Analysis

  • max time kernel
    58s
  • max time network
    57s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/03/2024, 17:15

General

  • Target
    MEMZ.exe
  • Size 16KB
  • Sample240309-vszm4sda87
  • SHA256 3872c12d31fc9825e8661ac01ecee2572460677afbc7093f920a8436a42e28ff
  • MD5 SHA1 SHA512 SSDEEP
Score
6/10

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.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
    "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2320
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:1812
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:5044
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:4476
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:1384
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:2028
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /main
      2⤵
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of WriteProcessMemory
      PID:3132
      • C:\Windows\SysWOW64\notepad.exe
        "C:\Windows\System32\notepad.exe" \note.txt
        3⤵
          PID:2192
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://google.co.ck/search?q=bonzi+buddy+download+free
          3⤵
          • Enumerates system info in registry
          • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of WriteProcessMemory
          PID:2344
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=90.0.4430.212 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=90.0.818.66 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7ffd60553cb8,0x7ffd60553cc8,0x7ffd60553cd8
            4⤵
              PID:5000
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1824 /prefetch:2
              4⤵
                PID:2140
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2388 /prefetch:3
                4⤵
                  PID:5020
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2684 /prefetch:8
                  4⤵
                    PID:2212
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3220 /prefetch:1
                    4⤵
                      PID:924
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3244 /prefetch:1
                      4⤵
                        PID:1828
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4648 /prefetch:1
                        4⤵
                          PID:4184
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4980 /prefetch:1
                          4⤵
                            PID:3444
                          • C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.66\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5488 /prefetch:8
                            4⤵
                              PID:964
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1744,13700961240759815767,15032049410609335181,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3500 /prefetch:8
                              4⤵
                                PID:776
                        • C:\Windows\System32\CompPkgSrv.exe
                          C:\Windows\System32\CompPkgSrv.exe -Embedding
                          1⤵
                            PID:1808
                          • C:\Windows\System32\CompPkgSrv.exe
                            C:\Windows\System32\CompPkgSrv.exe -Embedding
                            1⤵
                              PID:236

                            Network

                                  MITRE ATT&CK Enterprise v15

                                  Replay Monitor

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                                  Downloads

                                  settings.dat

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                  • Size 152B
                                  • SHA256 7fccd8c81f41a2684315ad9c86ef0861ecf1f2bf5d13050f760f52aef9b4a263
                                  • MD5 SHA1 SHA512

                                  settings.dat

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                  • Size 152B
                                  • SHA256 5694744f7e6c49068383af6569df880eed386f56062933708c8716f4221cac61
                                  • MD5 SHA1 SHA512

                                  f_000003

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Cache\f_000003
                                  • Size 194KB
                                  • SHA256 845aa24ba38524f33f097b0d9bae7d9112b01fa35c443be5ec1f7b0da23513e6
                                  • MD5 SHA1 SHA512 SSDEEP

                                  Preferences

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                  • Size 5KB
                                  • SHA256 81fc3e4d3559d1c8350956a4db8af50eb7cd1faa44baa1a6f45326e7749cc350
                                  • MD5 SHA1 SHA512 SSDEEP

                                  Preferences

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                  • Size 6KB
                                  • SHA256 8d9112c6b91852019c2363fcea49ddec4aa46287acea7b883f5a4e57358bd245
                                  • MD5 SHA1 SHA512 SSDEEP

                                  CURRENT

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT
                                  • Size 16B
                                  • SHA256 0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd
                                  • MD5 SHA1 SHA512

                                  Local State

                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State
                                  • Size 11KB
                                  • SHA256 7ac5cd46e2906a613aaa99b08cfc0e428204e0552ce148ececaf6b1d777f8454
                                  • MD5 SHA1 SHA512 SSDEEP

                                  note.txt

                                  • Path C:\note.txt
                                  • Size 218B
                                  • SHA256 8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270
                                  • MD5 SHA1 SHA512