Analysis

  • max time kernel
    599s
  • max time network
    487s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-05-2024 22:10

General

  • Target

    http://alphahooklabs.com/ndhjl

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 6 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 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 18 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Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument http://alphahooklabs.com/ndhjl
    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:736
    • 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=110.0.5481.104 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ff8f564ab58,0x7ff8f564ab68,0x7ff8f564ab78
      2⤵
        PID:3240
      • 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=1804 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:2
        2⤵
          PID:4908
        • 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=2160 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
          2⤵
            PID:1380
          • 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=service --mojo-platform-channel-handle=2220 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
            2⤵
              PID:2456
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --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=2916 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:1
              2⤵
                PID:4460
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2948 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:1
                2⤵
                  PID:3184
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4300 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:1
                  2⤵
                    PID:2428
                  • 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=4896 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
                    2⤵
                      PID:4508
                    • 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=4848 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
                      2⤵
                        PID:3332
                      • 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=5052 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
                        2⤵
                          PID:1796
                        • 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=4164 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:8
                          2⤵
                            PID:1956
                          • 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=736 --field-trial-handle=1732,i,16822213413553358196,4620888955456363290,131072 /prefetch:2
                            2⤵
                            • Suspicious behavior: EnumeratesProcesses
                            PID:4556
                        • C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"
                          1⤵
                            PID:3080
                          • C:\Windows\System32\rundll32.exe
                            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                            1⤵
                              PID:4904
                            • C:\Program Files\7-Zip\7zG.exe
                              "C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\Downloads\Invoice No 34710\" -ad -an -ai#7zMap29992:96:7zEvent4442
                              1⤵
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of FindShellTrayWindow
                              PID:2408
                            • C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat
                              "C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat"
                              1⤵
                              • Drops startup file
                              • Suspicious use of SetWindowsHookEx
                              PID:3116
                              • C:\Windows\SysWOW64\cmd.exe
                                cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                2⤵
                                  PID:3684
                                • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe
                                  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe"
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious use of SetWindowsHookEx
                                  PID:3644
                              • C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat
                                "C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat"
                                1⤵
                                • Drops startup file
                                • Suspicious use of SetWindowsHookEx
                                PID:4352
                                • C:\Windows\SysWOW64\cmd.exe
                                  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                  2⤵
                                    PID:4068
                                  • C:\Windows\SysWOW64\taskkill.exe
                                    taskkill /im bxzrvvfk.exe /f
                                    2⤵
                                    • Kills process with taskkill
                                    PID:1160
                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe
                                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe"
                                    2⤵
                                    • Executes dropped EXE
                                    • Suspicious use of SetWindowsHookEx
                                    PID:1188
                                • C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat
                                  "C:\Users\Admin\AppData\Local\Temp\Temp1_Invoice No 34710.zip\Invoice No 34710.bat"
                                  1⤵
                                  • Drops startup file
                                  • Suspicious use of SetWindowsHookEx
                                  PID:4300
                                  • C:\Windows\SysWOW64\cmd.exe
                                    cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                    2⤵
                                      PID:2308
                                    • C:\Windows\SysWOW64\taskkill.exe
                                      taskkill /im bxzrvvfk.exe /f
                                      2⤵
                                      • Kills process with taskkill
                                      PID:2100
                                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe
                                      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bxzrvvfk.exe"
                                      2⤵
                                      • Executes dropped EXE
                                      • Suspicious use of SetWindowsHookEx
                                      PID:2696

                                  Network

                                  MITRE ATT&CK Matrix ATT&CK v13

                                  Discovery

                                  System Information Discovery

                                  2
                                  T1082

                                  Query Registry

                                  1
                                  T1012

                                  Replay Monitor

                                  Loading Replay Monitor...

                                  Downloads

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

                                    1KB

                                    MD5

                                    e0158b40c621a3914f8c2dcad95e3efe

                                    SHA1

                                    5e57285a0a717f4578f109cb71d57a9e928b2f1c

                                    SHA256

                                    4d526c3de6906d6fcfba9609b587651e7f99bab27ade61a633c18b5d362f7b75

                                    SHA512

                                    2c58674e8279f9112c740f975d4666009406be063d90c1811d134d7f88d0a7ffd7a4f22476ca3c00679121a8d4d7dc044acb6f5a1dbaf8a999664c62696760bb

                                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports
                                    Filesize

                                    2B

                                    MD5

                                    d751713988987e9331980363e24189ce

                                    SHA1

                                    97d170e1550eee4afc0af065b78cda302a97674c

                                    SHA256

                                    4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                                    SHA512

