Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    28/05/2026, 18:13

General

  • Target
    ScreenConnect.ClientSetup.exe
  • Size 5.4MB
  • Sample260528-wt2drsh19p
  • SHA256 0600f397e12f8eee94623728448eb6a39d3720ca9fed34499715caed8a42f481
  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 15 IoCs
  • Drops file in Windows directory 11 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⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3276
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\25.2.4.9229\4ed5919e09342dc9\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4968
  • 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:5048
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 7AF73D5232B966C0997CB51BF5F74B2F C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4724
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240656875 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3284
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3448
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding B608A7E4A94094CDB3198FDE3105974F
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3724
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2424

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e585494.rbs

          • Path C:\Config.Msi\e585494.rbs
          • Size 10KB
          • SHA256 b0a0d33496be7d7af308d666d1a81114389c45f1637f8f10872c60366645b2f8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI21AC.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI21AC.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 da29455a64858fda773319c32c0a6cd40edbe8042ed005aa2befb8a4f0fb0522
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientSetup.msi

          • Path C:\Users\Admin\AppData\Local\Temp\ScreenConnect\25.2.4.9229\4ed5919e09342dc9\ScreenConnect.ClientSetup.msi
          • Size 9.5MB
          • SHA256 6fa8a482052e9d048c7c6f3baf697a86bce14c251dda5b1642f85c3aaa3987a7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI55AE.tmp

          • Path C:\Windows\Installer\MSI55AE.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.1MB
          • SHA256 d746e09958860eda46d653c985d16ee6c69eee243ca842e62948e7ea4bcd07ee
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {7ca1f741-9050-4713-94e6-51258404c109}_OnDiskSnapshotProp

          • Path \??\Volume{cd0aa2ae-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{7ca1f741-9050-4713-94e6-51258404c109}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 9dfa1069538f9b6b54ebd70f21f30f29784adcae27bc369482022e63d513f434
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/3276-5-0x0000000002DE0000-0x0000000002E02000-memory.dmp

          memory/3276-8-0x0000000005330000-0x0000000005340000-memory.dmp

          memory/3276-7-0x0000000005EE0000-0x0000000006484000-memory.dmp

          memory/3276-6-0x00000000053D0000-0x000000000557C000-memory.dmp

          memory/3276-0-0x0000000005330000-0x0000000005340000-memory.dmp

          memory/3276-4-0x0000000005340000-0x00000000053CC000-memory.dmp

          memory/3276-3-0x0000000005640000-0x0000000005932000-memory.dmp

          memory/3276-2-0x0000000005330000-0x0000000005340000-memory.dmp

          memory/3276-1-0x0000000001400000-0x0000000001408000-memory.dmp

          memory/3284-30-0x0000000003200000-0x000000000322E000-memory.dmp

          memory/3284-34-0x0000000003240000-0x000000000324A000-memory.dmp

          memory/3284-38-0x00000000032F0000-0x000000000337C000-memory.dmp

          memory/3284-42-0x0000000005900000-0x0000000005AAC000-memory.dmp