Analysis

  • max time kernel
    103s
  • max time network
    95s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-09-2023 01:25

General

  • Target

    http://nkwaterproofing.com/gol

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 7 IoCs
  • Executes dropped EXE 3 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
  • Kills process with taskkill 2 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 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 21 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Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://nkwaterproofing.com/gol
    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:1812
    • 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=0xcc,0xd0,0xd4,0xa8,0xd8,0x7ffd403f9758,0x7ffd403f9768,0x7ffd403f9778
      2⤵
        PID:4764
      • 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=1824 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:8
        2⤵
          PID:4632
        • 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=1528 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:2
          2⤵
            PID:3420
          • 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=2080 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:8
            2⤵
              PID:168
            • 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=2712 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:1
              2⤵
                PID:4108
              • 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=2728 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:1
                2⤵
                  PID:4836
                • 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=3908 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:1
                  2⤵
                    PID:3336
                  • 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=4872 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:8
                    2⤵
                      PID:3432
                    • 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=2940 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:8
                      2⤵
                        PID:2156
                      • 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=4572 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:8
                        2⤵
                          PID:2808
                        • 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=11 --mojo-platform-channel-handle=4576 --field-trial-handle=1768,i,5690833229306915160,12982845715476658086,131072 /prefetch:1
                          2⤵
                            PID:3020
                        • 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:5088
                          • C:\Windows\System32\rundll32.exe
                            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                            1⤵
                              PID:4256
                            • C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat
                              "C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat"
                              1⤵
                              • Drops startup file
                              • Suspicious use of SetWindowsHookEx
                              PID:1284
                              • C:\Windows\SysWOW64\cmd.exe
                                cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                2⤵
                                  PID:1052
                                • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe
                                  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe"
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious use of SetWindowsHookEx
                                  PID:1580
                              • C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat
                                "C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat"
                                1⤵
                                • Drops startup file
                                • Suspicious use of SetWindowsHookEx
                                PID:2188
                                • C:\Windows\SysWOW64\cmd.exe
                                  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                  2⤵
                                    PID:1528
                                  • C:\Windows\SysWOW64\taskkill.exe
                                    taskkill /im oajldbfk.exe /f
                                    2⤵
                                    • Kills process with taskkill
                                    PID:352
                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe
                                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe"
                                    2⤵
                                    • Executes dropped EXE
                                    • Suspicious use of SetWindowsHookEx
                                    PID:4004
                                • C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat
                                  "C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat"
                                  1⤵
                                  • Drops startup file
                                  • Suspicious use of SetWindowsHookEx
                                  PID:3968
                                  • C:\Windows\SysWOW64\cmd.exe
                                    cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                    2⤵
                                      PID:2540
                                    • C:\Windows\SysWOW64\taskkill.exe
                                      taskkill /im oajldbfk.exe /f
                                      2⤵
                                      • Kills process with taskkill
                                      PID:4340
                                  • C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat
                                    "C:\Users\Admin\AppData\Local\Temp\Temp1_HDFC_9530.zip\HDFC_9530.bat"
                                    1⤵
                                    • Drops startup file
                                    • Suspicious use of SetWindowsHookEx
                                    PID:4532
                                    • C:\Windows\SysWOW64\cmd.exe
                                      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                      2⤵
                                        PID:8
                                      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe
                                        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe"
                                        2⤵
                                        • Executes dropped EXE
                                        • Suspicious use of SetWindowsHookEx
                                        PID:1420

                                    Network

                                    MITRE ATT&CK Enterprise v15

                                    Replay Monitor

                                    Loading Replay Monitor...

                                    Downloads

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

                                      Filesize

                                      1KB

                                      MD5

                                      f6f471a27f4fd9f096031f017def3393

                                      SHA1

                                      ba9133d76087d0bc45295c3dc1c1b747e2a1ed82

                                      SHA256

                                      d1c52daba69c6611f65c0c884b8151c3e756f8658406d555b9c42c4a095d6d78

                                      SHA512

                                      d07c102d7cdb99455a12a3f0df73f858b6fb8628d1faec7232d9a3b9176ef8480e8b64f515bb630aee614a4c26ef6a6ef57dcc170d2f4b859daf2b186f235b2b

                                    • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity

                                      Filesize

                                      705B

                                      MD5

                                      28136218163a4ec6dfa657ab1afb210d

                                      SHA1

                                      2f18d5e853482a0d74e1fd79b84a0b086bc00fcb

                                      SHA256

                                      a1ead8c270a639e69f614a704d4617226cc7beb2672556a402763e9a32bab6b7

                                      SHA512

                                      e58c0b9c6fe1eca2127afd4c8c5108055b795d09077b41c5dbadc668ffc4640ca21971847fb546cb196b7720af7143fdc6a3f0b66c23f3810b6d22127edc8374

