Analysis

  • max time kernel
    149s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    20/08/2026, 18:13

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 13.9MB
  • Sample260820-wtyymsgp8x
  • SHA256 9a6a2a3a88cde3da3256143d6094219a252adae010ad19886119a4fd82a663bc
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 3 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 10 IoCs
  • Drops file in Program Files directory 18 IoCs
  • Drops file in Windows directory 13 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:2168
  • 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:4864
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding B580C2FA8E9C912214DB042245A85CE3 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1044
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240681125 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4988
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI8394.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240681890 11 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:4176
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI89CE.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240683484 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:452
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1804
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 02A3A9DC383496CAD5E38C48E89F919C
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1856
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding D7358D7EBC74D8DEB8CA6982E91CC305 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:2156
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2568
    • C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-coavq0-relay.screenconnect.com&p=443&s=3e7b2c2b-a301-4cb0-b59a-9ecfed6e3602&k=BgIAAACkAABSU0ExAAgAAAEAAQCBO9tPvg5qPurW6qEvp9bUmW9mYzEm7o6yAFHTWSiFpJUPxyd86wxZabgPwagG7A6%2fXKMmY0E1n%2boZQO9a7xuH9q5G2JGTdmiFAM0w%2f7km1A%2b2nB6dNxYxc77fGCOp2OMgPv%2bFuFtWrvzeCyA7RzqeBVPJtzohXZk7kmhY2I01AwWEzFkHCexhIxD9AVRLThFZhImG%2bylaxX9ORTvzfvFaTxVCRnMte9pCKtjtTTw8M6jMBV17r4SXYpS0KUpcksBoo%2bozl1Jcq3eOEh34SUskDA29Qxg%2fF%2fBjBkLmO%2b99bBzOP0S1dWcjhJSaB7nffgZS951U4%2fC1FlYivi4oU2vh&c=Eye%20Clinic&c=&c=Surgery&c=Personal&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:4668
      • C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsClient.exe" "RunRole" "ef7f713d-ec24-4fd9-b4a1-40b2842d2450" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:900
      • C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsClient.exe" "RunRole" "96becd86-9e48-4227-a1ae-8b3ad365e05e" "System"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:2544

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e58c262.rbs

          • Path C:\Config.Msi\e58c262.rbs
          • Size 214KB
          • SHA256 36866558635f4f66d3f7ab94645c7b536bb7bf6fb6ec5b7bacd09c6a6c62a230
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Client.Override.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\Client.Override.en-US.resources
          • Size 256B
          • SHA256 28b9226583d81800feaa9909bd0b0bf8a44bcbd97e66246c1d17162582fd46b3
          • MD5 SHA1 SHA512 TLSH

          Client.en-US.resources

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\Client.en-US.resources
          • Size 64KB
          • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Client.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.Client.dll
          • Size 412KB
          • SHA256 4010ea184982e71ad71e76b43266488c954f665324b89ef042cea9e463a60c9d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.ClientService.dll
          • Size 91KB
          • SHA256 6e6aa42b107d3e82b7b7dc18a75eee3f09e9f268788c0a7edbbc617152adf178
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.ClientService.exe

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.ClientService.exe
          • Size 93KB
          • SHA256 a94ecccb5b88e3860d619fbb3b87ff4af6448240ab65b89d610f348d75e793f2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.Core.dll
          • Size 577KB
          • SHA256 eedbd9ba4755f238af397c71b575082e18a31eabacc22abb4949f92fe991e169
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 305663a05c77c8058569a976db740aa2f20b66583f0381059633b628376570fc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsAuthenticationPackage.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsAuthenticationPackage.dll
          • Size 254KB
          • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.WindowsCredentialProvider.dll

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\ScreenConnect.WindowsCredentialProvider.dll
          • Size 837KB
          • SHA256 ce75ee1188726b49d46477166faac6f8715ca1aa4afc5b8a687fcbfcd541c0c2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          app.config

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\app.config
          • Size 1KB
          • SHA256 153a4b7722eae4a903301c18977dc8a803ca2c28464a0a25adba687c62f194d7
          • MD5 SHA1 SHA512 TLSH

          system.config

          • Path C:\Program Files (x86)\ScreenConnect Client (a25d630ec868238a)\system.config
          • Size 966B
          • SHA256 ed4ff0cac6b33b29810e91bc1cc07f41c37f5ec7eae787f70d9237477dbb8412
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 727B
          • SHA256 cfa2b83cca49e8ef72ba8846bb55176996bd8b8c1aadab08ee5652b18dc0823f
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 b6a13789ac65a7fe4182859bde8feab8ac1ea0f0c7c020f0f7cff75a620d7661
          • MD5 SHA1 SHA512 TLSH

