Resubmissions

29/10/2026, 17:49

261029-weelfs114p8

29/10/2026, 17:14

261029-vr3clsds8x8

Analysis

  • user interaction
    yes
  • max time kernel
    898s
  • max time network
    875s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260911-en
  • resource tags

    arch:x64arch:x86image:win11-20260911-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    29/10/2026, 17:49

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 9.8MB
  • Sample261029-weelfs114p
  • SHA256 ae957e1efbe383ca96fac9e3f1174792cff1be8bf77c11c3f1a7eea041e455dd
  • 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 13 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 4 IoCs
  • Loads dropped DLL 42 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 8 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 7 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 4 IoCs

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

  • Modifies data under HKEY_USERS 19 IoCs
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 13 IoCs
  • Suspicious use of SendNotifyMessage 11 IoCs
  • Suspicious use of SetWindowsHookEx 1 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:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2572
  • 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:3396
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 0F1EBF9248CC1B7E0EB3F9F546C09850 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240705796 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3356
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIE626.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240707171 10 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • Reads the TCP/IP host and domain name from the registry
        • System Location Discovery: System Language Discovery
        PID:3872
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIEC61.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240708718 17 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4524
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2768
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding AD40DA337D7BF48926A0C9DA05C81AE8
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3004
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 9FFB50330AF81F8F01AF4252AD753734 E Global\MSI0000
        2⤵
        • Drops file in Windows directory
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:416
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2652
    • C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-r7uzns-relay.screenconnect.com&p=443&s=3fd52c48-647d-49fc-b1c4-ddd65426e574&k=BgIAAACkAABSU0ExAAgAAAEAAQCVeZaGsnFmAgV9Y%2f49Aejh8DNnZQYmyIgW96E%2brJ2y3kyCiUmWdUGWU1QeTZZL18HIqD1Q0LlSiyOUjB9i0ChNyogs4iayzgjs4dqCeuBc1qLADRaesIZksR2KNqTEDRXGjA4pbDcUf6MxnnqjH9GUQB%2bLg6F0F%2b%2bo2jLCvs%2ftVrJaUUnE0ZrD%2fL%2bzKz3WFJ0BXazhZVaZL7pINyfkkYV1gbDg%2bhmH8OVgiN9w7fPl0UXmGd30k%2bDkku1srCjgi3YOtRD0%2fHcT0I9%2fRik4c6TqCE0JRm%2fhJ7lUnPQ65aL5J0aX53FHfL0uhFGsBy5WV%2bbt%2f9LQiRSVtuXqgRWmkCXa"
      1⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • Executes dropped EXE
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4692
      • C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe" "RunRole" "fc064e28-9754-4f99-8596-80e444c209b9" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2264
      • C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe" "RunRole" "3f90b941-28a0-4d31-8048-b1f9352e1c93" "System"
        2⤵
        • Drops file in System32 directory
        • Executes dropped EXE
        • Reads the TCP/IP host and domain name from the registry
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:4524
      • C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsClient.exe" "RunRole" "d2cae402-0656-4811-8d99-f09ffed7bc8b" "System"
        2⤵
        • Executes dropped EXE
        • Reads the TCP/IP host and domain name from the registry
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:4408
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:3140

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e592552.rbs

          • Path C:\Config.Msi\e592552.rbs
          • Size 214KB
          • SHA256 d20af703140cdd57cf4eb3642713100eab9f6fcee8114f9f958afa7281649e08
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.Client.dll
          • Size 412KB
          • SHA256 27e873d0fceefdd1a12ca77e3bbecec2ece7acdba433b47dca102c35e1c5896c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.ClientService.dll
          • Size 92KB
          • SHA256 78fa9cf69577f6990275c7c472f7114f9d0c85e660f3b9c81b085fc3cfbc8673
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 5956f9afb3ba610c38b2cfda88dd15be98783963769a12020c93ce05e749b3c3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.Core.dll
          • Size 582KB
          • SHA256 4eab8752d05cd31bafd07edde7d18061cb63eea99af3132460e6dc08bb5f9e73
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 ec4de5e6e9c079a30a5780d79ee662e0a4c6d009f0e3f911edc560973fb17d1e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 7511e679597572782241ff989c065c02f9f5a12ab37290b69a27226eda57ce75
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (c84d7728f7bb0dee)\system.config
          • Size 974B
          • SHA256 5bfd2b098bef763de8bafcc6ffe94e4b5352a0f934c082bfbeb7fe9c13d6c87f
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 9311d868ac69a7d9ce3fb60eccfce25ba7a6ed5e6f037ed90c4fe86fc65b7e1e
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 2275f4b45440eb1461a5a185438d405110ac9262b0c350386811aa2b2521443a
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 b26f9256d61bcad05cb3614594b319b93fd02f0fe03f89782540c07212df0dfd
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 2150652a28396a66c1063ad68bc6b1c75a0ee136fee72c4654a84819cc422c69
          • 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

