Analysis

  • max time kernel
    520s
  • max time network
    494s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-05-2023 14:02

General

  • Target

    https://rb.gy/v3vg5

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 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
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 37 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    "C:\Program Files\Google\Chrome\Application\chrome.exe" "--simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT'" https://rb.gy/v3vg5
    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:3280
    • 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,0x100,0x104,0xd8,0x108,0x7ffb46e39758,0x7ffb46e39768,0x7ffb46e39778
      2⤵
        PID:1644
      • 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=1772 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:2
        2⤵
          PID:4820
        • 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=2168 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
          2⤵
            PID:3852
          • 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=2228 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
            2⤵
              PID:3664
            • 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=2 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=3176 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /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=2 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3184 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:1
                2⤵
                  PID:724
                • 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 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4592 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:1
                  2⤵
                    PID:4324
                  • 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 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=4876 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:1
                    2⤵
                      PID:552
                    • 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=3364 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
                      2⤵
                        PID:5076
                      • 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=5344 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
                        2⤵
                          PID:3680
                        • 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=5420 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
                          2⤵
                            PID:3192
                          • 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=5140 --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=1664 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:2
                            2⤵
                            • Suspicious behavior: EnumeratesProcesses
                            PID:3948
                          • 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=4688 --field-trial-handle=1808,i,64164769888754509,17287311949769791936,131072 /prefetch:8
                            2⤵
                              PID:4208
                          • 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:2464
                            • C:\Windows\System32\rundll32.exe
                              C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                              1⤵
                                PID:2620
                              • C:\Program Files\7-Zip\7zG.exe
                                "C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\Downloads\Payment_Debit\" -ad -an -ai#7zMap4693:88:7zEvent30231
                                1⤵
                                • Suspicious use of FindShellTrayWindow
                                PID:4684
                              • C:\Users\Admin\Downloads\Payment_Debit\Payment_Debit.cmd
                                "C:\Users\Admin\Downloads\Payment_Debit\Payment_Debit.cmd"
                                1⤵
                                • Drops startup file
                                • Executes dropped EXE
                                • Suspicious use of SetWindowsHookEx
                                PID:4072
                                • C:\Windows\SysWOW64\cmd.exe
                                  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
                                  2⤵
                                    PID:1456
                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wennfsfk.exe
                                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wennfsfk.exe"
                                    2⤵
                                    • Executes dropped EXE
                                    • Suspicious use of SetWindowsHookEx
                                    PID:548

                                Network

                                MITRE ATT&CK Enterprise v6

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

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

                                  Filesize

                                  1KB

                                  MD5

                                  9f72b413a0cb420283e0adfe15307b25

                                  SHA1

                                  f2a9e9c205c2ae3b0cbf674d7e6df272f5ceed97

                                  SHA256

                                  f571ec18594d8610f2dfef08fa482677ade2e81ac5bb7b404cf251cd3af552da

                                  SHA512

                                  5d4829f3cb4f2c0f7a020e9639586c0a45a90e6fbc58881e7e6104e0702e3904886b99c690c560b705d3b8b6fe7bc3d74092aa9526bde904f4f7a32c6b66ee0c

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

                                  Filesize

                                  873B

                                  MD5

                                  9ef763f684931c8313dcd5a5c5b2abe6

                                  SHA1

                                  1f59049f122e69d0d65b41a2a6be9de879ed88cd

                                  SHA256

                                  dab489f241c81e2de45fbe3ea3792e4251056ea42d1e90bafc443cb47c1585c9

                                  SHA512

                                  5a237a510093c7d259e3368c478b7d17143b9e47e1e91efe34542db9b45e3f174326fb80bbb2f50e6dca66bef8b3466cc6578623457944907ed3ca6e4ffb0878

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

                                  Filesize

                                  6KB

                                  MD5

                                  85ed481a80b91fef1d0ffcc0b541123f

                                  SHA1

                                  03662707fd9d6d98dabc01fbafe4584b9ba4924f

                                  SHA256

                                  e1d89bd715582670e126eeb0cda49d5f8dc614f98b7c6fb9a05f042203d40578

                                  SHA512

                                  1e7ce1a2ade8310fefe1a1e8ce27eedcac568d5e57dd5cfd21878a1567a1d5fd59056af329eca6a709b94276c157d9ed2212007506fc4a03ca1b88be82490147

