Resubmissions

25/11/2023, 12:15

231125-pe82qsae24 10

25/11/2023, 12:14

231125-pedwlaad98 10

25/11/2023, 11:56

231125-n316csba21 10

Analysis

  • max time kernel
    97s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    25/11/2023, 12:15

General

  • Target

    Zul Free.exe

  • Size

    230KB

  • MD5

    a47cffac2602038b4cfc070f8a05243a

  • SHA1

    4111453f445d10ef516e98a000cc84845658dabe

  • SHA256

    29456c78a229429c66b4ce8997c9bb6593ad9b4e8928e094eb25caf4a7ee0e40

  • SHA512

    e390d7c96e2b5b2cad52b80c276787cb37d7ca3a171868037c1f1ef9e58177baa9e07f8866e0a95560ee9e0af0a38ba218f9feeaf1f19d77915f9e5c08d4070d

  • SSDEEP

    6144:1loZM+rIkd8g+EtXHkv/iD4tT1FzQEbqCzFQMpxbztjFK8e1mOvi:XoZtL+EP8tT1FzQEbqCzFQMpVpjy0

Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Drops file in System32 directory 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of FindShellTrayWindow 44 IoCs
  • Suspicious use of SendNotifyMessage 41 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Zul Free.exe
    "C:\Users\Admin\AppData\Local\Temp\Zul Free.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1728
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2748
  • C:\Program Files\VideoLAN\VLC\vlc.exe
    "C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\ClearSubmit.M2V"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:2892
  • C:\Windows\system32\mmc.exe
    "C:\Windows\system32\mmc.exe" "C:\Windows\system32\perfmon.msc" /s
    1⤵
    • Drops file in System32 directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2992
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1632
    • 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,0x7fef4b19758,0x7fef4b19768,0x7fef4b19778
      2⤵
        PID:1792
      • 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=1180 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:2
        2⤵
          PID:2312
        • 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=1504 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:8
          2⤵
            PID:2132
          • 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=1588 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:8
            2⤵
              PID:916
            • 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=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2264 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:1
              2⤵
                PID:1668
              • 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=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2256 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:1
                2⤵
                  PID:1540
                • 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=1708 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:2
                  2⤵
                    PID:2752
                  • 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=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=3212 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:1
                    2⤵
                      PID:2616
                    • 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=3448 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:8
                      2⤵
                        PID:2824
                      • 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=3456 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:8
                        2⤵
                          PID:3008
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe" --reenable-autoupdates --system-level
                          2⤵
                            PID:2892
                            • C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe
                              "C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0x154,0x158,0x15c,0x128,0x160,0x13f5d7688,0x13f5d7698,0x13f5d76a8
                              3⤵
                                PID:1692
                            • 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 --mojo-platform-channel-handle=2820 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:8
                              2⤵
                                PID:276
                              • 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=4 --enable-main-frame-before-activation --renderer-client-id=12 --mojo-platform-channel-handle=3816 --field-trial-handle=1200,i,7910055864252911779,14671644813393539284,131072 /prefetch:1
                                2⤵
                                  PID:1660
                              • 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:280

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\7d00a9fb-eb06-46ba-9f9e-50cb5c211832.tmp

                                  Filesize

                                  220KB

                                  MD5

                                  d93624448b065094cec40f3fd248ccb2

                                  SHA1

                                  ccb6b413fbc4c1ab89e4f31194a65fcc17a54aa8

                                  SHA256

                                  a5fe4c8225589351eb1d0a401ac7249289ab8dd55ada3c97f377546c0bda77fb

                                  SHA512

                                  d0425ea0dda1373689cd5919e1b2bc1edaf9c5ff256c28f2fc26ce967ad26a655071c6ed48dd009cf7682dc692f8a8aa8f1eeaf87442ebd377683490722ead4b

                                • 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

                                  5KB

                                  MD5

                                  0a607b61672c1994869c40ed5f21a7eb

                                  SHA1

                                  83590af70e8eae51ab4ccd9be46ff8978ae94d20

                                  SHA256

                                  e61dfba7dbb2b31b46b941ff828d7a6578df5e370a8924a04bc7ee0b6e4b043f

                                  SHA512

                                  f31134bcb730266868ef4009a079a19e9c8165270c8dbd09cd36a0c48a7b8d04d39f4ba0a91b0687775c789a40a8777356392e7d66d68c46d1b5e54f0158b9bc

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000007.dbtmp

                                  Filesize

                                  16B

                                  MD5

                                  18e723571b00fb1694a3bad6c78e4054

                                  SHA1

                                  afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                                  SHA256

                                  8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                                  SHA512

                                  43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

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

                                  Filesize

                                  220KB

                                  MD5

                                  fabb5b5fb772ef3125ce1d39870dccf6

                                  SHA1

                                  6e4393271b632ed46c2befc34021af4ae366119d

                                  SHA256

                                  6a00bd7bd35be71e6a19b9e21107e34b2ba1ba11fde6febeaebcb5844d6352a5

                                  SHA512

                                  dd69a7374041d5aaa89eef54bb9b1984354bdd6dacac9c1bb15b3a32bc695eda8927cb55aa0feb0e7413186aef84fc224a5b44efd54e734ca8c58c9f92e2f64e

                                • memory/1728-1-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/1728-2-0x000000001B210000-0x000000001B290000-memory.dmp

                                  Filesize

                                  512KB

                                • memory/1728-3-0x000007FEF57D0000-0x000007FEF61BC000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/1728-0-0x00000000009D0000-0x0000000000A10000-memory.dmp

                                  Filesize

                                  256KB

                                • memory/2892-16-0x000000013FF10000-0x0000000140008000-memory.dmp

                                  Filesize

                                  992KB

                                • memory/2892-20-0x000007FEF3570000-0x000007FEF3682000-memory.dmp

                                  Filesize

                                  1.1MB

                                • memory/2892-19-0x000007FEF40F0000-0x000007FEF519B000-memory.dmp

                                  Filesize

                                  16.7MB

                                • memory/2892-18-0x000007FEF5650000-0x000007FEF5904000-memory.dmp

                                  Filesize

                                  2.7MB

                                • memory/2892-17-0x000007FEF5910000-0x000007FEF5944000-memory.dmp

                                  Filesize

                                  208KB

                                • memory/2992-46-0x0000000002210000-0x0000000002211000-memory.dmp

                                  Filesize

                                  4KB

                                • memory/2992-40-0x000007FFFFF60000-0x000007FFFFF70000-memory.dmp

                                  Filesize

                                  64KB

                                • memory/2992-21-0x0000000002210000-0x0000000002211000-memory.dmp

                                  Filesize

                                  4KB