Analysis

  • max time kernel
    149s
  • max time network
    128s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    25/09/2026, 18:20

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 16.2MB
  • Sample260925-wy896stbjf
  • SHA256 5d0d8a2efa7007e1717f0c5b3827f68592029e0c994588d21ae5f4497eca0341
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 2 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 47 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 9 IoCs
  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 17 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 6 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 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 2 IoCs
  • Suspicious use of SetWindowsHookEx 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
    • Suspicious use of SetWindowsHookEx
    PID:5504
  • 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:252
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding B0B891DC3E94C86BE29C118942F5AAEF C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5764
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240752171 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5172
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI9C18.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240753718 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:4984
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSIA84E.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240756859 17 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5988
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:5032
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 6751B7320359D98A081443CE37B133F6
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4860
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding A7A3D332EB367B7145532F2884BE37A7 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:2644
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4320
    • C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-mu4rll-relay.screenconnect.com&p=443&s=a70d6f6d-46af-443e-962f-215d9db0bb39&k=BgIAAACkAABSU0ExAAgAAAEAAQB9hAc5rjQWd65tjrc%2b%2bqEN%2bOMatE1SJufl%2fKRahue6XPqbaO3G0r%2faJwgGLJExBQvAedf4ypogkMXFmHuYvhT9Y6pkvGIcHrx5fwMnMFPv2PVo57ZKoLgUF7Wisd2HHO6U0jO85Ns%2fk3hKuzyQNyxktlqfvLvrHQnafPkOk54I%2bpsVosmoP6mGTBfNb%2ftgopOk%2fcXY%2fW%2bqMDOG3wXhr%2fDxk%2fwT79UDnpSN4VznzZYd0dsD1nv9IvswR3lwJJRbAEqDFfmc7vEmaL7APYkbseTTMQj1CpYzgsPkWrKsoakRjp2jlGeWUfjYCvWQHAcLZLKFalMOzPJpHnngQ79dHc%2b6"
      1⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • 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:592
      • C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe" "RunRole" "12b694f9-99a4-4441-b4ef-549c4541edd0" "User"
        2⤵
        • Executes dropped EXE
        PID:3304
      • C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe" "RunRole" "e5ffbbee-2143-4c0b-ac08-1aa71a1b8c99" "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:3168

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5a065b.rbs

          • Path C:\Config.Msi\e5a065b.rbs
          • Size 214KB
          • SHA256 7a953f12e6999b21520d1206a1352804228bd7b1043e84ce2c1c040698e206b1
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.Client.dll
          • Size 615KB
          • SHA256 787a02b1938e8c1ce52448b8779d2c9c47029664f97185177c2584e8f980abc4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.ClientService.dll
          • Size 176KB
          • SHA256 579fa008b8c96612163fd8a89a978140a652b3739867772df0711fca148705aa
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 d887f20ec383d7ce3a5727856bf7fa68ceb972108b6d0a5dd9924707e820dc24
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.Core.dll
          • Size 1.3MB
          • SHA256 5b2d14e237485c0164d865d8a94f8a8bed28ab0db52c6a7ef99f7ebb9648d324
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.Windows.dll
          • Size 1.9MB
          • SHA256 88dd22f6f0ca70d10c64ca919b0d8b6d73e84c1d567d4b8d15b6e9a9b60d6d8f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe
          • Size 1.6MB
          • SHA256 b7a495f517b9bf23f529552b145121f922ab4915e24b663ae68b3007daea3804
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 239377f4d2345d2a4ff6e3cbebd83c6edb06db4daea389159d19770a2dfcb80c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (88e2de44f57dd79d)\system.config
          • Size 972B
          • SHA256 f45156bef5f43245ebc25841f55cdef2439ccfd4050a1f512318b1ba88799a54
          • MD5 SHA1 SHA512 TLSH