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

                                  Filesize

                                  5KB

                                  MD5

                                  bcfd959517589e4e87004f44334ed80d

                                  SHA1

                                  577fa162dcd8c9d05cf86addac021e0153ffe2b5

                                  SHA256

                                  40779597795be72844cb98809f77e36835d780918e08e13957246376e7de50c2

                                  SHA512

                                  fee9b49a32b418ba85f82151f062379805e3f0068bfd9dfb6fbbb3856103ba2c85cfd99bc2f1ccd8a16d24a7aa356a2d19b7482e49665096af92f80f832a7559

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

                                  Filesize

                                  5KB

                                  MD5

                                  9bac9c410d47d2f5d5796e1752df4783

                                  SHA1

                                  ae50cf1ead8c331cfcdbe28d7e1031f5b989b0b7

                                  SHA256

                                  0ff00710efee9ee2e15d70db5b0f1eb212bc5e6a93a88fb4145011a871db89b6

                                  SHA512

                                  2fed47ab3ec14daff16542d741c7582651b8cecd8b18579b5fc8b84c4810cf9196ad6cf47e6bf84d980998de5cc691ab64a000981078bbe0303774917e9217e1

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

                                  Filesize

                                  110KB

                                  MD5

                                  6d83613e1d99bc075f328b2373a5c719

                                  SHA1

                                  87fe6141d1f68d6adaf2cdda7543fbe981cf79f8

                                  SHA256

                                  0af34522850b25a482966599cd92bec46eb4ae4962e6d7eb311dfcf4261b2b8f

                                  SHA512

                                  3d88d4e4ead44db2ce8d2f465546f6d32d8e049a545df8e07f9f29baa9b2271b320679b2d2413eff3695d04df173e8ddf13b479e310fa1da8364a53759f7efe1

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Module Info Cache~RFe59afce.TMP

                                  Filesize

                                  106KB

                                  MD5

                                  93ae2ba1d2d5a6e85d114adf6afef106

                                  SHA1

                                  21dc9d55f5eac0402623ae37b7afe4c591b442ca

                                  SHA256

                                  ce2b6cf188b8cf2f6a5a8b483635f0e384be35816b7440d5b8ca359c43c8e6a3

                                  SHA512

                                  e47fe515cd8374edd9deca2cbc7958ab1ecee352744806722c639431adad23eeb86f76529f5cd67111c1e174b75aa434b5dfb2fc00d23812874edfeb79fe2eb9

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\cdb70b04-3004-4008-a2aa-e7ba15ecbcdf.tmp

                                  Filesize

                                  153KB

                                  MD5

                                  489f6b0e6a8eedd40a7a6839835c5f0b

                                  SHA1

                                  c825917ffde608c045cb48cc14b871f14e693953

                                  SHA256

                                  18eea240d628c75575b8d3ba59c19c5da3eeab04a82c2c5bab2ddc7ce6c8ba82

                                  SHA512

                                  8a6d3be71fcdd70f3b84f444fcac5e985344597433b1c81900e2382d4f9d514828ba789fa33a662f8e2dad25658e8076662ccba8cf76be75e269f5b73abf6456

                                • 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\wennfsfk.exe

                                  Filesize

                                  2.4MB

                                  MD5

                                  ebec9c7d7ccd8a21125bbf8709fadb40

                                  SHA1

                                  d7759ef600a94c59ef0f7802bea90949041055dd

                                  SHA256

                                  2daaa422a6cc23cf90849e86af30d8bc9252704159a94e2fdd5fc28665f58b54

                                  SHA512

                                  a4cc92873f82390508d8c95a4bb9779fd3212709cc7a7aeb2f1c844de8ce802bec3b7df5be42d5d7ac7bf6a58ca592fd9bc7fe845bc80771adae2c801be2edb4

