Analysis

  • max time kernel
    167s
  • max time network
    199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-02-2024 19:02

General

  • Target

    TikToKBuilder.exe

  • Size

    168.6MB

  • MD5

    c7c4ace6b0b14a749e4bce6ae94e45dc

  • SHA1

    5c02505f7ea90448c43b831e2eee34fcacefef95

  • SHA256

    06a1954a32e5a6823454c8b70a43dafcc44c9dec5c31f9d72a0774f0326dadcf

  • SHA512

    05e405eeea47b7ad513a3098aacf3b2cb3a0fbc7734630255023de601536305b9f7e98ec1ab780eba7110d6f3b7573186d2f1180617d2564a13f04382e66b025

  • SSDEEP

    1572864:KXic4qb6IXgDaJfpEQHgelkLK4z34xGWw0TwW1T/qWhehZvmCtS3JPfyzG49FndX:UVKvWZ8tyx4u

Score
10/10

Malware Config

Signatures

  • Epsilon Stealer

    Information stealer.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe
    "C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3156
    • C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe
      "C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe" --type=gpu-process --user-data-dir="C:\Users\Admin\AppData\Roaming\TikToKBuilder" --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=1872 --field-trial-handle=1884,i,15948998548025514825,4396620363561728880,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:2
      2⤵
        PID:4556
      • C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe
        "C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --user-data-dir="C:\Users\Admin\AppData\Roaming\TikToKBuilder" --mojo-platform-channel-handle=2308 --field-trial-handle=1884,i,15948998548025514825,4396620363561728880,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
        2⤵
          PID:1104
        • C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe
          "C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe" --type=renderer --user-data-dir="C:\Users\Admin\AppData\Roaming\TikToKBuilder" --app-path="C:\Users\Admin\AppData\Local\Temp\resources\app.asar" --enable-sandbox --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=4 --mojo-platform-channel-handle=2620 --field-trial-handle=1884,i,15948998548025514825,4396620363561728880,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:1
          2⤵
          • Checks computer location settings
          PID:960
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /d /s /c "C:\Windows\system32\reg.exe QUERY "HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Sessions""
          2⤵
            PID:568
            • C:\Windows\system32\reg.exe
              C:\Windows\system32\reg.exe QUERY "HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Sessions"
              3⤵
                PID:1948
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /d /s /c "wmic /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get displayName /Format:List"
              2⤵
                PID:4856
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get displayName /Format:List
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2428
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /d /s /c "C:\Windows\system32\reg.exe QUERY "HKCU\Software\Valve\Steam" /v SteamPath"
                2⤵
                  PID:1040
                  • C:\Windows\system32\reg.exe
                    C:\Windows\system32\reg.exe QUERY "HKCU\Software\Valve\Steam" /v SteamPath
                    3⤵
                      PID:2820
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /d /s /c "wmic path win32_VideoController get name"
                    2⤵
                      PID:4264
                      • C:\Windows\System32\Wbem\WMIC.exe
                        wmic path win32_VideoController get name
                        3⤵
                        • Detects videocard installed
                        PID:3680
                    • C:\Windows\system32\cmd.exe
                      C:\Windows\system32\cmd.exe /d /s /c "cmd /c chcp 65001>nul && netsh wlan show profiles"
                      2⤵
                        PID:1864
                        • C:\Windows\system32\cmd.exe
                          cmd /c chcp 65001
                          3⤵
                            PID:2844
                            • C:\Windows\system32\chcp.com
                              chcp 65001
                              4⤵
                                PID:4876
                            • C:\Windows\system32\netsh.exe
                              netsh wlan show profiles
                              3⤵
                                PID:4536
                            • C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.exe
                              "C:\Users\Admin\AppData\Local\Temp\TikToKBuilder.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 --user-data-dir="C:\Users\Admin\AppData\Roaming\TikToKBuilder" --gpu-preferences=WAAAAAAAAADoAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAACEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=2504 --field-trial-handle=1884,i,15948998548025514825,4396620363561728880,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
                              2⤵
                              • Drops file in System32 directory
                              • Suspicious behavior: EnumeratesProcesses
                              PID:3084

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • C:\Users\Admin\AppData\Local\Temp\1f62c189-24ae-4524-bc13-ee055f1679d4.tmp.node