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

                                      Filesize

                                      5KB

                                      MD5

                                      a198ad0914c29c67bbdf8589e15dd7d3

                                      SHA1

                                      1ffdcdc942fbc9dd3e2e181a0c798650be57fed2

                                      SHA256

                                      4f449868b487339ee9f7ce28f75b32f0126c28198b5e331d48fd25bfe4d1493a

                                      SHA512

                                      609fb6872c21571772970715cc590d2e08e4c58c9501254d7c0af7204ff2457d7f696c216e6fcf28eb758a91da55cc7e2fdada7cc9f40daf4b1c0df393187b5d

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

                                      Filesize

                                      6KB

                                      MD5

                                      62b7f635206db612eef132852203b7fd

                                      SHA1

                                      56bb753b21523622498dac3d794df80fbe7da3dd

                                      SHA256

                                      2272bc016c499bb1aaa478f5974a95adf270cbfb61e52a0778cb3a9137a92cff

                                      SHA512

                                      eca611dabb63a1583e427dac2362135048c97e78d767fcd905303b6eb11bedf2deaade098abdbd1876e7f24938e2756a308138f9c60b6e512b48d00a94a5871a

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

                                      Filesize

                                      6KB

                                      MD5

                                      46339857af4049b87a8a04254371689f

                                      SHA1

                                      229736fb70fa8efd4c7c7ff97f2ae2f06c16bbfb

                                      SHA256

                                      b75812b159449f9c868e88c33b55dbb9baf4630ad838f934879142ce90c9fc68

                                      SHA512

                                      49252a8443c55d2aecc27d3293bd46832ac4397b4f209e1c68fda4a1f07128f2112ad17d337b8fca576bdbbfaa2bbbd8051ff1f15fec1c80f6a1fcdda0b70ddb

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

                                      Filesize

                                      101KB

                                      MD5

                                      85e99cbebb599121472ec257819044cb

                                      SHA1

                                      4b3dc809df4b1f981361dd528f5e74382bdb0e95

                                      SHA256

                                      16dd1d158b2b3d1a82efced76eeecd8ce395134475874c987681818c9b8071c6

                                      SHA512

                                      2d837cd4a4d8169b89d2010ef3be4837579f41eecedd523e01f828395c8d4b793fe662ea5a00506ebb3cd50f42884518426f50ddaa72e5f6b44b40efa241fdf2

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

                                      Filesize

                                      101KB

                                      MD5

                                      ce29ebb22b216bd2c3d1df74ae5905fb

                                      SHA1

                                      6b59fa467d19b725ebf312ce1cf181a15a4b3341

                                      SHA256

                                      946d334109e38576ae831d0aa8d844c67c4a44d95b6f6929f6d6803e92a289dd

                                      SHA512

                                      efab8a3bb83b0918bc85fa64b3a4fe875f3006f2674ce7a92b5b75ef7f33a37a819f728ada7b2b4b3c494cc821b5bf19fb05c0e12b105c153b434dfea6b3d091

                                    • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\persisted_first_party_sets.json

                                      Filesize

                                      2B

                                      MD5

                                      99914b932bd37a50b983c5e7c90ae93b

                                      SHA1

                                      bf21a9e8fbc5a3846fb05b4fa0859e0917b2202f

                                      SHA256

                                      44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a

                                      SHA512

                                      27c74670adb75075fad058d5ceaf7b20c4e7786c83bae8a32f626f9782af34c9a33c2046ef60fd2a7878d378e29fec851806bbd9a67878f3a9f1cda4830763fd

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oajldbfk.exe

                                      Filesize

                                      2.9MB

                                      MD5

                                      c8259cf08039e670e470edbb886f4dce

                                      SHA1

                                      ea0328fb5f777cd5ada12746d9e1d3ba087ddddf

                                      SHA256

                                      4e0cf82c796f432952a47ae7572e7ff1189627db4c053974e613c2b79ee5737f

                                      SHA512

                                      edb780458a109b3a39f50a9f319a5a4dbd748351f87ddc4815a888da5d069d87701a66e5fbe417e45786adfc5aef68c44bae510e6e83faaeeea9ec7d450249df

                                    • C:\Users\Admin\Downloads\HDFC_9530.zip.crdownload

                                      Filesize

                                      2.6MB

                                      MD5

                                      f3d1811977175d4d6e593401b6595e29

                                      SHA1

                                      bc8e9442033381369b6210a4764d30acf53250f2

                                      SHA256

                                      c033db4e6584d8d0bc475b6b717ce1401adf72f2ca6ff2b8cff4049e9566bebd

                                      SHA512

                                      40e6368402d8b86db45f58d368b148ddee27143c53b7d4c2273375bd3203c36e88c843790952f3942ca635bd4fe966ebf47256f0a29701b72d2611d7562c7682