          MSIE078.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp
          • Size 1.1MB
          • SHA256 400ff5b9a4439339876282909b23c397ffa208f4bcf64460fa2521284acf0b6e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp-\ScreenConnect.Core.dll
          • Size 572KB
          • SHA256 74f2d225b492eb77a5654bcaafec5162d0c5f72de884daa4c32daf54e2bff3d7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 2022f13b1f562d3cbef3a3926f0370a2de64e57ff281a121f90001a47499a356
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE078.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 93f910f732855000861c1b4e6c55a2dee0a8cbb2172d89c7a2bc99053746c193
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE626.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSIE626.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 361bbc692084841e4c8d22c89ca89c711d0fe17bc8759241736531a2f28de25b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI2784.tmp

          • Path C:\Windows\Installer\MSI2784.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e592553.msi

          • Path C:\Windows\Installer\e592553.msi
          • Size 9.8MB
          • SHA256 ae957e1efbe383ca96fac9e3f1174792cff1be8bf77c11c3f1a7eea041e455dd
          • MD5 SHA1 SHA512 SSDEEP TLSH

          1ny45npp.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (c84d7728f7bb0dee)\1ny45npp.newcfg
          • Size 884B
          • SHA256 63d5c7e40f5eb2636e6b2378c4a5a734fb5b37d7d9dae20076b3b0d184af7270
          • MD5 SHA1 SHA512 TLSH

          c5333fct.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (c84d7728f7bb0dee)\c5333fct.newcfg
          • Size 884B
          • SHA256 225428f53839624b9f06163b27530976e40839cd1242e6e6af07a68d7b7f07c5
          • MD5 SHA1 SHA512 TLSH

          dfzxudmy.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (c84d7728f7bb0dee)\dfzxudmy.newcfg
          • Size 683B
          • SHA256 d97440166d49d43ab235302f62743039cb29dd5026e2fdd05f2af42568b967aa
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (c84d7728f7bb0dee)\user.config
          • Size 520B
          • SHA256 65680d60e879b10d78ef6b716c7d283fd32b9604493746cd9a0995339c230897
          • MD5 SHA1 SHA512 TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 65b3764f405d401a8fc2950ac8b0e07bcfb30f118804fc8e24cc24eebf43d5b6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {ec28ba0a-1791-4fdd-b22f-7ee7ac9ac1a2}_OnDiskSnapshotProp

          • Path \??\Volume{5acbaf70-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{ec28ba0a-1791-4fdd-b22f-7ee7ac9ac1a2}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 bacabc6011b4da96346a1da6d2c8f58d742ded79ec9ca8dbca9737365b03c4da
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/2264-221-0x0000000000650000-0x0000000000700000-memory.dmp

          memory/2264-228-0x000000001E2F0000-0x000000001E478000-memory.dmp

          memory/2264-227-0x0000000000F30000-0x0000000000F4A000-memory.dmp

          memory/2264-226-0x000000001CF00000-0x000000001D0B0000-memory.dmp

          memory/2264-225-0x000000001CCB0000-0x000000001CD46000-memory.dmp

          memory/2264-222-0x0000000002980000-0x00000000029EC000-memory.dmp

          memory/3356-29-0x0000000005320000-0x000000000534E000-memory.dmp

          memory/3356-33-0x0000000002FC0000-0x0000000002FCC000-memory.dmp

          memory/3356-42-0x0000000005DF0000-0x0000000006396000-memory.dmp

          memory/3356-37-0x0000000005440000-0x00000000054D6000-memory.dmp

          memory/3356-41-0x0000000005690000-0x0000000005840000-memory.dmp

          memory/3872-74-0x0000000005050000-0x0000000005078000-memory.dmp

          memory/4692-157-0x0000000003BA0000-0x0000000003BBA000-memory.dmp

          memory/4692-206-0x0000000004460000-0x0000000004536000-memory.dmp

          memory/4692-163-0x0000000003DD0000-0x0000000003E66000-memory.dmp

          memory/4692-201-0x0000000003FB0000-0x000000000401C000-memory.dmp

          memory/4692-202-0x0000000004270000-0x0000000004302000-memory.dmp

          memory/4692-167-0x0000000004020000-0x00000000041D0000-memory.dmp

          memory/4692-180-0x0000000003EF0000-0x0000000003F40000-memory.dmp

          memory/4692-204-0x0000000003F40000-0x0000000003F81000-memory.dmp