                            Filesize

                            1.6MB

                            MD5

                            bc3285978427f0121ff25a2bc45a9c04

                            SHA1

                            8e33c8673c2d55697dbaeb5eec0419bece8967a1

                            SHA256

                            0135692978c34ca3ff4ecc40f71516df66ad54bb3acf38dc144f87af15fc8744

                            SHA512

                            ac9e46a032281048b851965dd445ad3cebf04dd028234bfa9d34b6eca795cf065d9ad50d13453cf3dc057e6561868f47c4c7a5a9913a7461a21c456d2de3d943

                          • C:\Users\Admin\AppData\Local\Temp\1ff1d320-b219-46c2-8d3f-5201005ae929.tmp.node

                            Filesize

                            122KB

                            MD5

                            185918fbbf35a18cc15e01a76a221534

                            SHA1

                            f7c63ef63b3672fabbcb783571373b3cc52d3f0b

                            SHA256

                            278b1f0acbd3d4c6dbfb02eeb1021fd937376739a8c6067b63e38ce89c7d4427

                            SHA512

                            7d7358184ba24eda51255c797cd3947a72e03ccc1dc2a6991d64774732a7f134e415750150700e689fd4f69ffc4991cc6a9f196a60499958cbb6dc8b0bb0da9b

                          • C:\Users\Admin\AppData\Local\Temp\epsilon-Admin\Antivirus.txt

                            Filesize

                            231B

                            MD5

                            dec2be4f1ec3592cea668aa279e7cc9b

                            SHA1

                            327cf8ab0c895e10674e00ea7f437784bb11d718

                            SHA256

                            753b99d2b4e8c58bfd10995d0c2c19255fe9c8f53703bb27d1b6f76f1f4e83cc

                            SHA512

                            81728e3d31b72905b3a09c79d1e307c4e8e79d436fcfe7560a8046b46ca4ae994fdfaeb1bc2328e35f418b8128f2e7239289e84350e142146df9cde86b20bb66

                          • C:\Users\Admin\AppData\Local\Temp\epsilon-Admin\AutoFill Data\All Autofill Data.txt

                            Filesize

                            249B

                            MD5

                            cf7e4a12f932a3fddddacc8b10e1f1b0

                            SHA1

                            db6f9bc2be5e0905086b7b7b07109ef8d67b24ee

                            SHA256

                            1b6d3f6ad849e115bf20175985bed9bcfc6ec206e288b97ac14c3a23b5d28a4b

                            SHA512

                            fab79f26c1841310cc61e2f8336ca05281a9252a34a3c240e500c8775840374edb0a42094c64aa38a29ca79e1cafa114d6f1bbe3009060d32f8c1df9f088c12c

                          • C:\Users\Admin\AppData\Roaming\Microsoft\Spelling\en-US\default.dic

                            Filesize

                            2B

                            MD5

                            f3b25701fe362ec84616a93a45ce9998

                            SHA1

                            d62636d8caec13f04e28442a0a6fa1afeb024bbb

                            SHA256

                            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                            SHA512

                            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

                          • C:\Users\Admin\AppData\Roaming\TikToKBuilder\Network\Network Persistent State

                            Filesize

                            300B

                            MD5

                            03a8933ce335832692adec33f40a464d

                            SHA1

                            8704372b945cbdc3bda6f7347cc0380af904b023

                            SHA256

                            933bca5409a7b23a90c61223e68b7fbc61084cee88141629c552fe37c04140c6

                            SHA512

                            69f7aa328252068fe880ac66036d58efefac40bdea484027d8b5fba4ee840e9055b3f523b838c32baa28254486596081e43df5c9921f3c5b577f1f2e0b616ce4

                          • C:\Users\Admin\AppData\Roaming\TikToKBuilder\Network\Network Persistent State~RFe595356.TMP

                            Filesize

                            59B

                            MD5

                            2800881c775077e1c4b6e06bf4676de4

                            SHA1

                            2873631068c8b3b9495638c865915be822442c8b

                            SHA256

                            226eec4486509917aa336afebd6ff65777b75b65f1fb06891d2a857a9421a974

                            SHA512

                            e342407ab65cc68f1b3fd706cd0a37680a0864ffd30a6539730180ede2cdcd732cc97ae0b9ef7db12da5c0f83e429df0840dbf7596aca859a0301665e517377b

                          • memory/960-8-0x00007FFFE4A70000-0x00007FFFE4A71000-memory.dmp

                            Filesize

                            4KB

                          • memory/960-7-0x00007FFFE4190000-0x00007FFFE4191000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-139-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-140-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-141-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-146-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-145-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-148-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-149-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-147-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-150-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB

                          • memory/3084-151-0x00000286EE050000-0x00000286EE051000-memory.dmp

                            Filesize

                            4KB