Resubmissions

10-06-2024 19:27

240610-x569tsxhmk 9

10-06-2024 19:21

240610-x2qgxaxdnc 9

Analysis

  • max time kernel
    79s
  • max time network
    86s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-06-2024 19:21

General

  • Target

    E4Bootstrapper.exe

  • Size

    36KB

  • MD5

    dc618bb4a38e6e9347788e4aa58878b0

  • SHA1

    4ca204ca692bef38b5ba96bd74493be18bf68acd

  • SHA256

    9d7cf052119784f65aca998c6e0c87f662e9423e51e1a3475e83d24f3b3b47e3

  • SHA512

    57c15811aa70a2e3d4111aa45e02be778559a55703eea841e4a969cea48d4d8d05df8dd45009194b5103409b3db5848b4a9ff8235ad7c9ba52bfb5aac8e863b6

  • SSDEEP

    768:SpD7f29SqkmxqvmKtZjgtFJkkprUU2N9t096MYRrpYyah+:UD7ULo+KtZ0tj3prUdN3eK

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 5 IoCs
  • Themida packer 11 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 25 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.

  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3832
    • C:\Users\Admin\AppData\Local\Temp\E4.exe
      "C:\Users\Admin\AppData\Local\Temp\E4.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3228
      • C:\Windows\System32\attrib.exe
        "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\$77MicrosoftData"
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1440
      • C:\Windows\System32\attrib.exe
        "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\$77MicrosoftData\$77$77svchost.exe.exe"
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1960
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4516
        • C:\Windows\system32\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:4148
        • C:\Users\Admin\AppData\Roaming\$77MicrosoftData\$77$77svchost.exe.exe
          "C:\Users\Admin\AppData\Roaming\$77MicrosoftData\$77$77svchost.exe.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3928
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /query /TN $77$77svchost.exe.exe
            5⤵
              PID:3604
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks.exe" /Create /SC ONCE /TN "$77$77svchost.exe.exe" /TR "C:\Users\Admin\AppData\Roaming\$77MicrosoftData\$77$77svchost.exe.exe \"\$77$77svchost.exe.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
              5⤵
              • Creates scheduled task(s)
              PID:100
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks.exe" /query /TN $77$77svchost.exe.exe
              5⤵
                PID:3712
              • C:\Windows\System32\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "$77svchost.exe_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
                5⤵
                • Creates scheduled task(s)
                PID:692
        • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
          "C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
          2⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:780
          • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
            "C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"
            3⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Loads dropped DLL
            • Checks whether UAC is enabled
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            PID:1900
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:3748

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\E4.exe
          Filesize

          40KB

          MD5

          1cfe818c59790fae5f9f14a9e8279216

          SHA1

          a59f41a6d3992e2cd1911fb753a56d60d42c924e

          SHA256

          8188936b9120d45b43047e23cd45ddd4f174454fbeba94d9cf4c3409b1419bc9

          SHA512

          d189823dbefd4e6d4532bb0be86bd6441802e20eef05d7e963943da6faad0070cf2a314b1f74a9b970bcd666a3c42a46f6d72d4c1a1a335fc55ccd45ef2681ef

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Core.dll
          Filesize

          488KB

          MD5

          851fee9a41856b588847cf8272645f58

          SHA1

          ee185a1ff257c86eb19d30a191bf0695d5ac72a1

          SHA256

          5e7faee6b8230ca3b97ce9542b914db3abbbd1cb14fd95a39497aaad4c1094ca

          SHA512

          cf5c70984cf33e12cf57116da1f282a5bd6433c570831c185253d13463b0b9a0b9387d4d1bf4dddab3292a5d9ba96d66b6812e9d7ebc5eb35cb96eea2741348f

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Wpf.dll
          Filesize

          43KB

          MD5

          34ec990ed346ec6a4f14841b12280c20

          SHA1

          6587164274a1ae7f47bdb9d71d066b83241576f0

          SHA256

          1e987b22cd011e4396a0805c73539586b67df172df75e3dded16a77d31850409

          SHA512

          b565015ca4b11b79ecbc8127f1fd40c986948050f1caefdd371d34ed2136af0aabf100863dc6fd16d67e3751d44ee13835ea9bf981ac0238165749c4987d1ae0

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\get-intrinsic\.nycrc
          Filesize

          139B

          MD5

          d0104f79f0b4f03bbcd3b287fa04cf8c

          SHA1

          54f9d7adf8943cb07f821435bb269eb4ba40ccc2

          SHA256

          997785c50b0773e5e18bf15550fbf57823c634fefe623cd37b3c83696402ad0a

          SHA512

          daf9b5445cfc02397f398adfa0258f2489b70699dfec6ca7e5b85afe5671fdcabe59edee332f718f5e5778feb1e301778dffe93bb28c1c0914f669659bad39c6

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\has-proto\.eslintrc
          Filesize

