Analysis

  • max time kernel
    35s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16-06-2023 02:43

General

  • Target

    http://opal-advisory.com/407.htm

Malware Config

Extracted

Family

kutaki

C2

http://linkwotowoto.club/new/two.php

Signatures

  • Kutaki

    Information stealer and keylogger that hides inside legitimate Visual Basic applications.

  • Kutaki Executable 4 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

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    "C:\Program Files\Google\Chrome\Application\chrome.exe" "--simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT'" http://opal-advisory.com/407.htm
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1712
    • 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=0xc0,0xc4,0xc8,0x94,0xcc,0x7fefb819758,0x7fefb819768,0x7fefb819778
      2⤵
        PID:1688
      • 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=1228 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:2
        2⤵
          PID:1616
        • 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=1508 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /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=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1496 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:8
            2⤵
              PID:1844
            • 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=2196 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:1
              2⤵
                PID:2008
              • 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=2208 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:1
                2⤵
                  PID:1000
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1340 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:2
                  2⤵
                    PID:2056
                  • 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=1612 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:1
                    2⤵
                      PID:2132
                    • 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=4024 --field-trial-handle=1260,i,13923834759985271550,14845586758305005246,131072 /prefetch:8
                      2⤵
                        PID:2268
                    • 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\AUDIODG.EXE
                        C:\Windows\system32\AUDIODG.EXE 0x514
                        1⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:2464
                      • C:\Users\Admin\AppData\Local\Temp\Temp1_Tax Payment Receipt.zip\Tax Payment Receipt.exe
                        "C:\Users\Admin\AppData\Local\Temp\Temp1_Tax Payment Receipt.zip\Tax Payment Receipt.exe"
                        1⤵
                        • Suspicious use of SetWindowsHookEx
                        PID:2588
                        • C:\Windows\SysWOW64\cmd.exe
                          cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapimage.bmp
                          2⤵
                            PID:2632
                          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wenmkgfk.exe
                            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wenmkgfk.exe"
                            2⤵
                              PID:2664
                          • C:\Windows\SysWOW64\DllHost.exe
                            C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
                            1⤵
                              PID:2860

                            Network

                            MITRE ATT&CK Enterprise v6

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

                              Filesize

                              264KB

                              MD5

                              f50f89a0a91564d0b8a211f8921aa7de

                              SHA1

                              112403a17dd69d5b9018b8cede023cb3b54eab7d

                              SHA256

                              b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                              SHA512

                              bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                              Filesize

                              4KB

                              MD5

                              1a52e8722fe1a22c7377fa88dd368a1d

                              SHA1

                              945046922435d4d258b6d3ffbbdd4997de80491a

                              SHA256

                              c97b725320852985bdb8ac9a9c1cfb46e8839a3e86dd16683a0fcacddd640efe

                              SHA512

                              9bbd3fce74253d36a9cf3c6de94579e50a6a7471aea0ea06e001869dc94aedb85d13d1de620258a0c76cdd669e680df8219ed40db22eefa46f3bb4168270d01a

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

                              Filesize

                              4KB

                              MD5

                              0f42a68ccad8ef6ecc16e069719b739d

                              SHA1

                              780762af2247b10d26624136edabea3782f87e44

                              SHA256

                              4e1a3dd8d1800b4cb09e7e96635e03aa15c1144acaa750b46c77a5c52e1379f7

                              SHA512

                              0b835282e00bdae8284f86a2ea8198c4cbc799bebafffe065b6ba20139860d8c0e17b25691cdd2279868ccead3eb076b2b2967d9d5298db8abd6b029d56836b2

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000004.dbtmp

                              Filesize

                              16B

                              MD5

                              6752a1d65b201c13b62ea44016eb221f

                              SHA1

                              58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                              SHA256

                              0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                              SHA512

                              9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

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

                              Filesize

                              641KB

                              MD5

                              0b769e0757ebbcb320f3969b039cdbf2

                              SHA1

                              d0e44fe2090c304d75cfaedc84278bb887bd6e69

                              SHA256

                              612c1442c0fe05cba647aafaad062e03dd3064b5f9f506fe5bf130487249633c

                              SHA512

                              b3711d21273c89fdfb92e78d841fe087c2ec8845f51f804fbbf6ad908b658706046452d9de7dc8cc78b5b3624fc484fa2855ae5a8863e6a8531a26ff5e657fde

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

                              Filesize

                              641KB

                              MD5

                              0b769e0757ebbcb320f3969b039cdbf2

                              SHA1

                              d0e44fe2090c304d75cfaedc84278bb887bd6e69

                              SHA256

                              612c1442c0fe05cba647aafaad062e03dd3064b5f9f506fe5bf130487249633c

                              SHA512

                              b3711d21273c89fdfb92e78d841fe087c2ec8845f51f804fbbf6ad908b658706046452d9de7dc8cc78b5b3624fc484fa2855ae5a8863e6a8531a26ff5e657fde

                            • C:\Users\Admin\Downloads\Tax Payment Receipt.zip

                              Filesize

                              435KB

                              MD5

                              5ece1785dde8c3fc41573f0108cc866a

                              SHA1

                              c8ecf3eb089a1c5bff5dd1f3acd30b73d932b950

                              SHA256

                              f474e940c440282a407c16beabb4ee6434edc1636f2209f8590b1e82a2c564c9

                              SHA512

                              92442b600198b1a677413b690d70dbc07ceba9be2c80a341f43d1945aa7cb680e61ed2cfd2e0827c96fd137802910a2f49dee6758b1f5d7b5acad9cc5a5979d7

                            • \??\pipe\crashpad_1712_LXEZBFEZHWHNUBIT

                              MD5

                              d41d8cd98f00b204e9800998ecf8427e

                              SHA1

                              da39a3ee5e6b4b0d3255bfef95601890afd80709

                              SHA256

                              e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                              SHA512

                              cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                            • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wenmkgfk.exe

                              Filesize

                              641KB

                              MD5

                              0b769e0757ebbcb320f3969b039cdbf2

                              SHA1

                              d0e44fe2090c304d75cfaedc84278bb887bd6e69

                              SHA256

                              612c1442c0fe05cba647aafaad062e03dd3064b5f9f506fe5bf130487249633c

                              SHA512

                              b3711d21273c89fdfb92e78d841fe087c2ec8845f51f804fbbf6ad908b658706046452d9de7dc8cc78b5b3624fc484fa2855ae5a8863e6a8531a26ff5e657fde

                            • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wenmkgfk.exe

                              Filesize

                              641KB

                              MD5

                              0b769e0757ebbcb320f3969b039cdbf2

                              SHA1

                              d0e44fe2090c304d75cfaedc84278bb887bd6e69

                              SHA256

                              612c1442c0fe05cba647aafaad062e03dd3064b5f9f506fe5bf130487249633c

                              SHA512

                              b3711d21273c89fdfb92e78d841fe087c2ec8845f51f804fbbf6ad908b658706046452d9de7dc8cc78b5b3624fc484fa2855ae5a8863e6a8531a26ff5e657fde

                            • memory/2632-191-0x0000000000440000-0x0000000000442000-memory.dmp

                              Filesize

                              8KB

                            • memory/2860-192-0x0000000000140000-0x0000000000142000-memory.dmp

                              Filesize

                              8KB

                            • memory/2860-193-0x0000000000360000-0x0000000000361000-memory.dmp

                              Filesize

                              4KB