Analysis

  • max time kernel
    59s
  • max time network
    55s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    21-09-2023 02:40

General

  • Target

    http://4deshebrases.za.com/uurik

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 4 IoCs
  • Executes dropped EXE 2 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 1 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 12 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Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://4deshebrases.za.com/uurik
    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:3352
    • 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,0xd0,0xd4,0xa8,0xd8,0x7ffcc8a69758,0x7ffcc8a69768,0x7ffcc8a69778
      2⤵
        PID:4352
      • 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=1616 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:2
        2⤵
          PID:4460
        • 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=1784 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:8
          2⤵
            PID:1288
          • 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=2100 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:8
            2⤵
              PID:5016
            • 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=2784 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:1
              2⤵
                PID:3200
              • 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=2740 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:1
                2⤵
                  PID:4452
                • 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=3952 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:1
                  2⤵
                    PID:1148
                  • 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=5204 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:8
                    2⤵
                      PID:2728
                    • 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=5260 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:8
                      2⤵
                        PID:2108
                      • 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=5188 --field-trial-handle=1840,i,14396798628981681928,3094588708241144018,131072 /prefetch:8
                        2⤵
                          PID:1400
                      • 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:2124
                        • C:\Windows\System32\rundll32.exe
                          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                          1⤵
                            PID:2588
                          • C:\Users\Admin\AppData\Local\Temp\Temp1_Inv No 46281.zip\Inv No 46281.bat
                            "C:\Users\Admin\AppData\Local\Temp\Temp1_Inv No 46281.zip\Inv No 46281.bat"
                            1⤵
                            • Drops startup file
                            • Suspicious use of SetWindowsHookEx
                            PID:3792
                            • C:\Windows\SysWOW64\cmd.exe
                              cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                              2⤵
                                PID:4996
                              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zgwiztfk.exe
                                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zgwiztfk.exe"
                                2⤵
                                • Executes dropped EXE
                                • Suspicious use of SetWindowsHookEx
                                PID:4232
                            • C:\Users\Admin\AppData\Local\Temp\Temp1_Inv No 46281.zip\Inv No 46281.bat
                              "C:\Users\Admin\AppData\Local\Temp\Temp1_Inv No 46281.zip\Inv No 46281.bat"
                              1⤵
                              • Drops startup file
                              • Suspicious use of SetWindowsHookEx
                              PID:4916
                              • C:\Windows\SysWOW64\cmd.exe
                                cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                2⤵
                                  PID:3888
                                • C:\Windows\SysWOW64\taskkill.exe
                                  taskkill /im zgwiztfk.exe /f
                                  2⤵
                                  • Kills process with taskkill
                                  • Suspicious use of AdjustPrivilegeToken
                                  PID:5108
                                • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zgwiztfk.exe
                                  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zgwiztfk.exe"
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious use of SetWindowsHookEx
                                  PID:2780

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

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                              Downloads

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

                                Filesize

                                703B

                                MD5

                                c61aaa70c8112eb305416a4517b7c463

                                SHA1

                                6f795fd21a2c4a22fc17c71a3218674d046db751

                                SHA256

                                f342ab576ba5cf53fdb3571f8b224c69b8602128eac7373a81c4238f4bda003e

                                SHA512

                                3d4e4745c1e51d5c1bf108ae62bb698864028c9ef70a2c218b4ee6865e901b56874a4839c6c74e09d5bc4d6be449734a1f308f231d5d7f226078416c18f5f9b9

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

                                Filesize

                                5KB

                                MD5

                                6fed550f65f72a421eb2d32e2a95949e

                                SHA1

                                db5765f382afe16bc679aa250e47b92c4d9a1e93

                                SHA256

                                bffc9eeda1aded28675d5bad3b598ff7faeb0b7290670844ac4992e5e834c495

                                SHA512

                                c497cc76a13a24fac145f7d559b572eddb37db6f23a27fb164735dcb094e02ad4f2c2cc692c49be0e0b99d6c25df96c42900ebfa2b7806ea0c5aa5aa1698fcd3