          43B

          MD5

          c28b0fe9be6e306cc2ad30fe00e3db10

          SHA1

          af79c81bd61c9a937fca18425dd84cdf8317c8b9

          SHA256

          0694050195fc694c5846b0a2a66b437ac775da988f0a779c55fb892597f7f641

          SHA512

          e3eca17804522ffa4f41e836e76e397a310a20e8261a38115b67e8b644444153039d04198fb470f45be2997d2c7a72b15bd4771a02c741b3cbc072ea6ef432e9

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\hasown\.nycrc
          Filesize

          216B

          MD5

          c2ab942102236f987048d0d84d73d960

          SHA1

          95462172699187ac02eaec6074024b26e6d71cff

          SHA256

          948366fea3b423a46366326d0bb2e54b08abd1cf0b243678ba6625740c40da5a

          SHA512

          e36b20c16ceeb090750f3865efc8d7fd983ae4e8b41c30cc3865d2fd4925bf5902627e1f1ed46c0ff2453f076ef9de34be899ef57754b29cd158440071318479

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\vary\LICENSE
          Filesize

          1KB

          MD5

          13babc4f212ce635d68da544339c962b

          SHA1

          4881ad2ec8eb2470a7049421047c6d076f48f1de

          SHA256

          bd47ce7b88c7759630d1e2b9fcfa170a0f1fde522be09e13fb1581a79d090400

          SHA512

          40e30174433408e0e2ed46d24373b12def47f545d9183b7bce28d4ddd8c8bb528075c7f20e118f37661db9f1bba358999d81a14425eb3e0a4a20865dfcb53182

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\WebView2Loader.dll
          Filesize

          133KB

          MD5

          a0bd0d1a66e7c7f1d97aedecdafb933f

          SHA1

          dd109ac34beb8289030e4ec0a026297b793f64a3

          SHA256

          79d7e45f8631e8d2541d01bfb5a49a3a090be72b3d465389a2d684680fee2e36

          SHA512

          2a50ae5c7234a44b29f82ebc2e3cfed37bf69294eb00b2dc8905c61259975b2f3a059c67aeab862f002752454d195f7191d9b82b056f6ef22d6e1b0bb3673d50

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Wpf.Ui.dll
          Filesize

          5.2MB

          MD5

          aead90ab96e2853f59be27c4ec1e4853

          SHA1

          43cdedde26488d3209e17efff9a51e1f944eb35f

          SHA256

          46cfbe804b29c500ebc0b39372e64c4c8b4f7a8e9b220b5f26a9adf42fcb2aed

          SHA512

          f5044f2ee63906287460b9adabfcf3c93c60b51c86549e33474c4d7f81c4f86cd03cd611df94de31804c53006977874b8deb67c4bf9ea1c2b70c459b3a44b38d

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\bin\path.txt
          Filesize

          34B

          MD5

          0e2184f1c7464b6617329fb18f107b4f

          SHA1

          6f22f98471e33c9db10d6f6f1728e98852e25b8f

          SHA256

          dbf5f44e1b84a298dbbcad3c31a617d2f6cfa08eb5d16e05a5c28726c574d4eb

          SHA512

          8e745c0215d52e15702551f29efb882a5eba97b5f279ccc29293b1a9b1b8661bf71b548569f9a99fa35c35a15d1b6b288d3c381c1292418c36dc89e2fa0b3a37

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.dll
          Filesize

          5.9MB

          MD5

          987175c463ec9a5e76bab033cea9d859

          SHA1

          ceed36975f4583a34c26150e045a97f5f019e769

          SHA256

          24fca8dd76effd975d230f55eb107e1be6c03d658410274fe6340a2b3ec9075c

          SHA512

          9851d254fef3fdfcd7b188893a9a547ed3f08eee82a72c273f13beb7d075beecd32e3c5c51f9e3135d7060fca71a2bf79dbdbb1a136549a9e408a6214feaa000

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
          Filesize

          85KB

          MD5

          f8f4522d11178a26e97e2046f249dfa7

          SHA1

          8b591d9a37716e235260fb6b3f601e4ccbebf15d

          SHA256

          3c372a8919c28dc76414b2f30da423c3e1018b1a8444527949ce20cc3fc93ed0

          SHA512

          52ea881cad501cf1d5e8ac47355e862ac1bd39cb6e1ff3d362d392b6f2d676e74878832505d17a552aaa3bc8f3977da11fa3f9903722eedd23716fb46ddb7492

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\libcurl.dll
          Filesize

          522KB

          MD5

          e31f5136d91bad0fcbce053aac798a30

          SHA1

          ee785d2546aec4803bcae08cdebfd5d168c42337

          SHA256

          ee94e2201870536522047e6d7fe7b903a63cd2e13e20c8fffc86d0e95361e671

          SHA512

          a1543eb1d10d25efb44f9eaa0673c82bfac5173055d04c0f3be4792984635a7c774df57a8e289f840627754a4e595b855d299070d469e0f1e637c3f35274abe6

