Analysis

  • max time kernel
    1800s
  • max time network
    1498s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03-03-2024 20:57

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.

  • 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
  • Drops file in Windows directory 1 IoCs
  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Kills process with taskkill 1 IoCs
  • 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⤵
    • Loads dropped DLL
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2480
    • 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=1772 --field-trial-handle=1784,i,9383513570935312694,1628714311921341395,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:2
      2⤵
        PID:2380
      • 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=1868 --field-trial-handle=1784,i,9383513570935312694,1628714311921341395,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
        2⤵
          PID:4052
        • 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" --no-sandbox --no-zygote --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=2452 --field-trial-handle=1784,i,9383513570935312694,1628714311921341395,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:1
          2⤵
            PID:4844
          • 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⤵
            • Suspicious use of WriteProcessMemory
            PID:828
            • C:\Windows\system32\reg.exe
              C:\Windows\system32\reg.exe QUERY "HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Sessions"
              3⤵
                PID:2840
            • 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⤵
              • Suspicious use of WriteProcessMemory
              PID:4736
              • C:\Windows\system32\reg.exe
                C:\Windows\system32\reg.exe QUERY "HKCU\Software\Valve\Steam" /v SteamPath
                3⤵
                  PID:716
              • 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⤵
                • Suspicious use of WriteProcessMemory
                PID:2104
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get displayName /Format:List
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2152
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /d /s /c "wmic path win32_VideoController get name"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1364
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic path win32_VideoController get name
                  3⤵
                  • Detects videocard installed
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1600
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /d /s /c "cmd /c chcp 65001>nul && netsh wlan show profiles"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:968
                • C:\Windows\system32\cmd.exe
                  cmd /c chcp 65001
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2252
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    4⤵
                      PID:3996
                  • C:\Windows\system32\netsh.exe
                    netsh wlan show profiles
                    3⤵
                      PID:2944
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /d /s /c "taskkill /IM chrome.exe /F"
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:732
                    • C:\Windows\system32\taskkill.exe
                      taskkill /IM chrome.exe /F
                      3⤵
                      • Kills process with taskkill
                      PID:720
                  • 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=10.0.22000.1 --user-data-dir="C:\Users\Admin\AppData\Roaming\TikToKBuilder" --gpu-preferences=WAAAAAAAAADoAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAACEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=2916 --field-trial-handle=1784,i,9383513570935312694,1628714311921341395,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
                    2⤵
                    • Drops file in System32 directory
                    • Suspicious behavior: EnumeratesProcesses
                    PID:4692

                Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\Users\Admin\AppData\Local\D3DSCache\9a0be6f91b8dcf94\F4EB2D6C-ED2B-4BDD-AD9D-F913287E6768.idx

                  Filesize

                  64KB

                  MD5

                  2cc17f6889214a11eee800c013066c48

                  SHA1

                  fee183bc970dcd2cdabb7fbf848c072b73830601

                  SHA256

                  2c9214fcb652b225a8b0d4c69df9bf200116fcc8ba852d0cbd4e54763dce06db

                  SHA512

                  6daa7c2a0ee26663dcf78aff53b0bdb1417aa5ab44ce233fa1a5d72682258f0cdc5d8ac0301bb04b4184e99d7cbbf7420eb867caed7e97b365c3fdd774618961

                • C:\Users\Admin\AppData\Local\D3DSCache\9a0be6f91b8dcf94\F4EB2D6C-ED2B-4BDD-AD9D-F913287E6768.lock

                  Filesize

                  4B

                  MD5

                  f49655f856acb8884cc0ace29216f511

                  SHA1

                  cb0f1f87ec0455ec349aaa950c600475ac7b7b6b

                  SHA256

                  7852fce59c67ddf1d6b8b997eaa1adfac004a9f3a91c37295de9223674011fba

                  SHA512

                  599e93d25b174524495ed29653052b3590133096404873318f05fd68f4c9a5c9a3b30574551141fbb73d7329d6be342699a17f3ae84554bab784776dfda2d5f8

                • C:\Users\Admin\AppData\Local\D3DSCache\9a0be6f91b8dcf94\F4EB2D6C-ED2B-4BDD-AD9D-F913287E6768.val

