Resubmissions

31-03-2023 20:37

230331-zedkyadc34 7

31-03-2023 20:34

230331-zcqgqaee9t 7

31-03-2023 20:32

230331-zbentsdb88 7

31-03-2023 20:28

230331-y8zvladb76 7

Analysis

  • max time kernel
    115s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    31-03-2023 20:34

General

  • Target

    MEMZ.exe

  • Size

    12KB

  • MD5

    a7bcf7ea8e9f3f36ebfb85b823e39d91

  • SHA1

    761168201520c199dba68add3a607922d8d4a86e

  • SHA256

    3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

  • SHA512

    89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

  • SSDEEP

    192:HMDLTxWDf/pl3cIEiwqZKBktLe3P+qf2jhP6B5b2yL3:H4IDH3cIqqvUWq+jhyT2yL

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). Likely ransomware behaviour.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of SetWindowsHookEx 3 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:1040
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:860
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:564
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:528
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:1668
    • C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
      "C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:524
    • 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:556
      • C:\Windows\SysWOW64\notepad.exe
        "C:\Windows\System32\notepad.exe" \note.txt
        3⤵
          PID:1720
        • C:\Windows\SysWOW64\mmc.exe
          "C:\Windows\System32\mmc.exe"
          3⤵
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1032
          • C:\Windows\system32\mmc.exe
            "C:\Windows\system32\mmc.exe"
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:336
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1500
      • 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,0x7fefb149758,0x7fefb149768,0x7fefb149778
        2⤵
          PID:924
        • 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=1228 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:2
          2⤵
            PID:1012
          • 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=1500 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:8
            2⤵
              PID:1536
            • 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=1672 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:8
              2⤵
                PID:1996
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2216 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:1
                2⤵
                  PID:1032
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2244 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:1
                  2⤵
                    PID:1904
                  • 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=1328 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:2
                    2⤵
                      PID:2088
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1320 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:1
                      2⤵
                        PID:2180
                      • 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=3896 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:8
                        2⤵
                          PID:2252
                        • 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=3884 --field-trial-handle=1344,i,823491534379223998,2108379032519450244,131072 /prefetch:8
                          2⤵
                            PID:2300
                        • 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:1608
                          • C:\Windows\system32\AUDIODG.EXE
                            C:\Windows\system32\AUDIODG.EXE 0x53c
                            1⤵
                              PID:2456

                            Network

                            MITRE ATT&CK Matrix ATT&CK v6

                            Persistence

                            Bootkit

                            1
                            T1067

                            Discovery

                            System Information Discovery

                            2
                            T1082

                            Query Registry

                            1
                            T1012

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\197f7a4b-34ea-4a06-bab2-d207895a3b98.tmp
                              Filesize

                              173KB

                              MD5

                              a424b48ce0bd0e43aab41a5962266dea

                              SHA1

                              b25e67c229545ca2be18770d2498cb05390e614d

                              SHA256

                              ef0894e6dc2ebceb00e06dc54e3f43f5cdb12c3f90c393f49fa4a62919611c2a

                              SHA512

                              188d0fed16410bf56966d1cbc2e5fe7563c8485df4d9c959e57ec0bc406b7cd6e46a991b06658c82d7fe5982f76f201d410d0fda8ddafb61374a75a49b2e2f16

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

                              264KB

                              MD5

                              f50f89a0a91564d0b8a211f8921aa7de

                              SHA1

                              112403a17dd69d5b9018b8cede023cb3b54eab7d

                              SHA256

                              b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                              SHA512

                              bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                              4KB

                              MD5

                              6fdd3fb7569918c679b8a1a3cbca174b

                              SHA1

                              2e4e5f981f5be1b845190a952c53f9cd78593bc6

                              SHA256

                              17be57a9a75cad91b98a9334d4fcffc1989c3dba79cbad1a9dee4b20efb385a1

                              SHA512

                              6a7f61b9a407fe37bbc7a2ce5352b591f9eb38ce8a09bcd155f2b8620de61b7e38a5d803e767238feb3e645f3745dda16c752d40f29efce7408012500545a688

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

                              4KB

                              MD5

                              b0ee5362e94517f1a09be5b883246269

                              SHA1

                              4b102dca75f1b9ebcb508915ec5203b908f5548d

                              SHA256

                              4cbb2be2f335b095764f341aab2bb0d219ba8c6055e412101a7d725f13ce0b14

                              SHA512

                              ec7bd47df0c29ea849c10aecc519d08ec066891b5b44c78c3e42d50886754f1ee8f940758a45c5d82b501f0eb0f30ba3b2d96b4fc2c29190bd95c60cda215b95

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000004.dbtmp
                              Filesize

                              16B

                              MD5

                              6752a1d65b201c13b62ea44016eb221f

                              SHA1

                              58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                              SHA256

                              0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                              SHA512

                              9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                              Filesize

                              173KB

                              MD5

                              42ec3078976e59073746a89bd487be8f

                              SHA1

                              db5642c71a0383079ebe7ec573445a3c854117c5

                              SHA256

                              ee0558de2d1253c204e2b48f62d5fac43477399253a8a10d394403d84eea0ced

                              SHA512

                              de3c9b6f1a48dc30c823206d792622a9864ccbc7d4a75680fbd890abf7fcf45d9683af0be0bb86db13ae14c62ffa21e2fe69525b267c2debcc0c22ffbe06991c

                            • C:\note.txt
                              Filesize

                              218B

                              MD5

                              afa6955439b8d516721231029fb9ca1b

                              SHA1

                              087a043cc123c0c0df2ffadcf8e71e3ac86bbae9

                              SHA256

                              8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270

                              SHA512

                              5da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf

                            • \??\pipe\crashpad_1500_AKBKCHTMPAGZHDOW
                              MD5

                              d41d8cd98f00b204e9800998ecf8427e

                              SHA1

                              da39a3ee5e6b4b0d3255bfef95601890afd80709

                              SHA256

                              e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                              SHA512

                              cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                            • memory/336-56-0x0000000002020000-0x0000000002021000-memory.dmp
                              Filesize

                              4KB