UiPath Robot Error - The decryption operation failed, see inner exception

Help Assistant
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1

Hello!

Please help me solve the situation! Sometimes the UiPath Assistant shows a Robot Error.
Error message: The descryption operation failed, see inner exception.
Details: System.ComponentModel.Win32Exception: "The message or signature supplied for verification has benn altered"

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What should be the solution to avoid this appearance altogether?

Thanks in advanced,
János!

2

Hey,
This issue can be related with SSL, TLS or network issue.
I think you should start with this.

3

Try to disable the TLS1.3 and TLS1.0 using the below powershell scripts

function disable-tls-1.3
{
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Server' -Force
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Client' -Force
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Server' -name 'Enabled' -value '0' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Server' -name 'DisabledByDefault' -value '1' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Client' -name 'Enabled' -value '0' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Client' -name 'DisabledByDefault' -value '1' –PropertyType 'DWORD'
    Write-Host 'Disabling TLSv1.3'
}

disable-tls-1.3

function disable-tls-1.0
{
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -Force
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -Force
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -name 'Enabled' -value '0' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -name 'DisabledByDefault' -value '1' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -name 'Enabled' -value '0' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -name 'DisabledByDefault' -value '1' –PropertyType 'DWORD'
    Write-Host 'Disabling TLSv1.0'
}

disable-tls-1.0

Then enable TLS1.2

function enable-tls-1.2
{
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -Force
    New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -Force
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -name 'Enabled' -value '1' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -name 'DisabledByDefault' -value '0' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -name 'Enabled' -value '1' –PropertyType 'DWORD'
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -name 'DisabledByDefault' -value '0' –PropertyType 'DWORD'
    Write-Host 'Enabling TLSv1.2'
}

enable-tls-1.2

To sniff packets using PowerShell you can use the NetEventSession cmdlet (it provides information similar to Netmon or Wireshark):

Run the below command as Administrator:

New-NetEventSession –Name Sniffer –LocalFilePath 'C:\Temp\Sniffer.etl'
Add-NetEventProvider –Name Microsoft-Windows-TCPIP –SessionName Sniffer
Start-NetEventSession –Name Sniffer

After you finish you can stop the session and then convert the etl file to XML or CSV format:

Stop-NetEventSession –Name Sniffer

# Convert to CSV
netsh trace convert 'C:\Temp\Sniffer.etl' overwrite=yes Dump=CSV Report=Yes

image

convert

  Converts a trace file to an HTML report.

  Usage: convert [input=]tracefilename.etl [[output=]filename] 
          [[dump=]CSV|XML|EVTX|TXT|No] [[report=]yes|no]
          [[overwrite=]yes|no] [[tmfpath=]pathname] 

  Parameters: 

    Tag             Value 
    input         - Input ETL trace file 
    output        - Output file name (defaults to input name) 
    dump          - Output format (default = TXT)
    report        - Generates an HTML report (default = no) 
    overwrite     - Overwrites existing files (default = no) 
    tmfpath       - Path to tmf files for decoding WPP traces