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

                                  Filesize

                                  2.4MB

                                  MD5

                                  ebec9c7d7ccd8a21125bbf8709fadb40

                                  SHA1

                                  d7759ef600a94c59ef0f7802bea90949041055dd

                                  SHA256

                                  2daaa422a6cc23cf90849e86af30d8bc9252704159a94e2fdd5fc28665f58b54

                                  SHA512

                                  a4cc92873f82390508d8c95a4bb9779fd3212709cc7a7aeb2f1c844de8ce802bec3b7df5be42d5d7ac7bf6a58ca592fd9bc7fe845bc80771adae2c801be2edb4

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

                                  Filesize

                                  2.4MB

                                  MD5

                                  ebec9c7d7ccd8a21125bbf8709fadb40

                                  SHA1

                                  d7759ef600a94c59ef0f7802bea90949041055dd

                                  SHA256

                                  2daaa422a6cc23cf90849e86af30d8bc9252704159a94e2fdd5fc28665f58b54

                                  SHA512

                                  a4cc92873f82390508d8c95a4bb9779fd3212709cc7a7aeb2f1c844de8ce802bec3b7df5be42d5d7ac7bf6a58ca592fd9bc7fe845bc80771adae2c801be2edb4

                                • C:\Users\Admin\Downloads\Payment_Debit.zip

                                  Filesize

                                  2.1MB

                                  MD5

                                  6b28c8f8c770282855639857b2a446ac

                                  SHA1

                                  9c7a967e94874909d2c90b7f239a391aa7cef047

                                  SHA256

                                  859c654e0746df397e87d5794f33fce8fd7b716b52eb4611bc0c18360e658d23

                                  SHA512

                                  766df651fd521c4745228b1daa8cb98ad9420bdb1161ad41021bcd0b11dda666d5a824761d6aff396caf7c30f3c3a36052ee3fb9bae62901ed3f8ef58340f32a

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

                                  Filesize

                                  2.1MB

                                  MD5

                                  6b28c8f8c770282855639857b2a446ac

                                  SHA1

                                  9c7a967e94874909d2c90b7f239a391aa7cef047

                                  SHA256

                                  859c654e0746df397e87d5794f33fce8fd7b716b52eb4611bc0c18360e658d23

                                  SHA512

                                  766df651fd521c4745228b1daa8cb98ad9420bdb1161ad41021bcd0b11dda666d5a824761d6aff396caf7c30f3c3a36052ee3fb9bae62901ed3f8ef58340f32a

                                • C:\Users\Admin\Downloads\Payment_Debit\Payment_Debit.cmd

                                  Filesize

                                  2.4MB

                                  MD5

                                  ebec9c7d7ccd8a21125bbf8709fadb40

                                  SHA1

                                  d7759ef600a94c59ef0f7802bea90949041055dd

                                  SHA256

                                  2daaa422a6cc23cf90849e86af30d8bc9252704159a94e2fdd5fc28665f58b54

                                  SHA512

                                  a4cc92873f82390508d8c95a4bb9779fd3212709cc7a7aeb2f1c844de8ce802bec3b7df5be42d5d7ac7bf6a58ca592fd9bc7fe845bc80771adae2c801be2edb4

                                • C:\Users\Admin\Downloads\Payment_Debit\Payment_Debit.cmd

                                  Filesize

                                  2.4MB

                                  MD5

                                  ebec9c7d7ccd8a21125bbf8709fadb40

                                  SHA1

                                  d7759ef600a94c59ef0f7802bea90949041055dd

                                  SHA256

                                  2daaa422a6cc23cf90849e86af30d8bc9252704159a94e2fdd5fc28665f58b54

                                  SHA512

                                  a4cc92873f82390508d8c95a4bb9779fd3212709cc7a7aeb2f1c844de8ce802bec3b7df5be42d5d7ac7bf6a58ca592fd9bc7fe845bc80771adae2c801be2edb4

                                • \??\pipe\crashpad_3280_HXBODSNERXHXSSBM

                                  MD5

                                  d41d8cd98f00b204e9800998ecf8427e

                                  SHA1

                                  da39a3ee5e6b4b0d3255bfef95601890afd80709

                                  SHA256

                                  e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                  SHA512

                                  cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e