Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    23/07/2026, 00:15

General

  • Target
    ScreenConnect.ClientSetup.msi
  • Size 9.8MB
  • Sample260723-ajvycaeb66
  • SHA256 50a8e2671f37ae9e4e8be32e082348caefac168668cc37605e34bb2947b116a9
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 2 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 50 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 9 IoCs
  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 17 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 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 8 IoCs
  • Modifies registry class 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 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\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
    • Suspicious use of SetWindowsHookEx
    PID:4336
  • 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:616
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 9256BA7BF72A8D7318734C6041F5A255 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3052
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240734937 1 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5672
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI56A3.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240735937 11 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiMotw
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5816
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\MSI5D3B.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240737625 18 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.CheckMsiFileName
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5956
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:460
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 60B6A89E550883CDEA0F12E93D8A5043
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4516
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 06482D3AB6A93FAEC07BD9EBD0A50828 E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:1244
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:3484
    • C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-ujpohk-relay.screenconnect.com&p=443&s=12c78a39-287c-494a-9a5f-e88c6f968c11&k=BgIAAACkAABSU0ExAAgAAAEAAQDF8r0fLD9z0AorbqML7i1LThZ4O8M6J8C3InwTJPu5Ln2C10PkTAzPfzdcCzeWljqP6PmkPm9qneQMD0RfAHqQ91f6s6qvhHw9h5AtO4fYZIbI7bAXbbtFpbBLyfdobW1Mt0B3MDvR3ymRIgQBMTx2fwTwPMhU6apaIhGqmdfwEqflxxbsmGNuOftNh8ZKkgAju2CX5K31ysmxYsNKPbzZKXyOga798DKodXbxsAUOrETZvDXEZfAiqBxnjmNdxXbUhlf9QHGkof4NAUUiMHNFesfb3bvQi5j7p82echm98oRPVDP1Ga1Yix8Fuv4JrfuL4PKtPODvTHHECVuWlRPT&c=ato&c=ATO0GO&c=&c=&c=&c=&c=&c="
      1⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:5904
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 5904 -s 1336
        2⤵
        • Program crash
        PID:3064
    • C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.exe
      "C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-ujpohk-relay.screenconnect.com&p=443&s=12c78a39-287c-494a-9a5f-e88c6f968c11&k=BgIAAACkAABSU0ExAAgAAAEAAQDF8r0%2fLD9z0Aor%2bqML7i1LThZ4O8M6J8C3InwTJPu5Ln2C10PkTAzP%2fzdcCzeWljqP6PmkPm9qneQMD0R%2fAHqQ91%2f6s6qvhHw9h5AtO4fYZI%2bI7bAXb%2btFpbBLy%2fdobW1Mt0B3MDvR3ymRIgQBMTx2fwTwPMhU6apaIhGqmd%2fwEqflxxbsmGNuO%2ftNh8ZKkgAju2CX5K31ysmxYsNKPbzZKXyOga798DKodX%2bxsAUOrETZvDXEZfAiqBxnjmNdxXbUhlf9QHGko%2f4NAUUiMHNFesf%2b3bvQi5j7p82echm98oRPVDP1Ga1Yix8Fuv4JrfuL4PKtPODvTHHECVuWlRPT&c=ato&c=ATO%20GO&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:1432
      • C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.WindowsClient.exe" "RunRole" "c2699ad1-8663-4b80-b979-b5b75ff5aaf8" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:4408
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5904 -ip 5904
      1⤵
        PID:4648

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            e59b369.rbs

            • Path C:\Config.Msi\e59b369.rbs
            • Size 214KB
            • SHA256 56468f5790d61859fe9f2c552f960ed4175d51d7a9910987c7b3389853854053
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.Client.dll

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.Client.dll
            • Size 412KB
            • SHA256 4010ea184982e71ad71e76b43266488c954f665324b89ef042cea9e463a60c9d
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.ClientService.dll

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.dll
            • Size 91KB
            • SHA256 6e6aa42b107d3e82b7b7dc18a75eee3f09e9f268788c0a7edbbc617152adf178
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.ClientService.exe

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.ClientService.exe
            • Size 93KB
            • SHA256 a94ecccb5b88e3860d619fbb3b87ff4af6448240ab65b89d610f348d75e793f2
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.Core.dll

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.Core.dll
            • Size 577KB
            • SHA256 eedbd9ba4755f238af397c71b575082e18a31eabacc22abb4949f92fe991e169
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.Windows.dll

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.Windows.dll
            • Size 1.7MB
            • SHA256 305663a05c77c8058569a976db740aa2f20b66583f0381059633b628376570fc
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.WindowsAuthenticationPackage.dll

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\ScreenConnect.WindowsAuthenticationPackage.dll
            • Size 254KB
            • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
            • MD5 SHA1 SHA512 SSDEEP TLSH

            system.config

            • Path C:\Program Files (x86)\ScreenConnect Client (2d061b84bcbdb211)\system.config
            • Size 970B
            • SHA256 c8888f572582139b1434312341fd1f974d9666f10bd9939553c6f306d1b31074
            • MD5 SHA1 SHA512 TLSH

