Resubmissions

25/11/2023, 12:15

231125-pe82qsae2410

25/11/2023, 12:14

231125-pedwlaad9810

25/11/2023, 11:56

231125-n316csba2110

Analysis

  • max time kernel
    27s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    25/11/2023, 11:56

General

  • Target
    Zul Free.exe
  • Size 230KB
  • Sample231125-n316csba21
  • SHA256 29456c78a229429c66b4ce8997c9bb6593ad9b4e8928e094eb25caf4a7ee0e40
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 2 IoCs
  • Umbral

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 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:2276
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1716
  • 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:2644
    • 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,0x7fef6869758,0x7fef6869768,0x7fef6869778
      2⤵
        PID:2588
      • 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=1124 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:2
        2⤵
          PID:1920
        • 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=1484 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
          2⤵
            PID:1632
          • 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=1576 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
            2⤵
              PID:2784
            • 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=2244 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:1
              2⤵
                PID:2232
              • 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=2268 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:1
                2⤵
                  PID:1948
                • 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=1332 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:2
                  2⤵
                    PID:1048
                  • 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=3180 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:1
                    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=2940 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
                      2⤵
                        PID:792
                      • 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=3524 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
                        2⤵
                          PID:3028
                        • 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=3632 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
                          2⤵
                            PID:2152
                          • 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=3700 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:1
                            2⤵
                              PID:2164
                            • 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=13 --mojo-platform-channel-handle=3688 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:1
                              2⤵
                                PID:2724
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --lang=en-US --service-sandbox-type=audio --mojo-platform-channel-handle=2436 --field-trial-handle=1288,i,17165605037797596597,12531170757350596637,131072 /prefetch:8
                                2⤵
                                  PID:2524
                              • 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:1764
                                • C:\Program Files\VideoLAN\VLC\vlc.exe
                                  "C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\ExportWait.mpe"
                                  1⤵
                                    PID:3044
                                  • C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE
                                    "C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE" "C:\Users\Admin\Desktop\StepCompress.pptx"
                                    1⤵
                                      PID:2652
                                      • C:\Windows\splwow64.exe
                                        C:\Windows\splwow64.exe 12288
                                        2⤵
                                          PID:1032

                                      Network

                                            MITRE ATT&CK Enterprise v15

                                            Replay Monitor

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                                            Downloads

                                            the-real-index~RFf775bb7.TMP

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\the-real-index~RFf775bb7.TMP
                                            • Size 168B
                                            • SHA256 07f2dc3a6869b233fc0262d3ae55fb53161eb2ad73f09af41ebcd8c99f1b3b0c
                                            • MD5 SHA1 SHA512

                                            data_1

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
                                            • Size 264KB
                                            • SHA256 b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
                                            • MD5 SHA1 SHA512 SSDEEP

                                            TransportSecurity

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                            • Size 527B
                                            • SHA256 b090bad26084d965b84141891c2e35c8de224f7696a1b382f467b6a63fc4380d
                                            • MD5 SHA1 SHA512

                                            Preferences

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                            • Size 4KB
                                            • SHA256 b2bc2ba042f47769e6d7e949b9d85e032fcaf25b447e3377a5ab031ac90ae553
                                            • MD5 SHA1 SHA512 SSDEEP

                                            000007.dbtmp

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp
                                            • Size 16B
                                            • SHA256 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa
                                            • MD5 SHA1 SHA512

                                            d4d1a0a3-59e2-4b67-85a9-156beeefb563.tmp

                                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\d4d1a0a3-59e2-4b67-85a9-156beeefb563.tmp
                                            • Size 5KB
                                            • SHA256 0e558aafd9f1b7745c054fdd3906875590ba04346683483e607b1592c01e619d
                                            • MD5 SHA1 SHA512 SSDEEP

                                            memory/2276-0-0x0000000000D10000-0x0000000000D50000-memory.dmp

                                            memory/2276-1-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

                                            memory/2276-2-0x00000000021D0000-0x0000000002250000-memory.dmp

                                            memory/2276-3-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

                                            memory/2652-182-0x000000005FFF0000-0x0000000060000000-memory.dmp

                                            memory/2652-181-0x000000002D811000-0x000000002D812000-memory.dmp

                                            memory/2652-183-0x00000000720FD000-0x0000000072108000-memory.dmp

                                            memory/2652-193-0x000000005FFF0000-0x0000000060000000-memory.dmp

                                            memory/2652-194-0x00000000720FD000-0x0000000072108000-memory.dmp

                                            memory/3044-179-0x000007FEF28E0000-0x000007FEF398B000-memory.dmp

                                            memory/3044-180-0x000007FEF1B80000-0x000007FEF1C92000-memory.dmp

                                            memory/3044-178-0x000007FEF3990000-0x000007FEF3C44000-memory.dmp

                                            memory/3044-177-0x000007FEF4610000-0x000007FEF4644000-memory.dmp

                                            memory/3044-176-0x000000013FD60000-0x000000013FE58000-memory.dmp