Analysis

  • user interaction
    yes
  • max time kernel
    1559s
  • max time network
    1533s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    11/05/2026, 14:04

General

  • Target
    615e94e95ec6d07831fd6e91807dc77da49dd37d19539728d9dfdec3ae39fcc1.exe
  • Size 84KB
  • Sample260511-rdj3bsby5x
  • SHA256 615e94e95ec6d07831fd6e91807dc77da49dd37d19539728d9dfdec3ae39fcc1
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: KillMBR

    KillMBR is a trojan that attempts to overwrite the Master Boot Record.

  • Detects KillMBR 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Time Discovery 1 TTPs 1 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\615e94e95ec6d07831fd6e91807dc77da49dd37d19539728d9dfdec3ae39fcc1.exe
    "C:\Users\Admin\AppData\Local\Temp\615e94e95ec6d07831fd6e91807dc77da49dd37d19539728d9dfdec3ae39fcc1.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4904
    • C:\Windows\system32\cmd.exe
      "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\F4D.tmp\F4E.bat C:\Users\Admin\AppData\Local\Temp\615e94e95ec6d07831fd6e91807dc77da49dd37d19539728d9dfdec3ae39fcc1.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2412
      • C:\Windows\system32\cscript.exe
        cscript x.js
        3⤵
          PID:3908
        • C:\Users\Admin\AppData\Roaming\MEMZ.exe
          "C:\Users\Admin\AppData\Roaming\MEMZ.exe"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:4008
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Checks processor information in registry
      • Enumerates system info in registry
      • Modifies data under HKEY_USERS
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2100
      • 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:4 --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=140.0.7339.81 --initial-client-data=0x118,0x11c,0x120,0xf4,0x124,0x7fff3b36c728,0x7fff3b36c734,0x7fff3b36c740
        2⤵
          PID:3124
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-pre-read-main-dll --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADgAAAIAAAAAAAAAAAAAGAAAQAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=1756,i,4904145812848447801,4163683999968472745,262144 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=2032 /prefetch:2
          2⤵
            PID:3408
          • 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 --force-high-res-timeticks=disabled --metrics-shmem-handle=2296,i,17150889656782670368,8802450879892769880,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=2300 /prefetch:3
            2⤵
            • System Time Discovery
            PID:3352
          • 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 --force-high-res-timeticks=disabled --metrics-shmem-handle=2452,i,11352052020323919525,11083935213990299085,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=2624 /prefetch:8
            2⤵
              PID:3504
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --metrics-shmem-handle=3156,i,12541458938901931499,13501132830700724583,2097152 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=3160 /prefetch:1
              2⤵
                PID:64
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --metrics-shmem-handle=3136,i,11959709615535942736,2789253151283225126,2097152 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=3148 /prefetch:1
                2⤵
                  PID:5092
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --extension-process --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --metrics-shmem-handle=4460,i,5674143563262967844,15466786893600351306,2097152 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=4476 /prefetch:2
                  2⤵
                    PID:5428
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --metrics-shmem-handle=4760,i,14724646867430171256,1513367719172061168,2097152 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=4784 /prefetch:1
                    2⤵
                      PID:5544
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=5500,i,17339275600196447248,6102471529389208667,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=5508 /prefetch:8
                      2⤵
                        PID:4492
                      • 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 --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5780,i,5782637996215438065,10553180160946309166,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=5540 /prefetch:8
                        2⤵
                          PID:3436
                        • 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 --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5800,i,15685765296244548302,4850805515304428502,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=5804 /prefetch:8
                          2⤵
                            PID:5404
                          • 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 --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5792,i,7535598301487774382,12447898309871722814,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=5852 /prefetch:8
                            2⤵
                              PID:4232
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=5140 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADoAAAIAAAAAAAAAAAAAGAAAQAAAAAAAACEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=5740,i,4418066099603990670,147617605119483006,262144 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=1188 /prefetch:8
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:3592
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=on_device_model.mojom.OnDeviceModelService --lang=en-US --service-sandbox-type=on_device_model_execution --force-high-res-timeticks=disabled --metrics-shmem-handle=5852,i,7078395041314668029,16692503406813589513,524288 --field-trial-handle=2036,i,11560219604176234691,5348230720573771378,262144 --variations-seed-version=20260129-090048.396000 --mojo-platform-channel-handle=1344 /prefetch:8
                              2⤵
                                PID:3480
                            • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
                              "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
                              1⤵
                                PID:2116
                              • C:\Windows\system32\svchost.exe
                                C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                                1⤵
                                  PID:1004

                                Network

                                      MITRE ATT&CK Enterprise v16

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      BookmarkMergedSurfaceOrdering

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BookmarkMergedSurfaceOrdering
                                      • Size 6B
                                      • SHA256 4489f9e3e454748b3521eb214e0a5694d562cff3d9ff511cb456953c8f534c00
                                      • MD5 SHA1 SHA512

                                      BrowsingTopicsState

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BrowsingTopicsState
                                      • Size 414B
                                      • SHA256 cca19abffd9b2284125141db50a6d89b372a45c8c13368f5cc29159fa10bef83
                                      • MD5 SHA1 SHA512 TLSH

