Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    10/09/2026, 12:36

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 11.8MB
  • Sample260910-ptefnstcna
  • SHA256 75ded0e5130839201ad84acfd076662da6544b45660841c755dcaf71b1b8d681
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 4 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.

  • 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 42 IoCs
  • 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 10 IoCs
  • Drops file in Program Files directory 17 IoCs
  • Drops file in Windows directory 13 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • 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 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 5 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:\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:4912
  • 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:4264
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 299F3FCD2BF958415BF93A4B35D9F7EC C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1912
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240667859 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:64
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5000.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240668687 11 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1532
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI54C4.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240669984 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4832
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2460
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 5A833834DB3C7910369449E90636ED42
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2888
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 89DF4D9D0B30135D2EC4912E3E8D5952 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:4152
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3948
    • C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-pv6mur-relay.screenconnect.com&p=443&s=007a1772-fb09-47a4-98f5-4bf82048b1c0&k=BgIAAACkAABSU0ExAAgAAAEAAQAd4IzCPPLq9HI1FwYPuUPJDfqk%2fxkWbDoOJFt4i52rXQmTnFQ%2fYTna60hGAsG5Qx2GMPnmINtSnyl9dECpp9A3K4Set0PzOO1V1w020yNCjCHP26opduSuqqENHlxIoA1yTMmCTo0frXuOv9VSkh31WWAUUql6feWmcKiG5fpxHRX1t8iuOWhRrAsCt73QLUmNSefhGk%2bGq0laBlxgQart8X0B%2bjI4evWp96EJ%2bfoU785V2bCJwPxuC2P22la%2bkaDWCOxDxftgvPBKVN3Ib19ZWPl%2fS6%2bf4%2fnzBB3k57GpbV1EoU%2fSA3sHHheldSvJhvS6uHpbM%2faiAaAw4ddQglLY&c=Gmail&c=&c=&c=&c=&c=&c=&c="
      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:2392
      • C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsClient.exe" "RunRole" "2ee9a4b2-b530-4022-87ed-7ac2dc2e95a3" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2424
      • C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsClient.exe" "RunRole" "fb6dfe0c-05fc-4ab9-90df-c002eae8ab3f" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:2404

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e589ab5.rbs

          • Path C:\Config.Msi\e589ab5.rbs
          • Size 214KB
          • SHA256 fa7fb91496236c93c37e37478dab0806a82530ad34ac3ece18459f6596878527
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.Client.dll
          • Size 412KB
          • SHA256 27e873d0fceefdd1a12ca77e3bbecec2ece7acdba433b47dca102c35e1c5896c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.ClientService.dll
          • Size 92KB
          • SHA256 78fa9cf69577f6990275c7c472f7114f9d0c85e660f3b9c81b085fc3cfbc8673
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 5956f9afb3ba610c38b2cfda88dd15be98783963769a12020c93ce05e749b3c3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.Core.dll
          • Size 582KB
          • SHA256 4eab8752d05cd31bafd07edde7d18061cb63eea99af3132460e6dc08bb5f9e73
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 ec4de5e6e9c079a30a5780d79ee662e0a4c6d009f0e3f911edc560973fb17d1e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 7511e679597572782241ff989c065c02f9f5a12ab37290b69a27226eda57ce75
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\app.config
          • Size 1KB
          • SHA256 be1bf12ed80c3398ae0c09edc4d64243acc09712a01ad37ddb7bcc926472d8df
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (25cdebda8cc64fa8)\system.config
          • Size 966B
          • SHA256 df5e16e0e7d2935cb0114176aa2a58d3a9ab8a54362c769aeb328084ea30a71c
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 bb5cdc5b67bb111ca6f77668d4d0bf91ae0b8544b21fb0e124e978828bd55ed5
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 0feeadfd731cf59ed17ff587a23985be5a8f40505b50a912908ba7400047d230
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 8efdeefea3c826a6bc283406fc736d0c62bf919bbfdfae68539caebb4e295948
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 4f175ff0e537f1b3e35a2536882738c90d407a5b6ee66e2bdafad90e113c05da
          • 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 ddebb6b1094dbef9e96754a74ebd4761d857864c9bd0b5f20a97259a6d7c8fe0
          • MD5 SHA1 SHA512 TLSH

