Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    05/06/2026, 16:28

General

  • Target
    ScreenConnect.ClientSetup3.exe
  • Size 19.6MB
  • Sample260605-tynblaa151
  • SHA256 bad74be50095a57403a321324ec8c28f536bef2e573090570b4a8abad58ea0e9
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 3 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 2 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 2 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.

  • Modifies data under HKEY_USERS 8 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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.ClientSetup3.exe
    "C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3020
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.1.18.9566\d3787c025fe5442b\ScreenConnect.ClientSetup.msi" SC_EXE_PATH="C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup3.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:3252
  • 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:5424
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 30A0A70AC327F0951FCBC8A401204746 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4700
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240682046 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5100
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI86C0.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240682703 11 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:692
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI8AB9.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240683718 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4340
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:752
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 2C33C1BA964136D31F648F2BE2A5B8CC
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:664
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding A37215114E53AE96B79E759892F22EF1 E Global\MSI0000
        2⤵
        • Drops file in Windows directory
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4504
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3356
    • C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-xz3xeo-relay.screenconnect.com&p=443&s=b7e48443-bec9-4c0a-b9c4-c8976a5c0cae&k=BgIAAACkAABSU0ExAAgAAAEAAQBR72bZ0r7%2bxIbdysVw%2beH0P5npknSvijdEhxCTg28qeuDN3ojhNghs3cHt7IYnGPzOgttnKONOjWRCBhQQVXlRRvdJ8EylC4PhcrJ7ELqm%2fpBrFeuQ39akuoMroxDK51%2fNp8ji6cZPuGuD8BsULQATIDphq7S99tKddUJzl0bCrM9f4EWO%2bTXQT9jFAvR9E57%2fsDNM1ndw0SWvdzjlEFamEyPXDbaCXpp0Z0iuD1y5lsUfxLB7xSsi3RdIga8Rh6Au0GpGJNc%2brAWAMkZG%2bVfYxF3Y4FXiElK5HeuiczZaCFYG%2b3Rgb7gVF2uCm1EJS%2bcCQGuGVQ6LWrtGbarBhYvX&t=MYWorld"
      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:3912
      • C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.WindowsClient.exe" "RunRole" "c6ed6116-4c99-4d41-a855-7a8a93f6c91a" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2300

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e58bd12.rbs

          • Path C:\Config.Msi\e58bd12.rbs
          • Size 214KB
          • SHA256 3a2aa43d5be1e54ada0fec59b69d0f8beb01ba5c5dec9430538b2590e7917945
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\Client.en-US.resources
          • Size 64KB
          • SHA256 efdb0b4fcc38b52cbf72336bd107a814db8454003f3495de21e2026a148823ea
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.Client.dll
          • Size 616KB
          • SHA256 204d17d90001f6848449cb8e6763f4884d60c7ce0b802d33a5b5025e63f9437b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.ClientService.dll
          • Size 174KB
          • SHA256 81e434159e91fe93c546d9cbb1a35a0438c98e2467836a586c5cdd3175eb2f09
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 8e089d4e6246bf8f0bed7fab867675c6b24c4e783721e6970ff901d696a6de20
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.Core.dll
          • Size 1.3MB
          • SHA256 ff590d39b36694947d6cb7bb79aa76ebe8e68122e380d4a858035977c0aa3d95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.Windows.dll
          • Size 1.9MB
          • SHA256 5c1f4fb54bb584cfa7a89f0785addc086e9824046dc40e36d098edd4dcaf1087
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 838KB
          • SHA256 4e3fe3503e8db70bb612a3b70112572441b70133ef2742e6a5fcb45607bc1cb3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (d3787c025fe5442b)\system.config
          • Size 964B
          • SHA256 8247698f6aa07fb96f16d1ecb3004fd83a8cb35bfdb3f7b3a287bf3bce6f7768
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 7dc9a366a07e1ac15cce3dea7351b3cd1500f438dc7011062abbe32ddbaac363
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 4ba097cef495afcda2bdb32986a0bcb16cc90a2eaa1fd97ef3579b77432d2086
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 75383e0dd0876491fce9edfdab8ab7bb088119c168c74bf83f03e3390d6999d7
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 b2d8a2ceeb47b98608001ad25fd34c844e95c979fdcdf478dee47aadd7b46c7f
          • 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