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

                                Filesize

                                6KB

                                MD5

                                f1c0de5b9de5ab46852cb309aba3a71d

                                SHA1

                                c16d45d561720733189fa00a5e011b92057037fc

                                SHA256

                                59437d1ac52ca522a058512ed6c47db83a64e1ebc56005f2daa6fa70d5d21510

                                SHA512

                                f3b01942cc956e8aeadd25059ab3bdefac45713c5d3d8eb40dbca7820231ee6135a6993835faefdf4425e92eda73bd0a4e01f1908f96cb9e85bfa171133bcefc

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

                                Filesize

                                102KB

                                MD5

                                699616653d3e14334fdefbb4cfd9e1c9

                                SHA1

                                ecb017fbd00ebf6844181363c815ab643a550258

                                SHA256

                                4192fe63e60265da92f8d0370f42a07d0aca1193e0bbead448fb2b1edfd868ec

                                SHA512

                                ad2551541d818db2254e09a776041ff62a46627a0b65f523be8b58f0f2f14714b14b7be4153fd73512c5fe8c3d6896937bea4dd584cf1145d601babf619d2bff

                              • 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\zgwiztfk.exe

                                Filesize

                                2.6MB

                                MD5

                                9c55c5482f2599282613a9677dc9010c

                                SHA1

                                441e9706756e28d2112f60e1a5fe3c0ed4368a8c

                                SHA256

                                c8bc425f3201c25f61942597a5bd5f7ca2410a9c04811ae0180cb047d7701f43

                                SHA512

                                07c8da517ad919df750a1c1a13007583be76e8f113960e76f6c1b984b63710ea0ebf3966ce06aef19575fe0a7008bbe2bd802578f8ceb1b6b92b1cc03dd3f19a

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

                                Filesize

                                2.6MB

                                MD5

                                9c55c5482f2599282613a9677dc9010c

                                SHA1

                                441e9706756e28d2112f60e1a5fe3c0ed4368a8c

                                SHA256

                                c8bc425f3201c25f61942597a5bd5f7ca2410a9c04811ae0180cb047d7701f43

                                SHA512

                                07c8da517ad919df750a1c1a13007583be76e8f113960e76f6c1b984b63710ea0ebf3966ce06aef19575fe0a7008bbe2bd802578f8ceb1b6b92b1cc03dd3f19a

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

                                Filesize

                                2.6MB

                                MD5

                                9c55c5482f2599282613a9677dc9010c

                                SHA1

                                441e9706756e28d2112f60e1a5fe3c0ed4368a8c

                                SHA256

                                c8bc425f3201c25f61942597a5bd5f7ca2410a9c04811ae0180cb047d7701f43

                                SHA512

                                07c8da517ad919df750a1c1a13007583be76e8f113960e76f6c1b984b63710ea0ebf3966ce06aef19575fe0a7008bbe2bd802578f8ceb1b6b92b1cc03dd3f19a

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

                                Filesize

                                2.6MB

                                MD5

                                9c55c5482f2599282613a9677dc9010c

                                SHA1

                                441e9706756e28d2112f60e1a5fe3c0ed4368a8c

                                SHA256

                                c8bc425f3201c25f61942597a5bd5f7ca2410a9c04811ae0180cb047d7701f43

                                SHA512

                                07c8da517ad919df750a1c1a13007583be76e8f113960e76f6c1b984b63710ea0ebf3966ce06aef19575fe0a7008bbe2bd802578f8ceb1b6b92b1cc03dd3f19a

                              • C:\Users\Admin\Downloads\Inv No 46281.zip.crdownload

                                Filesize

                                2.2MB

                                MD5

                                1d966f996dcd93c1a98c9b3c4142c246

                                SHA1

                                4d443c9a609d3a7b7842dee42d36b939c3137a59

                                SHA256

                                9dab6775890cec31194c3c7d2e0b2e6454806d2f9e5762f501e0cd1c1da8cafa

                                SHA512

                                bb2cb6a0d95960bbc33d4c7ce8c32f71575b9e63e54bdd8831f84f8423fe0db02b9c2188b6d40155815d4bb58414eeeccd59e2304d7688ecdfc40c3dc5535f1e