Analysis

  • max time kernel
    152s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-03-2024 00:36

General

  • Target

    WindowsBootManager.exe

  • Size

    168.6MB

  • MD5

    2c11c9fd2618f52433766e7601fc0ab6

  • SHA1

    5431178570a6040912ec7486fbb677b8c423c6f5

  • SHA256

    b29714d2a978638b6ce17ec1c16f8344e46379c93f1e88225bc962419b9d1c04

  • SHA512

    b0a66392aff2f7eb8d019cb9d7c210a9fa76090985eb35d2cb032c44f345705720f6cb1889eff3aa3c2a3b9587f26bfbfc3d247e7a6229ef1882ee0890e95e89

  • SSDEEP

    1572864:sXic4qb6IXgDaJfpEQHgelkLK4z34xGWw0TwW1T/qWhehZvmCtS3JPfyzG49FndX:yVKvWZ8tyx4u

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\WindowsBootManager.exe
    "C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5020
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /d /s /c "wmic CsProduct Get UUID"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4328
      • C:\Windows\System32\Wbem\WMIC.exe
        wmic CsProduct Get UUID
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4124
    • C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe
      "C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe" --type=gpu-process --user-data-dir="C:\Users\Admin\AppData\Roaming\WindowsBootManager" --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=1928 --field-trial-handle=1932,i,15703836601524802178,2997979434251558199,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:2
      2⤵
        PID:116
      • C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe
        "C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --user-data-dir="C:\Users\Admin\AppData\Roaming\WindowsBootManager" --mojo-platform-channel-handle=2008 --field-trial-handle=1932,i,15703836601524802178,2997979434251558199,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
        2⤵
          PID:3200
        • C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe
          "C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe" --type=renderer --user-data-dir="C:\Users\Admin\AppData\Roaming\WindowsBootManager" --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=2540 --field-trial-handle=1932,i,15703836601524802178,2997979434251558199,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:1
          2⤵
          • Checks computer location settings
          PID:4816
        • 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:4792
          • C:\Windows\system32\reg.exe
            C:\Windows\system32\reg.exe QUERY "HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Sessions"
            3⤵
              PID:672
          • 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:700
            • C:\Windows\system32\reg.exe
              C:\Windows\system32\reg.exe QUERY "HKCU\Software\Valve\Steam" /v SteamPath
              3⤵
                PID:3324
            • 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:4648
              • C:\Windows\System32\Wbem\WMIC.exe
                wmic /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get displayName /Format:List
                3⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:4952
            • 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:1616
              • C:\Windows\System32\Wbem\WMIC.exe
                wmic path win32_VideoController get name
                3⤵
                • Detects videocard installed
                PID:5104
            • 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:1900
              • C:\Windows\system32\cmd.exe
                cmd /c chcp 65001
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:4632
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  4⤵
                    PID:3784
                • C:\Windows\system32\netsh.exe
                  netsh wlan show profiles
                  3⤵
                    PID:3284
                • C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.exe
                  "C:\Users\Admin\AppData\Local\Temp\WindowsBootManager.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\WindowsBootManager" --gpu-preferences=WAAAAAAAAADoAAAMAAAAAAAAAAAAAAAAAABgAAAAAAA4AAAAAAAAAAAAAACEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --mojo-platform-channel-handle=2404 --field-trial-handle=1932,i,15703836601524802178,2997979434251558199,262144 --enable-features=kWebSQLAccess --disable-features=SpareRendererForSitePerProcess,WinDelaySpellcheckServiceInit,WinRetrieveSuggestionsOnlyOnDemand --variations-seed-version /prefetch:8
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious behavior: EnumeratesProcesses
                  PID:4000

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\3c6ccb63-a61f-40b2-8003-59176967dd21.tmp.node

                Filesize

                1.6MB

                MD5

                bc3285978427f0121ff25a2bc45a9c04

                SHA1

                8e33c8673c2d55697dbaeb5eec0419bece8967a1

                SHA256

                0135692978c34ca3ff4ecc40f71516df66ad54bb3acf38dc144f87af15fc8744

                SHA512

                ac9e46a032281048b851965dd445ad3cebf04dd028234bfa9d34b6eca795cf065d9ad50d13453cf3dc057e6561868f47c4c7a5a9913a7461a21c456d2de3d943

              • C:\Users\Admin\AppData\Local\Temp\75cdfbd5-53ee-499a-8fac-6533197851cb.tmp.node

                Filesize

                122KB

                MD5

                85afc461dcaf3f5898ccba83d59edd81

                SHA1

                582dda12636dfd9d73118dbc057d7d803f7585be

                SHA256

                89c6360ac30b5db69e4431305c21fb62b69318808e86dd560d16e881be0ae8a3

                SHA512

                c4654d2f3c834cfca36e4d10ebca4f33f3b3a8c753663061a3350b450b24fd3741c73f7f1f24f3be625c459cd80890d33a0db27b7e623a1a633579120b8c8d37

              • 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\WindowsBootManager\Network\Network Persistent State

                Filesize

                300B

                MD5

                f96da9ac3e7b1cc2ab8a9f165c047726

                SHA1

                e67304a844155d0ddd538932ea30f507027a5cfd

                SHA256

                a95e02253424d109379b5381ff8d24cfe12c49294cfb5de42e52e0b3cbb2c6f5

                SHA512

                347e689049ce7467a0fcffb37cccc3c9f74c3fef2fdee153bee8ebda354514c3a9dd3c80b03fb12b10a1e478444999d0d9c0046b2eb722c092f43a7b76c4c594

              • C:\Users\Admin\AppData\Roaming\WindowsBootManager\Network\Network Persistent State~RFe58caec.TMP

                Filesize

                59B

                MD5

                2800881c775077e1c4b6e06bf4676de4

                SHA1

                2873631068c8b3b9495638c865915be822442c8b

                SHA256

                226eec4486509917aa336afebd6ff65777b75b65f1fb06891d2a857a9421a974

                SHA512

                e342407ab65cc68f1b3fd706cd0a37680a0864ffd30a6539730180ede2cdcd732cc97ae0b9ef7db12da5c0f83e429df0840dbf7596aca859a0301665e517377b

              • memory/4000-147-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-146-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-148-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-152-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-153-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-154-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-155-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-157-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-156-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB

              • memory/4000-158-0x000002504C6A0000-0x000002504C6A1000-memory.dmp

                Filesize

                4KB