Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    19/04/2026, 12:14

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 9.7MB
  • Sample260419-pd98eaex8t
  • SHA256 38e1ab2a0a1221bd7aa0c13e048892c7d2e136139781df413449744d1069be31
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 5 IoCs

    Network request originating from process or tool commonly abused by malware.

  • 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.

  • 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 42 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 16 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 7 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 7 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of WriteProcessMemory 9 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⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3676
  • 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:5492
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 4D555050D60A7C4611CA0D342FDA8A0A C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1788
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240670328 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:892
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5967.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240671156 10 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5288
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI51C2.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240734765 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5500
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1288
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding C4864CAE670B8E68018C605D1F9B97CF
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4480
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding EB6E281FEDBC0BB552B961F1207E6AC0 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:4920
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1008
    • C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-ylhn1j-relay.screenconnect.com&p=443&s=59b18aeb-4d5a-4809-97d1-55d5dc15e4d8&k=BgIAAACkAABSU0ExAAgAAAEAAQBlagZRTQ8c2fYSucLzh40CKvBQp%2fgvTzRXA%2bj6Yzp4CWIok5V46S2PWU1HYPiGxo8mcjihpnxUdZye%2fN5kS9db8JN5keDw%2bLYaT%2b%2bv8y6E06WraHoq1LIAgJTPu4Y%2bYtOsYmRpxlaC1U5zl0jhUBFSpZ%2bGLWrteKH10CMXwSe9g23ptRRqa%2bJvp8SLenpYpeBgTsB1ZdB%2fpy0RMw%2bXU9FbidL%2blm%2ba1jWoK7vPpPka2v8pmQS%2fR2revXfCOFw3%2bn5af%2fbtj0fQHspgzXQkU4ZPflZI3NSmM4sTPImG7GDs%2bNvz6taWYvvLy2f32aH1J4vRPBN2y5UB8qp6ieEiZ4LU"
      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:1372
      • C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsClient.exe" "RunRole" "fced6ac5-b020-40eb-96da-041bb526eeaa" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:4696
      • C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsClient.exe" "RunRole" "0e9feeaa-4c9a-4a2f-992c-225ddc1118d8" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:4128

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e598515.rbs

          • Path C:\Config.Msi\e598515.rbs
          • Size 214KB
          • SHA256 9fd2e147e7f6d0b6cd23983a3ad7fa50d9fc0503d212aceabf51e13bb82e928c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\Client.en-US.resources
          • Size 64KB
          • SHA256 efdb0b4fcc38b52cbf72336bd107a814db8454003f3495de21e2026a148823ea
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\Client.resources
          • Size 6KB
          • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.Client.dll
          • Size 411KB
          • SHA256 28ff8468ad2db8b41fe9d9a2971dd56fea0aecad14808fe4b31c9b1072d3b129
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.ClientService.dll
          • Size 90KB
          • SHA256 9cf2c77df0a1a1e854ec1bbc6940d96f508bfb4b0555a07657c77314803a717e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 01341bd42426c3d110136cc94433df00dbad690a56593f7cca41a93f698f214a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.Core.dll
          • Size 572KB
          • SHA256 92e831159d5e9f2676241ab7ce80060a0b1dc34684f83797aec93b3ecff41139
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 2292aac48ad575c6d1ed99c862e3408e254db34b8fea50cf3594aa08f3e875d0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 838KB
          • SHA256 3fa1fe4a588015cc94eceb06867f16a5e562293139fbf6b36bde21dba478968d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (8629aa88d043b311)\system.config
          • Size 978B
          • SHA256 068c38976dffe4bfc4d5485184b9d0f33c7ebf9a0759ae4f542552b4b3ab3a2d
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 d2c44e0cbcc40cc390e6ace62ab487ed957ab578719fdb0c7103220d7448a7aa
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 15586243f5308e49e6ee76fd250b18ba11707d49a93f45e4fc15f6fcdab18f3d
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 1408df58268ef7be979e1005e6751444322c54c1b237cd2f75bc1e4422ebeeb2
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 d37094eafa913e3446f7fa6b8f5e4b8d179820f9ffaf47cecf06fa92988981df
          • MD5 SHA1 SHA512 TLSH

          rundll32.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\rundll32.exe.log
          • Size 746B
          • SHA256 76ced2c52d647683572ceac0687933e96e198b5a6f998457fa334763cc1ef978
          • MD5 SHA1 SHA512 TLSH