            MSI5181.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp
            • Size 1.1MB
            • SHA256 18bacfd2a7c95800b6279cb8731bf03c8bbb526f5bc3790254a8e06d7ceee8ad
            • MD5 SHA1 SHA512 SSDEEP TLSH

            Microsoft.Deployment.WindowsInstaller.dll

            • Path C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp-\Microsoft.Deployment.WindowsInstaller.dll
            • Size 172KB
            • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.Core.dll

            • Path C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp-\ScreenConnect.Core.dll
            • Size 567KB
            • SHA256 15fec18d3a8990cdb540897ede61227353165668048c001164fcd22233cc8390
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.InstallerActions.dll

            • Path C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp-\ScreenConnect.InstallerActions.dll
            • Size 24KB
            • SHA256 c1142cc3ae09a7d3b5392539c29cbeb585543a38c93e37e55d82cbe0bb56d588
            • MD5 SHA1 SHA512 SSDEEP TLSH

            ScreenConnect.Windows.dll

            • Path C:\Users\Admin\AppData\Local\Temp\MSI5181.tmp-\ScreenConnect.Windows.dll
            • Size 1.7MB
            • SHA256 ae3005e1ca932eccde09c479fde2ecf8ea2feeb908dec4f0c830eab671276454
            • MD5 SHA1 SHA512 SSDEEP TLSH

            CustomAction.config

            • Path C:\Users\Admin\AppData\Local\Temp\MSI56A3.tmp-\CustomAction.config
            • Size 234B
            • SHA256 7027b69ab6ebc9f3f7d2f6c800793fde2a057b76010d8cfd831cf440371b2b23
            • MD5 SHA1 SHA512 TLSH

            ScreenConnect.WindowsInstaller.dll

            • Path C:\Users\Admin\AppData\Local\Temp\MSI56A3.tmp-\ScreenConnect.WindowsInstaller.dll
            • Size 137KB
            • SHA256 7c27380976a5befc5a947e129eb464123f46d06cf0eb7f984ced921f36e1d0e7
            • MD5 SHA1 SHA512 SSDEEP TLSH

            MSIBA3F.tmp

            • Path C:\Windows\Installer\MSIBA3F.tmp
            • Size 202KB
            • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
            • MD5 SHA1 SHA512 SSDEEP TLSH

            e59b368.msi

            • Path C:\Windows\Installer\e59b368.msi
            • Size 9.8MB
            • SHA256 50a8e2671f37ae9e4e8be32e082348caefac168668cc37605e34bb2947b116a9
            • MD5 SHA1 SHA512 SSDEEP TLSH

            3io4bvue.newcfg

            • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (2d061b84bcbdb211)\3io4bvue.newcfg
            • Size 883B
            • SHA256 8a65bc27419d7eba286ce5ff06e2d76329cd2f6b7ee524b5d5e518ea273558bb
            • MD5 SHA1 SHA512 TLSH

            nhzobyel.newcfg

            • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (2d061b84bcbdb211)\nhzobyel.newcfg
            • Size 683B
            • SHA256 a12458ecbb24496eb660c41f3d075b937f5522130bf037744971a0fedeeea059
            • MD5 SHA1 SHA512 TLSH

            user.config

            • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (2d061b84bcbdb211)\user.config
            • Size 520B
            • SHA256 b0321654f2e0940c7293ce0d8c0fc1f2c28a89446899f194b43e78d41f25eab9
            • MD5 SHA1 SHA512 TLSH

            memory/1432-196-0x0000000004920000-0x00000000049F6000-memory.dmp

            memory/1432-195-0x0000000004340000-0x0000000004381000-memory.dmp

            memory/1432-193-0x0000000004730000-0x00000000047C2000-memory.dmp

            memory/1432-192-0x0000000004440000-0x00000000044AC000-memory.dmp

            memory/1432-173-0x0000000004380000-0x00000000043D0000-memory.dmp

            memory/4408-211-0x000000001B2A0000-0x000000001B30C000-memory.dmp

            memory/4408-214-0x0000000001180000-0x000000000119A000-memory.dmp

            memory/4408-216-0x00000000027C0000-0x0000000002801000-memory.dmp

            memory/4408-209-0x00000000005C0000-0x000000000066E000-memory.dmp

            memory/4408-215-0x000000001BCD0000-0x000000001BE58000-memory.dmp

            memory/4408-212-0x000000001B740000-0x000000001B7D4000-memory.dmp

            memory/4408-213-0x000000001B990000-0x000000001BB40000-memory.dmp

            memory/5672-34-0x00000000069E0000-0x0000000006F9A000-memory.dmp

            memory/5672-21-0x0000000005F50000-0x0000000005F7E000-memory.dmp

            memory/5672-33-0x0000000006270000-0x0000000006420000-memory.dmp

            memory/5672-25-0x0000000005F30000-0x0000000005F3C000-memory.dmp

            memory/5672-29-0x0000000006020000-0x00000000060B4000-memory.dmp

            memory/5816-64-0x00000000038B0000-0x00000000038D8000-memory.dmp

            memory/5904-157-0x0000000005670000-0x0000000005820000-memory.dmp

            memory/5904-141-0x0000000002C40000-0x0000000002C5A000-memory.dmp

            memory/5904-152-0x0000000005420000-0x00000000054B4000-memory.dmp