Resubmissions

23/11/2023, 02:57

231123-dfxvbaff2910

23/11/2023, 02:50

231123-dbwrfsgd2w1

Analysis

  • max time kernel
    124s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/11/2023, 02:57

General

  • Target
    http://burnwomanburn.com/wp-content/uploads/2023/set.html
  • Sample231123-dfxvbaff29

Malware Config

Extracted

Family
  • kutaki

C2
  • http://treysbeatend.com/laptop/squared.php

  • http://terebinnahicc.club/sec/kool.txt

Signatures

  • Kutaki

    Information stealer and keylogger that hides inside legitimate Visual Basic applications.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://burnwomanburn.com/wp-content/uploads/2023/set.html
    1⤵
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2592
    • 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=0xfc,0x100,0x104,0xd8,0x108,0x7ffb86069758,0x7ffb86069768,0x7ffb86069778
      2⤵
        PID:1184
      • 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=1708 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:2
        2⤵
          PID:1740
        • 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=2020 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
          2⤵
            PID:4568
          • 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=2208 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
            2⤵
              PID:4904
            • 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=2968 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:1
              2⤵
                PID:3788
              • 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=2960 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:1
                2⤵
                  PID:4192
                • 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=7 --mojo-platform-channel-handle=4732 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:1
                  2⤵
                    PID:5032
                  • 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=8 --mojo-platform-channel-handle=4924 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:1
                    2⤵
                      PID:3540
                    • 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 --mojo-platform-channel-handle=5276 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
                      2⤵
                        PID:2976
                      • 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=4852 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
                        2⤵
                          PID:1524
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5624 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
                          2⤵
                            PID:1784
                          • 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=3900 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:8
                            2⤵
                              PID:3888
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAACQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2476 --field-trial-handle=1868,i,9711287868433455662,854566212103849703,131072 /prefetch:2
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:1988
                          • 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:3436
                            • C:\Windows\System32\rundll32.exe
                              C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                              1⤵
                                PID:3564
                              • C:\Users\Admin\AppData\Local\Temp\Temp1_INF_NEFT_Invoice.zip\INF_NEFT_Invoice.bat
                                "C:\Users\Admin\AppData\Local\Temp\Temp1_INF_NEFT_Invoice.zip\INF_NEFT_Invoice.bat"
                                1⤵
                                • Drops startup file
                                • Suspicious use of SetWindowsHookEx
                                PID:4792
                                • C:\Windows\SysWOW64\cmd.exe
                                  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                  2⤵
                                    PID:2216
                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gpuxxvfk.exe
                                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gpuxxvfk.exe"
                                    2⤵
                                    • Executes dropped EXE
                                    • Suspicious use of SetWindowsHookEx
                                    PID:3408

                                Network

                                      MITRE ATT&CK Enterprise v15

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      Network Persistent State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State
                                      • Size 1KB
                                      • SHA256 38444f55f7857578843baf09d92b740c52c6980db7280f587c8395c49a89bbd6
                                      • MD5 SHA1 SHA512

                                      TransportSecurity

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                      • Size 705B
                                      • SHA256 be443eab1b7589e941f07e734b71b0a2bf712c0f1df502043d542444aabba457
                                      • MD5 SHA1 SHA512

                                      Preferences

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                      • Size 6KB
                                      • SHA256 876053a7abeb7dd138224645cbcddd78091b213940c83aa116064b37c76a2b8a
                                      • MD5 SHA1 SHA512 SSDEEP

                                      Local State

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                      • Size 214KB
                                      • SHA256 00da7ae0cae585741f2680d15d02a367697a94030f8388f19d086bb8ad4b01c3
                                      • MD5 SHA1 SHA512 SSDEEP

                                      Module Info Cache

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache
                                      • Size 110KB
                                      • SHA256 d7187042ca3f02dbba908b997fb438544376976c6f7d675899721b6defaf7d3e
                                      • MD5 SHA1 SHA512 SSDEEP

                                      Module Info Cache~RFe582844.TMP

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe582844.TMP
                                      • Size 107KB
                                      • SHA256 9a616264859c4406862f0646d4c189a0f815976a2e607f093471227e8f7ac720
                                      • MD5 SHA1 SHA512 SSDEEP

                                      persisted_first_party_sets.json

                                      • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\persisted_first_party_sets.json
                                      • Size 2B
                                      • SHA256 44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a
                                      • MD5 SHA1 SHA512

                                      gpuxxvfk.exe

                                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gpuxxvfk.exe
                                      • Size 2.4MB
                                      • SHA256 e853852e378eb31800ac04c7e2e81649fb0b36040e8fb95f9f50c21c2e603b92
                                      • MD5 SHA1 SHA512 SSDEEP

                                      gpuxxvfk.exe

                                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gpuxxvfk.exe
                                      • Size 2.4MB
                                      • SHA256 e853852e378eb31800ac04c7e2e81649fb0b36040e8fb95f9f50c21c2e603b92
                                      • MD5 SHA1 SHA512 SSDEEP

                                      INF_NEFT_Invoice.zip

                                      • Path C:\Users\Admin\Downloads\INF_NEFT_Invoice.zip
                                      • Size 2.1MB
                                      • SHA256 181bba3337297ea023f1318f62bef7d53225ed92854b024399df71857382f49e
                                      • MD5 SHA1 SHA512 SSDEEP