          MSI55DB.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp
          • Size 1.1MB
          • SHA256 cd6bccce073b2a5205840ec31c91df0d443cc57c68756de2c03e21db8e3fc157
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp-\ScreenConnect.Core.dll
          • Size 562KB
          • SHA256 c51a2b5cb5054ec0136e332bf290c8af3392d7936b5137a07423df08ab33d264
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 432abf3a198ff64fb2c660eb06b2bb33a16cf69fd28d836cfcb65c43d37dc462
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI55DB.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 10933424536d53e397f651915f862c933199c50722943c236b020787b2e8f147
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5967.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5967.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 528242c7745783b3b4ae72fec13bb9bd49b17b0e00f60c027351147f21fdd359
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI8738.tmp

          • Path C:\Windows\Installer\MSI8738.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e598514.msi

          • Path C:\Windows\Installer\e598514.msi
          • Size 9.7MB
          • SHA256 38e1ab2a0a1221bd7aa0c13e048892c7d2e136139781df413449744d1069be31
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/892-33-0x0000000005770000-0x000000000577C000-memory.dmp

          memory/892-29-0x00000000057A0000-0x00000000057CE000-memory.dmp

          memory/892-48-0x0000000002C20000-0x0000000002EAB000-memory.dmp

          memory/892-37-0x0000000005870000-0x0000000005904000-memory.dmp

          memory/892-42-0x0000000006220000-0x00000000067C6000-memory.dmp

          memory/892-41-0x0000000005AC0000-0x0000000005C70000-memory.dmp

          memory/1372-234-0x0000000004750000-0x000000000484E000-memory.dmp

          memory/1372-185-0x0000000004610000-0x00000000046A4000-memory.dmp

          memory/1372-189-0x0000000004860000-0x0000000004A10000-memory.dmp

          memory/1372-179-0x0000000001E80000-0x0000000001E9A000-memory.dmp

          memory/1372-200-0x0000000004D80000-0x0000000004E55000-memory.dmp

          memory/1372-198-0x00000000046C0000-0x0000000004701000-memory.dmp

          memory/1372-196-0x0000000004B90000-0x0000000004C22000-memory.dmp

          memory/1372-191-0x0000000004700000-0x0000000004750000-memory.dmp

          memory/1372-233-0x0000000001D50000-0x0000000001D69000-memory.dmp

          memory/1372-195-0x0000000004A80000-0x0000000004AEA000-memory.dmp

          memory/1788-138-0x0000000002D80000-0x000000000300B000-memory.dmp

          memory/1788-221-0x0000000002D80000-0x000000000300B000-memory.dmp

          memory/1788-81-0x0000000002D80000-0x000000000300B000-memory.dmp

          memory/3676-80-0x000001AD34330000-0x000001AD3433C000-memory.dmp

          memory/3676-224-0x000001AD34330000-0x000001AD3433C000-memory.dmp

          memory/4128-232-0x0000000000A80000-0x0000000000A8C000-memory.dmp

          memory/4128-229-0x0000000000C30000-0x0000000000C71000-memory.dmp

          memory/4480-222-0x00000000028F0000-0x0000000002B7B000-memory.dmp

          memory/4696-226-0x0000000000E70000-0x0000000000E8A000-memory.dmp

          memory/4696-225-0x000000001BA20000-0x000000001BBA8000-memory.dmp

          memory/4696-216-0x0000000000480000-0x000000000052A000-memory.dmp

          memory/4696-219-0x000000001B520000-0x000000001B5B4000-memory.dmp

          memory/4696-228-0x00000000028B0000-0x00000000028F1000-memory.dmp

          memory/4696-227-0x0000000000EB0000-0x0000000000ECA000-memory.dmp

          memory/4696-235-0x0000000000C10000-0x0000000000C1C000-memory.dmp

          memory/4696-217-0x000000001B0C0000-0x000000001B12A000-memory.dmp

          memory/4696-220-0x000000001B870000-0x000000001BA20000-memory.dmp

          memory/4920-223-0x00000000025F0000-0x000000000287B000-memory.dmp

          memory/5288-75-0x0000000002C20000-0x0000000002C48000-memory.dmp

          memory/5288-103-0x00000000024D0000-0x000000000275B000-memory.dmp

          memory/5288-82-0x00000000024D0000-0x000000000275B000-memory.dmp

          memory/5492-230-0x0000024A017D0000-0x0000024A017DC000-memory.dmp

          memory/5500-136-0x00000000025E0000-0x000000000286B000-memory.dmp