Analysis

  • max time kernel
    163s
  • max time network
    160s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/08/2024, 10:03

General

  • Target
    source/mbr.exe
  • Size 1.3MB
  • Sample240809-l3bjlayhrp
  • SHA256 9ac99df89c676a55b48de00384506f4c232c75956b1e465f7fe437266002655e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in Windows directory 4 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

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

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\source\mbr.exe
    "C:\Users\Admin\AppData\Local\Temp\source\mbr.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • System Location Discovery: System Language Discovery
    PID:224
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Drops file in Windows directory
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:3840
    • 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=123.0.6312.123 --initial-client-data=0xfc,0x100,0x104,0xe4,0x108,0x7ffab1aacc40,0x7ffab1aacc4c,0x7ffab1aacc58
      2⤵
        PID:4868
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=1780,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=1776 /prefetch:2
        2⤵
          PID:5108
        • 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 --no-appcompat-clear --field-trial-handle=2112,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=2124 /prefetch:3
          2⤵
            PID:2908
          • 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 --no-appcompat-clear --field-trial-handle=2212,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=2180 /prefetch:8
            2⤵
              PID:4536
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3128,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=3180 /prefetch:1
              2⤵
                PID:4972
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3184,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=3320 /prefetch:1
                2⤵
                  PID:4524
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=3560,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=4524 /prefetch:1
                  2⤵
                    PID:2656
                  • 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 --no-appcompat-clear --field-trial-handle=4880,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=4888 /prefetch:8
                    2⤵
                      PID:872
                    • C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe
                      "C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe" --reenable-autoupdates --system-level
                      2⤵
                      • Drops file in Windows directory
                      PID:1760
                      • C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe
                        "C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\SystemTemp\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=123.0.6312.123 --initial-client-data=0x244,0x248,0x24c,0x220,0x250,0x7ff6097e4698,0x7ff6097e46a4,0x7ff6097e46b0
                        3⤵
                        • Drops file in Windows directory
                        PID:2784
                    • 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 --no-appcompat-clear --field-trial-handle=4384,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=4500 /prefetch:8
                      2⤵
                        PID:4488
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --field-trial-handle=5068,i,4209621761383751777,15490445294272051085,262144 --variations-seed-version=20240801-180145.014000 --mojo-platform-channel-handle=5096 /prefetch:1
                        2⤵
                          PID:4896
                      • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
                        "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
                        1⤵
                          PID:1632
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:3960

                          Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                f_000002

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000002
                                • Size 117KB
                                • SHA256 d2fa85aaba46d9e7a8af32ce380ed30f0fe2e5c081cef3674a3d1fe21584885f
                                • MD5 SHA1 SHA512 SSDEEP

                                f_00000a

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_00000a
                                • Size 30KB
                                • SHA256 317bc7e789e17191dbb12502a0179585a309fc3791284d949184d23e846bb1ec
                                • MD5 SHA1 SHA512 SSDEEP

                                f_00000b

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_00000b
                                • Size 350KB
                                • SHA256 f172b25397fe36d2aa4402535ef06b6d4bed4bce3e651c796d4876011964661e
                                • MD5 SHA1 SHA512 SSDEEP

                                f_00000c

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_00000c
                                • Size 42KB
                                • SHA256 351bf864615f4ac840dc826607ce2467ba9dc7178fd0f8024b5ed8691b0f1d05
                                • MD5 SHA1 SHA512 SSDEEP

                                the-real-index

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\the-real-index
                                • Size 384B
                                • SHA256 ec6c58f5999d80af6b13e43da7916da1562786befc9161de03420b7dce4180ae
                                • MD5 SHA1 SHA512

                                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 354B
                                • SHA256 53f042a0f00d35f62672906152e9ffb99538e5dd0e0a2a0d2f2c45bb4aa5e5de
                                • MD5 SHA1 SHA512

                                Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                • Size 9KB
                                • SHA256 a1fbf6b95fb4a39786b107903387f3a20fae812d4439f6f551b220e9b1900cc5
                                • MD5 SHA1 SHA512 SSDEEP

                                Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                • Size 9KB
                                • SHA256 ce277cdf196e373d17b7b9dbc1a9104d903848a3e184fe66ebe631a23b16255f
                                • MD5 SHA1 SHA512 SSDEEP

                                Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                • Size 9KB
                                • SHA256 51f508c5423b4a9907b0502539fd4077f866181052b20254328409470b807c60
                                • MD5 SHA1 SHA512 SSDEEP

                                Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                • Size 9KB
                                • SHA256 9ef4071ae541d7b18a78b7d90328c0c5523a6f25ab5ac9eacf1f6630fcbcd016
                                • MD5 SHA1 SHA512 SSDEEP

                                Secure Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Secure Preferences
                                • Size 15KB
                                • SHA256 c9aa2187196c865184eabfa4ed6cbefebbebfdc04de706de5d0b459d19f1772d
                                • MD5 SHA1 SHA512 SSDEEP

                                Local State

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                • Size 193KB
                                • SHA256 638d68a9a088d6427cb6bf1b6b793b72d87fb9602bbabf064ca0a9ee6a31d13c
                                • MD5 SHA1 SHA512 SSDEEP

                                Local State

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                • Size 193KB
                                • SHA256 7277c53d118af963f3cf32e14a2910228f172cdcf3268aeccfb40484b65a02eb
                                • MD5 SHA1 SHA512 SSDEEP

                                default.dic

                                • Path C:\Users\Admin\AppData\Roaming\Microsoft\Spelling\en-US\default.dic
                                • Size 2B
                                • SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
                                • MD5 SHA1 SHA512

                                memory/224-0-0x0000000000400000-0x00000000004D8000-memory.dmp