Analysis

  • max time kernel
    223s
  • max time network
    204s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-08-2023 02:21

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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 42 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Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://justchapati.in/mayh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:5068
    • 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,0x100,0x104,0xd8,0x108,0x7ffe40c59758,0x7ffe40c59768,0x7ffe40c59778
      2⤵
        PID:2960
      • 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=1640 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:2
        2⤵
          PID:1296
        • 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=2172 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
          2⤵
            PID:3916
          • 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=2260 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
            2⤵
              PID:2368
            • 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=3000 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:1
              2⤵
                PID:3936
              • 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=2980 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:1
                2⤵
                  PID:4464
                • 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=4596 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:1
                  2⤵
                    PID:4284
                  • 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=5208 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
                    2⤵
                      PID:4132
                    • 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=5436 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
                      2⤵
                        PID:1652
                      • 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=5304 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
                        2⤵
                          PID:3472
                        • 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=3752 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
                          2⤵
                            PID:4548
                          • 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=3720 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:8
                            2⤵
                              PID:4408
                            • 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=2596 --field-trial-handle=1888,i,14435939379317539261,3475115656431994871,131072 /prefetch:2
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:3252
                          • 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:1388
                            • C:\Windows\System32\rundll32.exe
                              C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                              1⤵
                                PID:3300
                              • 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:4528
                                • C:\Windows\SysWOW64\cmd.exe
                                  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                  2⤵
                                    PID:720
                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yglalpfk.exe
                                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yglalpfk.exe"
                                    2⤵
                                    • Executes dropped EXE
                                    • Suspicious use of SetWindowsHookEx
                                    PID:2016

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\359c135a-eed7-4f29-8ec4-b3c63f57357d.tmp

                                  Filesize

                                  89KB

                                  MD5

                                  93fa194ca414f08246d2b60e24a8b221

                                  SHA1

                                  2f48a33b4d6400a7b6be31a147c2e9f8da84e906

                                  SHA256

                                  2a766ebc0d02d485b949b8c2ad3b09835c74d8051490f7cac0bef9a19348ba01

                                  SHA512

                                  ccda50da8334147b9f2f8596e9af874ea63625bbecc0c0fa8f70ce2ae92ab6db58e4bac119ff2591ac0796450f89678f1c6d6a249c0622c5ab907501f5128274

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

                                  Filesize

                                  824B

                                  MD5

                                  b7853a6098055f8b43856a46ac71b324

                                  SHA1

                                  b680a802861d04052a8033e8c5f215ba8c6d02ae

                                  SHA256

                                  0afa57be22f200328cb325f0316868357f7c5e187dc014680af3d585f84d16ed

                                  SHA512

                                  81b7e28cead577d002690b6e630b0bf33c622264c49c35d15d1622da50dcd9dacb93887cd3b1a23d61c72bf91d3a75e4cbb2543011a65cf765dc9a3b5e4daa06

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

                                  Filesize

                                  6KB

                                  MD5

                                  ef15103763e2a507040515cad1ccd76a

                                  SHA1

                                  6212c2ca39c3a5b7923915206a5777f80a56fbb7

                                  SHA256

                                  f426724ab6d89ecdf22191106b82025c3dd889b4331dded3bf802bc551c88eaa

                                  SHA512

                                  a018d319e22da4c0b81c16d33d765b36515b9fa1629280d22eec956891cdeeabb8085c567548a7b6c8a6bf6153bfa9c9dd33c984466dcc8914a3ad056d978cc4

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

                                  Filesize

                                  89KB

                                  MD5

                                  8dde3f21379522edad16df84a1189965

                                  SHA1

                                  c5b2c32355b73f7c96f5b6082ea2cbcad52a5215

                                  SHA256

                                  5468ec800007e6ba403525f4c8030e0aa2cad80e6dd8b30ab5d7b37e332e3612

                                  SHA512

                                  3d130ebed92af59f018fb721a11c2bc4ba71dcf9df07d2e1d96d2d369cf6be74b4880680fcc77e28e39325cb1c9dd757dbcc11ec21a1bb2ee6d376d805cd4f26

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

                                  Filesize

                                  108KB

                                  MD5

                                  e7ec824551131712b37c46669f94ae0a

                                  SHA1

                                  f25893820d722514cf8f33e7377fba5c904625c8

                                  SHA256

                                  a4962a8ee069aadfad70760ca935453a4813f6c5e23ae49a7ef924cd4d71f8f1

                                  SHA512

                                  de45c696d5137ec6760953c4f9d7874fecf71b2ba76fafb979c5498dc1d2feff0e4cc80df0738113a201fc807cae53aced7c82bbb6a076e154ff151eda993c61

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

                                  Filesize

                                  89KB

                                  MD5

                                  31d0e5f3f537f820cf09bf44b93480f7

                                  SHA1

                                  debdb797d24d6c4ae0a4a3fdc018eb17c5f0560c

                                  SHA256

                                  0c1f3a1ff7b0a31c60fe7f0bf36e7c4bfb06a4964b0fb3578b0325be510f5e3e

                                  SHA512

                                  e73688b371e3c301eb65a6c2af2b8a15ba126b7b716ee108967f6b1fe40f88322097f67c764b8b178991ecdb21504c42b483a6e6aecedd6969463e30b9caa6c9

                                • 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\yglalpfk.exe

                                  Filesize

                                  2.9MB

                                  MD5

                                  85b8a9fce3d0ca6675ec426bcb6e4c6b

                                  SHA1

                                  fe11385ea24781211645701d30ed650b198b6763

                                  SHA256

                                  f273d105b0ba22b8164d3a69dc520337d2acc31067f69221bbfc0c0e60e52b74

                                  SHA512

                                  01b7a560480551d3a3904f098721bb44020805b392917a7cae51c5671adae6a9b23cce6389af9e90dd38f932366c535fac218676d4d1211e3965d8df4be518cc

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

                                • \??\pipe\crashpad_5068_GBWGEMBWWMTWXPRC

                                  MD5

                                  d41d8cd98f00b204e9800998ecf8427e

                                  SHA1

                                  da39a3ee5e6b4b0d3255bfef95601890afd80709

                                  SHA256

                                  e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                  SHA512

                                  cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e