Analysis

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

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    11/05/2026, 12:13

General

  • Target
    ScreenConnect.ClientSetup.exe
  • Size 5.5MB
  • Sample260511-pdtwescw4l
  • SHA256 5a5fcb68bc9955698ede325d9b13cad4d7c3cd78b328373994910ccc99fc0777
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Signed with revoked ConnectWise certificate 1 IoCs

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

  • Loads dropped DLL 11 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 17 IoCs
  • Drops file in Windows directory 15 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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.

  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 32 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 5 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.ClientSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\ScreenConnect.ClientSetup.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:484
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\24.3.7.9067\2439ff59bf8ed0fa\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3280
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • 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:4948
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 712264D546F1B0B0D1B342B99224F713 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240660796 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1512
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1116
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 6D8524198D297557E76DB7721E8D68B2
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1836
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3924

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e585e1a.rbs

          • Path C:\Config.Msi\e585e1a.rbs
          • Size 10KB
          • SHA256 1b70f5d6401f3844b72ee4b938e20eea1a1d8a7ca61e767e0ee6b423bc2e872b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI311D.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp
          • Size 1.0MB
          • SHA256 0918d8ab2237368a5cec8ce99261fb07a1a1beeda20464c0f91af0fe3349636b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp-\ScreenConnect.Core.dll
          • Size 536KB
          • SHA256 a2e9752de49d18e885cbd61b29905983d44b4bc0379a244bfabdaa3188c01f0a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 d727a640723d192aa3ece213a173381682041cb28d8bd71781524dbae3ddbf62
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI311D.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 84a09ed81afc5ff9a17f81763c044c82a2d9e26f852de528112153ee9ab041d0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\24.3.7.9067\2439ff59bf8ed0fa\ScreenConnect.ClientSetup.msi
          • Size 13.1MB
          • SHA256 7ddf9ea16c79d3706a3bd6941d7e5214681594a00cf5db98b99dd15b9545373a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI5F81.tmp

          • Path C:\Windows\Installer\MSI5F81.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 d8e2e6ef4d319fb7dc8b622902e0dd3cd2c2d471b7709296587a3960d22e6e3b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {6dab9c5e-0638-4702-9c26-1cf31ed6c153}_OnDiskSnapshotProp

          • Path \??\Volume{a37a13d3-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{6dab9c5e-0638-4702-9c26-1cf31ed6c153}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 161214f6b52151a5587ce888ccd218025659bc3415d02957982de4f2e902cd27
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/484-6-0x0000000002E20000-0x0000000002E42000-memory.dmp

          memory/484-4-0x00000000057E0000-0x0000000005AD0000-memory.dmp

          memory/484-9-0x00000000054D0000-0x00000000054E0000-memory.dmp

          memory/484-8-0x0000000006080000-0x0000000006626000-memory.dmp

          memory/484-12-0x000000000A6E0000-0x000000000A7A1000-memory.dmp

          memory/484-7-0x00000000054E0000-0x000000000568A000-memory.dmp

          memory/484-1-0x0000000001500000-0x0000000001508000-memory.dmp

          memory/484-0-0x00000000054D0000-0x00000000054E0000-memory.dmp

          memory/484-2-0x00000000054D0000-0x00000000054E0000-memory.dmp

          memory/484-5-0x00000000053E0000-0x000000000546C000-memory.dmp

          memory/484-3-0x00000000054D0000-0x00000000054E0000-memory.dmp

          memory/1512-32-0x0000000005000000-0x000000000502E000-memory.dmp

          memory/1512-44-0x0000000005300000-0x00000000054AA000-memory.dmp

          memory/1512-40-0x00000000050C0000-0x000000000514C000-memory.dmp

          memory/1512-36-0x0000000004FE0000-0x0000000004FEA000-memory.dmp