e7ddeb4a6b75901fdf53bdd82ffa2febb685107

                          • memory/792-33-0x0000000000B70000-0x0000000000CA2000-memory.dmp

                            Filesize

                            1.2MB

                          • memory/2720-13-0x00000000003D0000-0x0000000000502000-memory.dmp

                            Filesize

                            1.2MB

                          • memory/2720-16-0x0000000000290000-0x000000000029C000-memory.dmp

                            Filesize

                            48KB

                          • memory/2720-15-0x0000000000260000-0x0000000000276000-memory.dmp

                            Filesize

                            88KB

                          • memory/2720-14-0x0000000000240000-0x000000000025C000-memory.dmp

                            Filesize

                            112KB