                                    b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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

                                    690B

                                    MD5

                                    22e1521ba9083220b8a33a9bf83a58a9

                                    SHA1

                                    eb246df23422139a29258355868e1e6f03cfc9b7

                                    SHA256

                                    de12c7da240e3e0669ff49d46076e922bc95848b1dda1cf3634c0b2a97f49f7e

                                    SHA512

                                    940a1ce04846bc71b5810beac8453cc44f101e972022cd51843de004b0b41cadd160a4a15e37aa792ee889f0eea1aacb5c233e49869a50f031531622cc9034c1

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

                                    7KB

                                    MD5

                                    0256f51f6f9ac337f765620f67c59aed

                                    SHA1

                                    d5f7c043723d80a3bae7f28755f5bce2fb42833a

                                    SHA256

                                    c53e2e86aa333f6939c4a7b3fb21d8a95a769a6e257fdf9046af8f9a8949f8ed

                                    SHA512

                                    fb4ec5f605c9c68f2731269c7ccc5e059766df027073b9abbe84f738edea64116a60d2be1f4f041a6f85269aa396025d98d0b5c0ed03df1235cc85652feb88c3

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

                                    130KB

                                    MD5

                                    18f62a380c692a5ee89563225dc83aed

                                    SHA1

                                    8060b7323ba29c9bf7bd90becd1f08f4d300b552

                                    SHA256

                                    ba7cb0dcb7810bc2718bfa77b51d92f046953e7e973b9e5ab3f4de1af25c4c70

                                    SHA512

                                    b44e0a2bc0c26a225c5eb1cec01e6ddf82b4a450b225260e7469339c6cf68fbb954f6d65a19e3484bb2b628d6599d726a1769b196b6646d9267055eb47454320

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

                                    98KB

                                    MD5

                                    b552e7a57fa2340bebf063024026fe87

                                    SHA1

                                    4bb05217fe9f0b39949b099a6a7f123b749f840b

                                    SHA256

                                    3253be9f4b3bb00304185cd21ab880951f2fbc194dadaab77dafe16cf4218a91

                                    SHA512

                                    59c65c8e86663602bcdd94a94d4667ee7670767cae86ad64b3cf51a43c768b367475bb47a01fac65017eb6f2ba867faf8548a9bb625bd05f7488e8257ed1079b

                                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe579c30.TMP
                                    Filesize

                                    94KB

                                    MD5

                                    ec9586d8aa307673a09e34164698b43d

                                    SHA1

                                    857eee8117da9c0bc3411cf957237bb0ff3a0c02

                                    SHA256

                                    23a938dbcbfe1bf2872e5d9f17f36f5598f11bfbc2361408af4d9d496693f062

                                    SHA512

                                    4cc61fbb7fd3a0b04103c4b489f631340df086b276f81383a7f8297ed43aecbae762eee9a659b6ebc5a3fd1e50a7c781ea9123cb63564c03f0c6733bb279ede6

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

                                    1.5MB

                                    MD5

                                    79ba8864b6d074a08b9d89094586e053

                                    SHA1

                                    5e479cba25467257ac33c6c8a96e1a603ce08dd8

                                    SHA256

                                    e0bc9c7429bae21b038607fab90eb38e50f64b253f3f69d227ac0e207795d366

                                    SHA512

                                    0e5a462f4770b4852c61d32390103992bfa9b09bc07b21316e8a080f5e4ab364b9946c1eeb53d8d2e362304cb295dffaf5eb3a7a1b88a6db7e9537789111247f

                                  • C:\Users\Admin\Downloads\Invoice No 34710.zipx.crdownload
                                    Filesize

                                    1.3MB

                                    MD5

                                    c7665862f467465bd8143d5213e53678

                                    SHA1

                                    167898b91a056a7114c99e4ca68824206eb35912

                                    SHA256

                                    9d912b7f175c4bbe72c8b1c801d121b7fda116f8902eb5b3bf4d62aa43885345

                                    SHA512

                                    2b5d19c8a0897a8a9ba529177fe91961f9948e2c299716484e0ec58767ce3802740752168c0cbb7eb00c842a5c7907454accd195c7a366e6f0fffdd25e75ff99

                                  • \??\pipe\crashpad_736_EKHJOVVZJQPLQEEX
                                    MD5

                                    d41d8cd98f00b204e9800998ecf8427e

                                    SHA1

                                    da39a3ee5e6b4b0d3255bfef95601890afd80709

                                    SHA256

                                    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                    SHA512

                                    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e