          MSI94C4.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp
          • Size 1.9MB
          • SHA256 1dabfa60015c186a4315f16d46d9e53435dc259c52843e73dac0d04be92f9a84
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp-\ScreenConnect.Core.dll
          • Size 1.3MB
          • SHA256 e5fd82d18c2dcaadbfc4b72b56573e819cc3e8ee6406f2edb982cc073dc607bb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 cf8505204b1458dac9cb3002fd5bbd5fac43c5b4702aa0153fb4b9a2cfcf954a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI94C4.tmp-\ScreenConnect.Windows.dll
          • Size 1.8MB
          • SHA256 ed1b4eb6c24c85392f692bf5863d9ccb76575051bb605360961b9d7624a371c6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI9C18.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI9C18.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 390KB
          • SHA256 c469358d585fa9f1637a02d194e162e454d90b8dc7e4939f88b36e09b04a7a96
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIDED.tmp

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

          e5a065a.msi

          • Path C:\Windows\Installer\e5a065a.msi
          • Size 16.2MB
          • SHA256 5d0d8a2efa7007e1717f0c5b3827f68592029e0c994588d21ae5f4497eca0341
          • MD5 SHA1 SHA512 SSDEEP TLSH

          fedyoazo.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (88e2de44f57dd79d)\fedyoazo.newcfg
          • Size 683B
          • SHA256 459b43df132f163aca6a104bd2de6a56872854acbc6db90d784fd7e463ef1176
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (88e2de44f57dd79d)\user.config
          • Size 520B
          • SHA256 e3daa285e4876b35163d1e1327fb87f8b56e6c97f2b1c9078e9c72396675b072
          • MD5 SHA1 SHA512 TLSH

          v3mx4vqf.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (88e2de44f57dd79d)\v3mx4vqf.newcfg
          • Size 882B
          • SHA256 e72c1c5b5fc98f6dda83fe335ad9c43cc55b21b84556994999495e7499747ec3
          • MD5 SHA1 SHA512 TLSH

          {da6eb545-9a7b-42d9-ad9f-4a9a581231ef}_OnDiskSnapshotProp

          • Path \??\Volume{e35b4427-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{da6eb545-9a7b-42d9-ad9f-4a9a581231ef}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 b44467b9d04345233602fe002270c78bb3d4e3435b753f29b3bf0219e5ef89b8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/592-141-0x0000000001480000-0x00000000014B0000-memory.dmp

          memory/592-164-0x0000000003D10000-0x0000000003D60000-memory.dmp

          memory/592-147-0x0000000003AB0000-0x0000000003C0A000-memory.dmp

          memory/592-183-0x0000000004070000-0x000000000410E000-memory.dmp

          memory/592-184-0x0000000004110000-0x00000000041A2000-memory.dmp

          memory/592-186-0x0000000003D60000-0x0000000003DA1000-memory.dmp

          memory/592-155-0x0000000003DF0000-0x0000000003FD0000-memory.dmp

          memory/592-188-0x0000000004300000-0x00000000043D6000-memory.dmp

          memory/3168-214-0x0000000002700000-0x0000000002741000-memory.dmp

          memory/3168-211-0x000000001BBE0000-0x000000001BDC0000-memory.dmp

          memory/3168-212-0x000000001BDC0000-0x000000001BF48000-memory.dmp

          memory/3168-213-0x0000000002780000-0x00000000027B0000-memory.dmp

          memory/3168-209-0x000000001B2A0000-0x000000001B33E000-memory.dmp

          memory/3168-208-0x00000000004E0000-0x0000000000676000-memory.dmp

          memory/3168-210-0x000000001B8A0000-0x000000001B9FA000-memory.dmp

          memory/4984-64-0x0000000005540000-0x00000000055A8000-memory.dmp

          memory/5172-34-0x0000000006B40000-0x00000000070FA000-memory.dmp

          memory/5172-21-0x0000000003E60000-0x0000000003E8E000-memory.dmp

          memory/5172-25-0x0000000003EA0000-0x0000000003EAC000-memory.dmp

          memory/5172-29-0x0000000006060000-0x00000000061BA000-memory.dmp

          memory/5172-33-0x00000000063A0000-0x0000000006580000-memory.dmp