                                      Network Persistent State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                      • Size 3KB
                                      • SHA256 3b7a0d2fcf7992962ead418ad9bb27f4824107a757b5ede784b9fe4e1a5448ca
                                      • MD5 SHA1 SHA512 TLSH

                                      Network Persistent State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                      • Size 2KB
                                      • SHA256 e3ce3519a761e6f9d27cd93b4fcd61ff172465e7255c4748fcb9612cd802cbda
                                      • MD5 SHA1 SHA512 TLSH

                                      SCT Auditing Pending Reports

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports
                                      • Size 2B
                                      • SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
                                      • MD5 SHA1 SHA512

                                      TransportSecurity

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                      • Size 523B
                                      • SHA256 dc19aa65769306486aac08f28cfe2898d1b3a5a84c69952b5f8458bb71ad6104
                                      • MD5 SHA1 SHA512 TLSH

                                      Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                      • Size 12KB
                                      • SHA256 e4d920e19e44a42530a0b9cbc569f478e4fe2059026cde2de8450e37bf0a6572
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                      • Size 13KB
                                      • SHA256 4302a94b65ebb8ac2fd7ff6836a455d03fac8500d5fba9d56561ca941245192a
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                      • Size 12KB
                                      • SHA256 24b5c71090cc70a911486a99ca6c737645853ba415fd0c0cf85e837ab202b9ef
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                      • Size 12KB
                                      • SHA256 3c95688736ced0bdf90e3e1e07c4564b0c0eb511090fa708045b8556dedc0c7e
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Secure Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Secure Preferences
                                      • Size 17KB
                                      • SHA256 b6664493cc7f354e0d0f13cf223dbfd0ee087fdfcfd4eb7b90ba4c92fef1899c
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      the-real-index

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\the-real-index
                                      • Size 120B
                                      • SHA256 d152b44c70cd8ab8f3485826c8d034a7201b39b40a6512c4951b2a33e8ad940f
                                      • MD5 SHA1 SHA512 TLSH

                                      the-real-index~RFe58b447.TMP

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Service Worker\ScriptCache\index-dir\the-real-index~RFe58b447.TMP
                                      • Size 96B
                                      • SHA256 5ac7d17b201c097853eb5562770d3094ce3293439b017fe3a8d08c43f5059d25
                                      • MD5 SHA1 SHA512 TLSH

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 202KB
                                      • SHA256 3c6a29968ccd451e16490f710cd6fa5d9fa5795165368e7d370089af00ab9ff2
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 202KB
                                      • SHA256 b5f6d7d7917e11c788fcfb1e02b52c9d5b7b95ebd9682e1c64c5e838f4f494e2
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 201KB
                                      • SHA256 74a50cd1c0c3dfdece9b67d52b239b80535ef434e97c0e5dd3bf8f6c11580a8f
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 201KB
                                      • SHA256 6becb3be21f04ae3d41f93acb3723eaa08a025ada11634a242f0737ea422166b
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 89KB
                                      • SHA256 b67bebf6f314b025c188ec5ce144ea312f51eb3f62eeacaa396f47533e3e899a
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      F4E.bat

                                      • Path C:\Users\Admin\AppData\Local\Temp\F4D.tmp\F4E.bat
                                      • Size 13KB
                                      • SHA256 73b1516cf233953836bd4c5964d8246da55fc49d1ec2706405330e9fe108581c
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      x

                                      • Path C:\Users\Admin\AppData\Local\Temp\x
                                      • Size 11KB
                                      • SHA256 3c8cea1a86f07b018e637a1ea2649d907573f78c7e4025ef7e514362d09ff6c0
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      x

                                      • Path C:\Users\Admin\AppData\Local\Temp\x
                                      • Size 4KB
                                      • SHA256 45f18ccd8df88c127304a7855a608661b52b0ca813e87e06d87da15259c45037
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      x.js

                                      • Path C:\Users\Admin\AppData\Local\Temp\x.js
                                      • Size 448B
                                      • SHA256 aa01b8864b43e92077a106ed3d4656a511f3ba1910fba40c78a32ee6a621d596
                                      • MD5 SHA1 SHA512 TLSH

                                      z.zip

                                      • Path C:\Users\Admin\AppData\Local\Temp\z.zip
                                      • Size 8KB
                                      • SHA256 44c1857b1c4894b3dfbaccbe04905652e634283dcf6b06c25a74b17021e2a268
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      MEMZ.exe

                                      • Path C:\Users\Admin\AppData\Roaming\MEMZ.exe
                                      • Size 14KB
                                      • SHA256 a3d5715a81f2fbeb5f76c88c9c21eeee87142909716472f911ff6950c790c24d
                                      • MD5 SHA1 SHA512 SSDEEP TLSH

                                      memory/3908-182-0x0000016D4D870000-0x0000016D4D87C000-memory.dmp

                                      memory/4008-188-0x0000000002F80000-0x0000000003201000-memory.dmp

                                      memory/4008-189-0x0000000002F80000-0x0000000003201000-memory.dmp

                                      memory/4904-187-0x00000000009D0000-0x0000000000C51000-memory.dmp

                                      memory/4904-0-0x0000000000412000-0x0000000000413000-memory.dmp