Analysis

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

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    01/06/2026, 12:16

General

  • Target
    ScreenConnect.ClientSetup.exe
  • Size 5.4MB
  • Sample260601-pfgzmsc19q
  • SHA256 465d1febf4a78289be81fe2b0c2c792d4a9f487279c9001c471934d6b37defec
  • 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 17 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:2092
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\25.2.4.9229\6a76edc7da9162fd\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4840
  • 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:3508
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding FBA6CCDF205749B5F234E0211107D972 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2400
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI4FC1.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240668750 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1596
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2796
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 6849AA05E56523C32E41FEAA3BCF270A
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2816
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4704

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e58975a.rbs

          • Path C:\Config.Msi\e58975a.rbs
          • Size 10KB
          • SHA256 56dfbbc93a70b6e950d13451d555cd7b220950be9d5a738ca7962d52d2b5b605
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI4FC1.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4FC1.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4FC1.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4FC1.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4FC1.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI4FC1.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\6a76edc7da9162fd\ScreenConnect.ClientSetup.msi
          • Size 12.8MB
          • SHA256 a2508c2f9924fc292f9e33971d32a7d7b58da30a15f783df9653fdbeb3d6bf53
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI98D1.tmp

          • Path C:\Windows\Installer\MSI98D1.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 0b09947a44f9c462f0a77f42739776912c1c348c955e789a09d54b27ecd7087e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {6aa44d24-46c4-47e3-aed6-98bd331936d4}_OnDiskSnapshotProp

          • Path \??\Volume{d78106ee-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{6aa44d24-46c4-47e3-aed6-98bd331936d4}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 bcdf7fee3692951447c9fed4e45bc71f8fe4c53246979916cf8b465272b0556f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1596-38-0x0000000004BD0000-0x0000000004C5C000-memory.dmp

          memory/1596-30-0x0000000004AF0000-0x0000000004B1E000-memory.dmp

          memory/1596-34-0x0000000004B30000-0x0000000004B3A000-memory.dmp

          memory/1596-42-0x0000000004E50000-0x0000000004FFC000-memory.dmp

          memory/2092-8-0x0000000005700000-0x0000000005710000-memory.dmp

          memory/2092-7-0x00000000062B0000-0x0000000006854000-memory.dmp

          memory/2092-0-0x0000000005700000-0x0000000005710000-memory.dmp

          memory/2092-6-0x0000000005810000-0x00000000059BC000-memory.dmp

          memory/2092-5-0x00000000056C0000-0x00000000056E2000-memory.dmp

          memory/2092-4-0x0000000005780000-0x000000000580C000-memory.dmp

          memory/2092-3-0x0000000005A10000-0x0000000005D02000-memory.dmp

          memory/2092-2-0x0000000005700000-0x0000000005710000-memory.dmp

          memory/2092-1-0x00000000019A0000-0x00000000019A8000-memory.dmp