Analysis

  • max time kernel
    98s
  • max time network
    97s
  • platform
    windows10-1703_x64
  • resource
    win10-20230703-en
  • resource tags

    arch:x64arch:x86image:win10-20230703-enlocale:en-usos:windows10-1703-x64system
  • submitted
    14-08-2023 03:21

General

  • Target

    http://justchapati.in/mayh

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).

  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 47 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 7 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Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://justchapati.in/mayh
    1⤵
    • 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:3076
    • 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,0xd0,0xd4,0xa8,0xd8,0x7fff90709758,0x7fff90709768,0x7fff90709778
      2⤵
        PID:2712
      • 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=1508 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:2
        2⤵
          PID:2280
        • 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=1996 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
          2⤵
            PID:2212
          • 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=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
            2⤵
              PID:4808
            • 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=2680 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:1
              2⤵
                PID:2948
              • 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=2672 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:1
                2⤵
                  PID:4696
                • 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=3968 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:1
                  2⤵
                    PID:3132
                  • 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=3928 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
                    2⤵
                      PID:312
                    • 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=5156 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
                      2⤵
                        PID:4916
                      • 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=5144 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
                        2⤵
                          PID:5080
                        • 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=5352 --field-trial-handle=1728,i,5247125442400658728,12860478173939240137,131072 /prefetch:8
                          2⤵
                            PID:3280
                        • 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:5004
                          • C:\Windows\System32\rundll32.exe
                            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                            1⤵
                              PID:348
                            • C:\Windows\system32\OpenWith.exe
                              C:\Windows\system32\OpenWith.exe -Embedding
                              1⤵
                              • Modifies registry class
                              • Suspicious use of SetWindowsHookEx
                              PID:4508
                            • C:\Users\Admin\AppData\Local\Temp\Temp1_Payment_Advice.zip\Payment_Advice.bat
                              "C:\Users\Admin\AppData\Local\Temp\Temp1_Payment_Advice.zip\Payment_Advice.bat"
                              1⤵
                              • Drops startup file
                              • Suspicious use of SetWindowsHookEx
                              PID:3136
                              • C:\Windows\SysWOW64\cmd.exe
                                cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                2⤵
                                  PID:2120
                                • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jaiugtfk.exe
                                  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jaiugtfk.exe"
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious use of SetWindowsHookEx
                                  PID:2512

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

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

                                Filesize

                                6KB

                                MD5

                                faf4cebd1bbc52e4238dc3bd37f83a73

                                SHA1

                                6b5099396fe811ba3d4cab1114255cedd1326fbd

                                SHA256

                                410196b4c5159bdd7b40129d57c323c3773e20c5e0d0c3f5d3be8eb9a6feb72a

                                SHA512

                                d3acf678fdd2d0231dea54856a040cf202d5762577b7abca8e89b67c7fca05fa2f94be87d02771591df3752098832189762d0f1cf990b80a64b215058d5288df

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

                                Filesize

                                6KB

                                MD5

                                8ac579e21e5ce3f7b05355e368acab1c

                                SHA1

                                dcf712fece42ecb281378a1aa416b686196b7e9a

                                SHA256

                                1a714795ce82234aa847370618699db22e410377c2c2a4254e8e030dddf1138d

                                SHA512

                                21d7fffae6a41999ee87df4e7563e38ce8668fedfa5e434ff4efa9f6904caa25aa38022966d0080a857c3fa08fd6716e5ca08b1b87bfbb9f40c6d9499456c6c5

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

                                Filesize

                                6KB

                                MD5

                                171d9d1d90eef155c335c1204a1d5c81

                                SHA1

                                b5f1edb90b2cc6ea4927bfc298a55d2e90259d6c

                                SHA256

                                99de76fb8da0f7951d2f2356bbfa3a271ba2fa2f16a2785453e4075735244025

                                SHA512

                                27aedd1224ddd2a65acf99ab4be86578ef7c4443663bba6852be1a88d0945a70a7434ed29c6d840425c4383d3ecc1efe1cbe00746b49a871a0eea2a159863847