          MSI8410.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp
          • Size 1.8MB
          • SHA256 ac1b1afb6c8e73e6a476de1c2ef07e8d31888468ba705b9ac548a0e860017363
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp-\ScreenConnect.Core.dll
          • Size 1.3MB
          • SHA256 f530f5e1f75d1d13436347c58dc72947a50d030bfbc4b531c922e3450b98bd60
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 54ed2a3200e96d8cf603e594f148f2832340fa23a6ce0140a16b666966cd5d3b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8410.tmp-\ScreenConnect.Windows.dll
          • Size 1.8MB
          • SHA256 d61ea81371332c01be9969d359df8412b7e1b0f5803c08dfc480c0421dce8a44
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI86C0.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI86C0.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 381KB
          • SHA256 0dfb99e851541cef064abc98270922ca8f9380635b58f43219557e828634f3be
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\26.1.18.9566\d3787c025fe5442b\ScreenConnect.ClientSetup.msi
          • Size 15.9MB
          • SHA256 4253a95bb43b8c3465238542fb9aee06e026c2aae5c0a7ec895eb196ac442a99
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIBE89.tmp

          • Path C:\Windows\Installer\MSIBE89.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/692-89-0x0000000004A90000-0x0000000004AF6000-memory.dmp

          memory/2300-213-0x0000000002900000-0x0000000002930000-memory.dmp

          memory/2300-211-0x000000001E660000-0x000000001E7E8000-memory.dmp

          memory/2300-209-0x000000001CF10000-0x000000001D060000-memory.dmp

          memory/2300-212-0x0000000002870000-0x00000000028A0000-memory.dmp

          memory/2300-210-0x000000001D240000-0x000000001D420000-memory.dmp

          memory/2300-214-0x0000000002930000-0x0000000002971000-memory.dmp

          memory/2300-207-0x0000000000610000-0x000000000079A000-memory.dmp

          memory/2300-208-0x000000001C970000-0x000000001CA0E000-memory.dmp

          memory/3020-2-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-10-0x00000000063D0000-0x0000000006462000-memory.dmp

          memory/3020-0-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-8-0x00000000068E0000-0x0000000006E86000-memory.dmp

          memory/3020-12-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-7-0x0000000006150000-0x0000000006330000-memory.dmp

          memory/3020-6-0x0000000005F40000-0x0000000005FA6000-memory.dmp

          memory/3020-11-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-9-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-5-0x0000000006000000-0x0000000006150000-memory.dmp

          memory/3020-1-0x0000000001D00000-0x0000000001D08000-memory.dmp

          memory/3020-3-0x0000000005FF0000-0x0000000006000000-memory.dmp

          memory/3020-4-0x0000000002020000-0x000000000202C000-memory.dmp

          memory/3912-201-0x0000000004A70000-0x0000000004B45000-memory.dmp

          memory/3912-170-0x0000000001BA0000-0x0000000001BD0000-memory.dmp

          memory/3912-199-0x0000000004290000-0x00000000042D1000-memory.dmp

          memory/3912-197-0x00000000047E0000-0x000000000487E000-memory.dmp

          memory/3912-193-0x0000000004230000-0x0000000004280000-memory.dmp

          memory/3912-180-0x0000000004600000-0x00000000047E0000-memory.dmp

          memory/3912-176-0x00000000042D0000-0x0000000004420000-memory.dmp

          memory/5100-45-0x0000000004B50000-0x0000000004B7E000-memory.dmp

          memory/5100-49-0x0000000004B90000-0x0000000004B9C000-memory.dmp

          memory/5100-57-0x0000000005020000-0x0000000005200000-memory.dmp

          memory/5100-53-0x0000000004CF0000-0x0000000004E40000-memory.dmp