Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    20/04/2026, 18:45

General

  • Target
    ScreenConnect.ClientSetup.exe
  • Size 12.2MB
  • Sample260420-xefzysev31
  • SHA256 fdfeabbadfcabe90ab096ffd086b8ee2a93267667752859b240d2170370af61b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 8 IoCs

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

  • 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.

  • ConnectWise ScreenConnect remote access tool

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

  • Enumerates connected drives 3 TTPs 46 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 7 IoCs
  • 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.

  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 17 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 42 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • 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 14 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 7 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3332
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.1.24.9579\9c0daf4edd13834d\ScreenConnect.ClientSetup.msi" SC_EXE_PATH="C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe"
      2⤵
      • Badlisted process makes network request
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2876
  • 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 WriteProcessMemory
    PID:5896
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 3D2E765AB4C27BAE6891908F352E7CFB C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:640
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240673125 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5728
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI630B.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240673562 10 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3984
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5C03.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240737281 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5548
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2644
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 993C8D0ED5F72D6E6868C0B59973E05F
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3364
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 7AEE8F78A896C1F8BA2A1DAFE9AF1643 E Global\MSI0000
        2⤵
        • Drops file in Windows directory
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2248
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:552
    • C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-pzzb0h-relay.screenconnect.com&p=443&s=f92b270a-5b52-483b-8f11-8b5f503cafe5&k=BgIAAACkAABSU0ExAAgAAAEAAQB1Md94kR5eIZx8qWMOlYHkVQP8aNjSOMn4RD7ftmC%2fhJZ3s7GxZNp3jlOx19BZhQ1WHoIYHrrW99Kv2LlwzgNv%2flnBv1hVxnDcdkfw2q%2bMgM64R8OT8SEaDR%2fT88EoVqSF4LAw0Ws0%2f6nBCE%2bk8dbIYJiF0KqKFPSDnbeAZHzKQQbwhqsAH%2fUR6lYvidc4vK%2bBkwLbpX0YhGiXzbEqyHkDUsD1koJV9Sha0AMXdeIMFy9tay95YOncmxHuzz%2bjge3xfuOBr3bvCLNzFhxOjZ4Tw735x077LTXget0wcyKKOZ3Z31hCLkxstO%2bqWlAOKOZ2HWyaK%2bVLLxo4OWPa0%2bGo"
      1⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3308
      • C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsClient.exe" "RunRole" "f230dd9f-1138-4e0b-bb89-83d185b9190a" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:232
      • C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsClient.exe" "RunRole" "622648c1-d842-448c-86d8-57f6325f33f7" "System"
        2⤵
        • Drops file in System32 directory
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:548

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e599060.rbs

          • Path C:\Config.Msi\e599060.rbs
          • Size 214KB
          • SHA256 82ee04cadc730c8fedc45688f76f34d1a6d714eb706748bb999bd3b6b21187ff
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\Client.en-US.resources
          • Size 64KB
          • SHA256 efdb0b4fcc38b52cbf72336bd107a814db8454003f3495de21e2026a148823ea
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.Client.dll
          • Size 411KB
          • SHA256 28ff8468ad2db8b41fe9d9a2971dd56fea0aecad14808fe4b31c9b1072d3b129
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.ClientService.dll
          • Size 90KB
          • SHA256 9cf2c77df0a1a1e854ec1bbc6940d96f508bfb4b0555a07657c77314803a717e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 01341bd42426c3d110136cc94433df00dbad690a56593f7cca41a93f698f214a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.Core.dll
          • Size 572KB
          • SHA256 92e831159d5e9f2676241ab7ce80060a0b1dc34684f83797aec93b3ecff41139
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 2292aac48ad575c6d1ed99c862e3408e254db34b8fea50cf3594aa08f3e875d0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 838KB
          • SHA256 3fa1fe4a588015cc94eceb06867f16a5e562293139fbf6b36bde21dba478968d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (9c0daf4edd13834d)\system.config
          • Size 968B
          • SHA256 08d7734ce25521195c1f084e724b1096e335cd68054f2b17f71a6f31387923f6
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 345e4005e44cfe6e6a0d0ca8d4ae54cb5c2ae804146db1eb7b1741af7bcd43a9
          • MD5 SHA1 SHA512 TLSH

          BA74182F76F15A9CF514DEF352303C95

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\BA74182F76F15A9CF514DEF352303C95
          • Size 737B
          • SHA256 ceded167756e333f15a8abc1358b63233849949a26b6d9c886924ca44480e40f
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 db568798258cb615ed027c076770210dc3624d1e8fedebd0bff19892e843f9c1
          • MD5 SHA1 SHA512 TLSH

          BA74182F76F15A9CF514DEF352303C95

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\BA74182F76F15A9CF514DEF352303C95
          • Size 248B
          • SHA256 6ec7bfe8c67391290e1e9d9ca193a4f0dba41405914eaecb953f01f22e1e8a44
          • MD5 SHA1 SHA512 TLSH

          rundll32.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\rundll32.exe.log
          • Size 746B
          • SHA256 76ced2c52d647683572ceac0687933e96e198b5a6f998457fa334763cc1ef978
          • MD5 SHA1 SHA512 TLSH