          MSI4BD9.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp
          • Size 1.1MB
          • SHA256 400ff5b9a4439339876282909b23c397ffa208f4bcf64460fa2521284acf0b6e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp-\ScreenConnect.Core.dll
          • Size 572KB
          • SHA256 74f2d225b492eb77a5654bcaafec5162d0c5f72de884daa4c32daf54e2bff3d7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 2022f13b1f562d3cbef3a3926f0370a2de64e57ff281a121f90001a47499a356
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4BD9.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 93f910f732855000861c1b4e6c55a2dee0a8cbb2172d89c7a2bc99053746c193
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5000.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5000.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 361bbc692084841e4c8d22c89ca89c711d0fe17bc8759241736531a2f28de25b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI9CE8.tmp

          • Path C:\Windows\Installer\MSI9CE8.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e589ab4.msi

          • Path C:\Windows\Installer\e589ab4.msi
          • Size 11.8MB
          • SHA256 75ded0e5130839201ad84acfd076662da6544b45660841c755dcaf71b1b8d681
          • MD5 SHA1 SHA512 SSDEEP TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (25cdebda8cc64fa8)\user.config
          • Size 520B
          • SHA256 ff8fa3aad4001bd5a48edc3395626d9916552a87308079cea7620dce1b5d567c
          • MD5 SHA1 SHA512 TLSH

          vzbonwjs.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (25cdebda8cc64fa8)\vzbonwjs.newcfg
          • Size 683B
          • SHA256 4b8c0328e99486e7bc1cb55780570baba954e7aa9a48048ef1b63fa41000b57e
          • MD5 SHA1 SHA512 TLSH

          xc2slolt.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (25cdebda8cc64fa8)\xc2slolt.newcfg
          • Size 883B
          • SHA256 d7e1945a0a62ccb33c74961ac27d8c7b1f339e8738ab579c501f60eeda985338
          • MD5 SHA1 SHA512 TLSH

          memory/64-37-0x00000000053B0000-0x0000000005560000-memory.dmp

          memory/64-25-0x0000000002C90000-0x0000000002CBE000-memory.dmp

          memory/64-29-0x0000000002CD0000-0x0000000002CDC000-memory.dmp

          memory/64-33-0x0000000002DD0000-0x0000000002E66000-memory.dmp

          memory/64-38-0x0000000005B10000-0x00000000060B4000-memory.dmp

          memory/1532-70-0x0000000004D40000-0x0000000004D68000-memory.dmp

          memory/2392-195-0x0000000004A00000-0x0000000004A6C000-memory.dmp

          memory/2392-162-0x0000000004850000-0x0000000004A00000-memory.dmp

          memory/2392-198-0x00000000047C0000-0x0000000004801000-memory.dmp

          memory/2392-200-0x0000000004CF0000-0x0000000004DC6000-memory.dmp

          memory/2392-158-0x0000000004600000-0x0000000004696000-memory.dmp

          memory/2392-152-0x00000000043C0000-0x00000000043DA000-memory.dmp

          memory/2392-173-0x0000000004770000-0x00000000047C0000-memory.dmp

          memory/2392-196-0x0000000004B10000-0x0000000004BA2000-memory.dmp

          memory/2424-217-0x0000000002710000-0x000000000277C000-memory.dmp

          memory/2424-216-0x00000000005C0000-0x0000000000670000-memory.dmp

          memory/2424-219-0x000000001B5A0000-0x000000001B636000-memory.dmp

          memory/2424-220-0x000000001B7F0000-0x000000001B9A0000-memory.dmp

          memory/2424-221-0x0000000000E20000-0x0000000000E3A000-memory.dmp

          memory/2424-222-0x000000001BB30000-0x000000001BCB6000-memory.dmp

          memory/2424-223-0x0000000002780000-0x00000000027C1000-memory.dmp