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\vcruntime140.dll
          Filesize

          99KB

          MD5

          7a2b8cfcd543f6e4ebca43162b67d610

          SHA1

          c1c45a326249bf0ccd2be2fbd412f1a62fb67024

          SHA256

          7d7ca28235fba5603a7f40514a552ac7efaa67a5d5792bb06273916aa8565c5f

          SHA512

          e38304fb9c5af855c1134f542adf72cde159fab64385533eafa5bb6e374f19b5a29c0cb5516fc5da5c0b5ac47c2f6420792e0ac8ddff11e749832a7b7f3eb5c8

        • C:\Users\Admin\AppData\Local\Temp\Solara.Dir\zlib1.dll
          Filesize

          113KB

          MD5

          75365924730b0b2c1a6ee9028ef07685

          SHA1

          a10687c37deb2ce5422140b541a64ac15534250f

          SHA256

          945e7f5d09938b7769a4e68f4ef01406e5af9f40db952cba05ddb3431dd1911b

          SHA512

          c1e31c18903e657203ae847c9af601b1eb38efa95cb5fa7c1b75f84a2cba9023d08f1315c9bb2d59b53256dfdb3bac89930252138475491b21749471adc129a1

        • C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
          Filesize

          13KB

          MD5

          6557bd5240397f026e675afb78544a26

          SHA1

          839e683bf68703d373b6eac246f19386bb181713

          SHA256

          a7fecfc225dfdd4e14dcd4d1b4ba1b9f8e4d1984f1cdd8cda3a9987e5d53c239

          SHA512

          f2399d34898a4c0c201372d2dd084ee66a66a1c3eae949e568421fe7edada697468ef81f4fcab2afd61eaf97bcb98d6ade2d97295e2f674e93116d142e892e97

        • C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat
          Filesize

          178B

          MD5

          80249e4beb4e95943a89aab6a4923837

          SHA1

          df2e4e7ee7421cb1107bb68ad3325d7d793d1094

          SHA256

          7a5c5dad5080d3257689ca779aa55f5d5b2bcf43d9b8746de103b11e9ef7fe9e

          SHA512

          8158549e793d5f52917e7d467e216ca0e5377fded0e7e4af62400fd141744962a395562c0f21d0414bbd7065346ddbad0104bc92de99c3770622df0ed3409a5e

        • memory/780-33-0x00000000056C0000-0x00000000056D2000-memory.dmp
          Filesize

          72KB

        • memory/780-30-0x0000000002670000-0x000000000267A000-memory.dmp
          Filesize

          40KB

        • memory/780-29-0x0000000000330000-0x000000000033A000-memory.dmp
          Filesize

          40KB

        • memory/1900-1506-0x000001906F4B0000-0x000001906F4BE000-memory.dmp
          Filesize

          56KB

        • memory/1900-1534-0x0000019074B50000-0x0000019074B5E000-memory.dmp
          Filesize

          56KB

        • memory/1900-1539-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1502-0x000001906FF80000-0x000001907003A000-memory.dmp
          Filesize

          744KB

        • memory/1900-1501-0x0000019070310000-0x000001907084C000-memory.dmp
          Filesize

          5.2MB

        • memory/1900-1538-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1499-0x000001906D7E0000-0x000001906D7FA000-memory.dmp
          Filesize

          104KB

        • memory/1900-1537-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1536-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1535-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1533-0x0000019074B80000-0x0000019074BB8000-memory.dmp
          Filesize

          224KB

        • memory/1900-1504-0x0000019070040000-0x00000190700BE000-memory.dmp
          Filesize

          504KB

        • memory/1900-1527-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1526-0x000001906FF10000-0x000001906FF18000-memory.dmp
          Filesize

          32KB

        • memory/1900-1528-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1530-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1529-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/1900-1531-0x0000000180000000-0x0000000180E54000-memory.dmp
          Filesize

          14.3MB

        • memory/3228-25-0x00000000005D0000-0x00000000005DE000-memory.dmp
          Filesize

          56KB

        • memory/3228-26-0x00007FFC01D60000-0x00007FFC02821000-memory.dmp
          Filesize

          10.8MB

        • memory/3228-27-0x00007FFC01D60000-0x00007FFC02821000-memory.dmp
          Filesize

          10.8MB

        • memory/3228-1514-0x00007FFC01D60000-0x00007FFC02821000-memory.dmp
          Filesize

          10.8MB

        • memory/3832-1-0x00007FFC01D63000-0x00007FFC01D65000-memory.dmp
          Filesize

          8KB

        • memory/3832-12-0x00007FFC01D60000-0x00007FFC02821000-memory.dmp
          Filesize

          10.8MB

        • memory/3832-1509-0x00007FFC01D60000-0x00007FFC02821000-memory.dmp
          Filesize

          10.8MB

        • memory/3832-0-0x0000000000BE0000-0x0000000000BF0000-memory.dmp
          Filesize

          64KB