          MSI6116.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp
          • Size 1.1MB
          • SHA256 cd6bccce073b2a5205840ec31c91df0d443cc57c68756de2c03e21db8e3fc157
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp-\ScreenConnect.Core.dll
          • Size 562KB
          • SHA256 c51a2b5cb5054ec0136e332bf290c8af3392d7936b5137a07423df08ab33d264
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 432abf3a198ff64fb2c660eb06b2bb33a16cf69fd28d836cfcb65c43d37dc462
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI6116.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 10933424536d53e397f651915f862c933199c50722943c236b020787b2e8f147
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI630B.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI630B.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 528242c7745783b3b4ae72fec13bb9bd49b17b0e00f60c027351147f21fdd359
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.1.24.9579\9c0daf4edd13834d\ScreenConnect.ClientSetup.msi
          • Size 9.7MB
          • SHA256 6f83f07369a925e3e30d603272222a6baa718a7e7105a1e715e93958787d5ecd
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI9206.tmp

          • Path C:\Windows\Installer\MSI9206.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (9c0daf4edd13834d)\user.config
          • Size 588B
          • SHA256 5fbf06637a07252fc11cb684feaf76bca0a56d8b7319e9c36c798c63c74176e7
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (9c0daf4edd13834d)\user.config
          • Size 588B
          • SHA256 74eb7183b0c2e08b8f4085877a687f6dda9bb9d682f4211c35c7b5df4d8801e6
          • MD5 SHA1 SHA512 TLSH

          memory/232-236-0x000000001B4D0000-0x000000001B564000-memory.dmp

          memory/232-255-0x0000000000E80000-0x0000000000E9A000-memory.dmp

          memory/232-254-0x000000001BA60000-0x000000001BBE8000-memory.dmp

          memory/232-263-0x0000000000E20000-0x0000000000E2C000-memory.dmp

          memory/232-235-0x00000000026E0000-0x000000000274A000-memory.dmp

          memory/232-248-0x000000001B720000-0x000000001B8D0000-memory.dmp

          memory/232-256-0x0000000002670000-0x000000000268A000-memory.dmp

          memory/232-234-0x0000000000480000-0x000000000052A000-memory.dmp

          memory/232-257-0x0000000002690000-0x00000000026D1000-memory.dmp

          memory/548-281-0x0000000002350000-0x000000000235C000-memory.dmp

          memory/640-95-0x00000000010B0000-0x000000000125C000-memory.dmp

          memory/640-250-0x00000000010B0000-0x000000000125C000-memory.dmp

          memory/2248-251-0x0000000000B50000-0x0000000000CFC000-memory.dmp

          memory/2876-252-0x0000000000D50000-0x0000000000EFC000-memory.dmp

          memory/2876-16-0x0000000000D50000-0x0000000000EFC000-memory.dmp

          memory/2876-17-0x0000000004760000-0x0000000004767000-memory.dmp

          memory/2876-253-0x0000000004760000-0x0000000004767000-memory.dmp

          memory/3308-259-0x0000000003690000-0x000000000369B000-memory.dmp

          memory/3308-206-0x00000000036B0000-0x00000000036CA000-memory.dmp

          memory/3308-218-0x00000000038C0000-0x0000000003910000-memory.dmp

          memory/3308-212-0x0000000003780000-0x0000000003814000-memory.dmp

          memory/3308-222-0x0000000003B80000-0x0000000003BEA000-memory.dmp

          memory/3308-229-0x0000000003F80000-0x0000000004055000-memory.dmp

          memory/3308-216-0x00000000039D0000-0x0000000003B80000-memory.dmp

          memory/3308-227-0x0000000003990000-0x00000000039D1000-memory.dmp

          memory/3308-261-0x0000000004920000-0x0000000004927000-memory.dmp

          memory/3308-225-0x0000000003D90000-0x0000000003E22000-memory.dmp

          memory/3308-260-0x0000000003950000-0x0000000003987000-memory.dmp

          memory/3332-5-0x0000000005FD0000-0x0000000005FF8000-memory.dmp

          memory/3332-1-0x0000000005E80000-0x0000000005E88000-memory.dmp

          memory/3332-0-0x0000000006020000-0x0000000006030000-memory.dmp

          memory/3332-3-0x0000000005EA0000-0x0000000005EAC000-memory.dmp

          memory/3332-4-0x0000000005F20000-0x0000000005FB4000-memory.dmp

          memory/3332-6-0x0000000006030000-0x00000000061E0000-memory.dmp

          memory/3332-7-0x0000000006790000-0x0000000006D36000-memory.dmp

          memory/3332-8-0x0000000006020000-0x0000000006030000-memory.dmp

          memory/3332-2-0x0000000006020000-0x0000000006030000-memory.dmp

          memory/3364-249-0x0000000001640000-0x00000000017EC000-memory.dmp

          memory/3984-88-0x0000000002950000-0x0000000002978000-memory.dmp

          memory/3984-96-0x0000000000950000-0x0000000000AFC000-memory.dmp

          memory/3984-128-0x0000000000950000-0x0000000000AFC000-memory.dmp

          memory/3984-129-0x0000000004E60000-0x0000000004E67000-memory.dmp

          memory/3984-97-0x0000000004E60000-0x0000000004E67000-memory.dmp

          memory/5548-162-0x00000000011B0000-0x000000000135C000-memory.dmp

          memory/5728-61-0x0000000001190000-0x000000000133C000-memory.dmp

          memory/5728-55-0x0000000005770000-0x0000000005920000-memory.dmp

          memory/5728-51-0x0000000005520000-0x00000000055B4000-memory.dmp

          memory/5728-47-0x0000000005470000-0x000000000547C000-memory.dmp

          memory/5728-43-0x0000000005430000-0x000000000545E000-memory.dmp

          memory/5896-258-0x000001FE74AB0000-0x000001FE74ABC000-memory.dmp