          8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_59E89BCE9615F2B61F2F2C691688F111
          • Size 404B
          • SHA256 c71beeadad6ede1c846f2386aaf4ad0766b976ce3ed65422ef2759980092c563
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 cd5bc2a6116ef01655fbf3277680e211dab042213b065007d089e1a64c669242
          • 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 ddebb6b1094dbef9e96754a74ebd4761d857864c9bd0b5f20a97259a6d7c8fe0
          • MD5 SHA1 SHA512 TLSH

          MSI7FBA.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp
          • Size 1.1MB
          • SHA256 18bacfd2a7c95800b6279cb8731bf03c8bbb526f5bc3790254a8e06d7ceee8ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp-\ScreenConnect.Core.dll
          • Size 567KB
          • SHA256 15fec18d3a8990cdb540897ede61227353165668048c001164fcd22233cc8390
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 c1142cc3ae09a7d3b5392539c29cbeb585543a38c93e37e55d82cbe0bb56d588
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI7FBA.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 ae3005e1ca932eccde09c479fde2ecf8ea2feeb908dec4f0c830eab671276454
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8394.tmp-\CustomAction.config
          • Size 234B
          • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
          • MD5 SHA1 SHA512 TLSH

          ScreenConnect.WindowsInstaller.dll

          • Path C:\Users\Admin\AppData\Local\Temp\MSI8394.tmp-\ScreenConnect.WindowsInstaller.dll
          • Size 137KB
          • SHA256 7c27380976a5befc5a947e129eb464123f46d06cf0eb7f984ced921f36e1d0e7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIC3D9.tmp

          • Path C:\Windows\Installer\MSIC3D9.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e58c261.msi

          • Path C:\Windows\Installer\e58c261.msi
          • Size 13.9MB
          • SHA256 9a6a2a3a88cde3da3256143d6094219a252adae010ad19886119a4fd82a663bc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (a25d630ec868238a)\user.config
          • Size 520B
          • SHA256 5750f2579c122d27f36df6c418ee0a4904ab2bd0116b3c9686d06f395f07fafc
          • MD5 SHA1 SHA512 TLSH

          user.config

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (a25d630ec868238a)\user.config
          • Size 683B
          • SHA256 5e2081e2dcac13454949600b9199b5715d8024413b656207e1a74e0cd2c52c79
          • MD5 SHA1 SHA512 TLSH

          ycnlbdbh.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (a25d630ec868238a)\ycnlbdbh.newcfg
          • Size 883B
          • SHA256 312306edd304cfc7891521e6731adb61b2714bf5bf6f854f4801e65ca01206ba
          • MD5 SHA1 SHA512 TLSH

          memory/900-221-0x000000001B3A0000-0x000000001B434000-memory.dmp

          memory/900-222-0x000000001B940000-0x000000001BAF0000-memory.dmp

          memory/900-225-0x000000001CD30000-0x000000001CEB6000-memory.dmp

          memory/900-219-0x00000000006D0000-0x000000000077E000-memory.dmp

          memory/900-220-0x000000001B330000-0x000000001B39C000-memory.dmp

          memory/900-224-0x0000000000F30000-0x0000000000F4A000-memory.dmp

          memory/4176-74-0x00000000050C0000-0x00000000050E8000-memory.dmp

          memory/4668-188-0x0000000004A20000-0x0000000004AB2000-memory.dmp

          memory/4668-190-0x0000000004760000-0x00000000047A1000-memory.dmp

          memory/4668-192-0x0000000004C00000-0x0000000004CD6000-memory.dmp

          memory/4668-187-0x00000000049B0000-0x0000000004A1C000-memory.dmp

          memory/4668-170-0x0000000004710000-0x0000000004760000-memory.dmp

          memory/4668-163-0x00000000045B0000-0x0000000004644000-memory.dmp

          memory/4668-167-0x0000000004800000-0x00000000049B0000-memory.dmp

          memory/4668-157-0x0000000001E50000-0x0000000001E6A000-memory.dmp

          memory/4988-42-0x00000000056B0000-0x0000000005C54000-memory.dmp

          memory/4988-41-0x0000000004F50000-0x0000000005100000-memory.dmp

          memory/4988-37-0x0000000002930000-0x00000000029C4000-memory.dmp

          memory/4988-33-0x00000000027F0000-0x00000000027FC000-memory.dmp

          memory/4988-29-0x00000000027B0000-0x00000000027DE000-memory.dmp