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

                                Filesize

                                6KB

                                MD5

                                fb989055fdbd1c1f7c8b9e778d28c4ef

                                SHA1

                                0c942999a45d8f596dc35dc529e0f05c9fa01c1b

                                SHA256

                                08e7dd54741db100f7112cd96e64e5892518cfa26aea8d86f7b558103ef155a3

                                SHA512

                                f839430ca0fab955e32851daddf51be077657fb55d2bd7b24533f39b2d44f75116211e5fe06b413c5294d0722d920fc2610ad255ebdafa07f18ba6d8ed626ec0

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

                                Filesize

                                87KB

                                MD5

                                9fabf87e379c830ef7c78f44f680b01b

                                SHA1

                                b6f37f4791a5d7d68a10bb5189386c62fda45962

                                SHA256

                                d53f76d57021c08618f98fd5874b50651133dc92acbd87bb2a3d411685fbfd2b

                                SHA512

                                ac1f71ee53fa1ef93d796ebe54f4229f26f7efd3b6265e9b7615c898ce6949f11c2f4e4ae383e1f3102b806fd4c80995e592885ce818fc3f17835612a0f8c78f

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache

                                Filesize

                                103KB

                                MD5

                                71804e9b97e7dfc3e72df29dcc87d895

                                SHA1

                                176e7ebf4c40120068dcbb104677f9fa082bc3cf

                                SHA256

                                ddd3cf001fc45729b0c9ba45d22e43b4aa2f20e59ae951ba46abd6a4e79ff6a9

                                SHA512

                                8b8875c2438bddf1e40a83477cd5f76da28efed9599f07dbde2b434f8ae1109b008365fbfd2cad90697dbb2384cb12aae06499e02624a1e4e21e07ed44cf4421

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe57fe65.TMP

                                Filesize

                                100KB

                                MD5

                                ad226fda648006f088310d709133fe59

                                SHA1

                                7aeeb9d0e9e585a63bb66fb67a624063aeb8ef63

                                SHA256

                                e6c55259daaf579dd78ffea6c0a89461e5b767d9ea2bbd3cdb8922c009f48880

                                SHA512

                                4c3c5ecbce676e020704a423368b041f9dcc1b7d07af583c38fc6b168256a0c720fa6fbd903eb7dba058f59a31be4e3be9220db94014987448e0cbeb434569e0

                              • 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\jaiugtfk.exe

                                Filesize

                                2.9MB

                                MD5

                                85b8a9fce3d0ca6675ec426bcb6e4c6b

                                SHA1

                                fe11385ea24781211645701d30ed650b198b6763

                                SHA256

                                f273d105b0ba22b8164d3a69dc520337d2acc31067f69221bbfc0c0e60e52b74

                                SHA512

                                01b7a560480551d3a3904f098721bb44020805b392917a7cae51c5671adae6a9b23cce6389af9e90dd38f932366c535fac218676d4d1211e3965d8df4be518cc

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

                                Filesize

                                2.9MB

                                MD5

                                85b8a9fce3d0ca6675ec426bcb6e4c6b

                                SHA1

                                fe11385ea24781211645701d30ed650b198b6763

                                SHA256

                                f273d105b0ba22b8164d3a69dc520337d2acc31067f69221bbfc0c0e60e52b74

                                SHA512

                                01b7a560480551d3a3904f098721bb44020805b392917a7cae51c5671adae6a9b23cce6389af9e90dd38f932366c535fac218676d4d1211e3965d8df4be518cc

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

                                Filesize

                                2.1MB

                                MD5

                                3936402c4348e55844afa397b96311b5

                                SHA1

                                9c1bd645d98c6d2ce84241e068864a1e941a8f47

                                SHA256

                                4370670ea76150ebda8b08759a520a3dceb2900e3ccfbd57a13e9ec654aa6c36

                                SHA512

                                8eadac923f8a02757054648be3f6b6821fb69895b8dfb3ccd3ad9b564dd38fa260003395486f53da3329b8b338dec4dced589238be3fb1be0b7e5bbc01ff4c6a