                  Filesize

                  992B

                  MD5

                  7c9602e13ccaecb809b334d574a16758

                  SHA1

                  096f239745812ea031c368bf36c36965a534f7f8

                  SHA256

                  4cccd216c1c707b396c7db2f254775b133256e11e28339ffa17ec9da3fce3623

                  SHA512

                  add8c9fe505e5fdde9c8970bf4bb7b3db1a8f36ba0e4776e9d17e38d897e08b5de9fd9929143f475d153c89459d784e48fa5019232f69a87dc6aa250cffcf905

                • C:\Users\Admin\AppData\Local\Temp\161deac7-8711-4ba3-8642-2ae0b0e067b1.tmp.node

                  Filesize

                  1.6MB

                  MD5

                  bc3285978427f0121ff25a2bc45a9c04

                  SHA1

                  8e33c8673c2d55697dbaeb5eec0419bece8967a1

                  SHA256

                  0135692978c34ca3ff4ecc40f71516df66ad54bb3acf38dc144f87af15fc8744

                  SHA512

                  ac9e46a032281048b851965dd445ad3cebf04dd028234bfa9d34b6eca795cf065d9ad50d13453cf3dc057e6561868f47c4c7a5a9913a7461a21c456d2de3d943

                • 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\Local\Temp\epsilon-Admin\Passwords\All Passwords.txt

                  Filesize

                  231B

                  MD5

                  dec2be4f1ec3592cea668aa279e7cc9b

                  SHA1

                  327cf8ab0c895e10674e00ea7f437784bb11d718

                  SHA256

                  753b99d2b4e8c58bfd10995d0c2c19255fe9c8f53703bb27d1b6f76f1f4e83cc

                  SHA512

                  81728e3d31b72905b3a09c79d1e307c4e8e79d436fcfe7560a8046b46ca4ae994fdfaeb1bc2328e35f418b8128f2e7239289e84350e142146df9cde86b20bb66

                • C:\Users\Admin\AppData\Local\Temp\f9948d72-fcb7-4dcc-bcec-e09430043fa5.tmp.node

                  Filesize

                  122KB

                  MD5

                  3e5d324f642121f752aa5c0a952ed902

                  SHA1

                  2077b1dd6e28f876e6d450576b8abcd285a86961

                  SHA256

                  03f7d6182e0bd321d27aca9b4f1b768cd00d488dda83bb8fb5215e34fc074021

                  SHA512

                  d573fad38e38b89856f8f24f7ec5496aae3e9075e4bbe1ce33aa05fd48c73e1b14626809ba430d18619d5d110be9535047277aeff52cebcf181c553223e1056c

                • 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

                  c882b4693fb63a27f0e7d25239cd5dc7

                  SHA1

                  d85a48b065c4463ed8d47df67855952db458b76e

                  SHA256

                  c7a892031ca28553113236f37941fa9d2b8219dc25b139990a51349962496bdc

                  SHA512

                  9269c7775a50efcc4d93040337ac04e34ea094e4e0ad6ec1b2a493e828fe8a07787ef80a569e8fb8a89e683681f5d4639bcb9d33d50b44228ac5d29d4e13629f

                • C:\Users\Admin\AppData\Roaming\TikToKBuilder\Network\Network Persistent State~RFe5890e1.TMP

                  Filesize

                  59B

                  MD5

                  2800881c775077e1c4b6e06bf4676de4

                  SHA1

                  2873631068c8b3b9495638c865915be822442c8b

                  SHA256

                  226eec4486509917aa336afebd6ff65777b75b65f1fb06891d2a857a9421a974

                  SHA512

                  e342407ab65cc68f1b3fd706cd0a37680a0864ffd30a6539730180ede2cdcd732cc97ae0b9ef7db12da5c0f83e429df0840dbf7596aca859a0301665e517377b

                • memory/4692-136-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-137-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-138-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-139-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-140-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-141-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-142-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-132-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-131-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB

                • memory/4692-130-0x00000261C44F0000-0x00000261C44F1000-memory.dmp

                  Filesize

                  4KB