How do I get rid of Trojan Virus permanently?

Installing and using a trusted antivirus solution is also one of the top ways to get rid of trojans. An effective antivirus program searches for valid trust and app behavior, as well as trojan signatures in files in order to detect, isolate and then promptly remove them.

Will resetting a PC remove Trojan?

Resetting a PC will remove all programs, settings, and files, including any malware or viruses that may be present . However, it's important to note that resetting your PC should only be done as a last resort, and there are other methods to remove less drastic viruses that won't delete all your data.

Will Windows Defender remove a Trojan?

To make sure that you detect all possible Trojan infections, in addition to at least two virus scanners on a Windows computer, it's also recommended to run a full scan with Windows Defender Offline . This can help to detect and remove particularly stubborn Trojans using the latest threat definitions.

Does a factory reset remove viruses?

A hard reset of your device will generally be effective in removing malware and spyware from your device – but it's not 100% guaranteed to eliminate threats. If a virus has infected your device's recovery partition system files, used to restore factory defaults, then it won't be removed .

How do I get rid of Trojan agent virus?

The best way to clean up a Trojan infection is to use Malwarebytes' free trojan scanner , and then consider Malwarebytes Premium for proactive protection against future Trojan infections. Malwarebytes Premium will initiate a scan for Trojans and then remove Trojans so they can't cause further damage.

How do I stop Trojan virus from popping up?

Closing your browser will likely get rid of the pop-up virus . You may need to force close it if the pop-up is preventing you from closing as normal. To force close on Windows, use Alt + F4. Alternatively, use Control + Alt + Delete, and select Task Manager, choose the relevant application and click End Task.

Can Trojan virus be fake?

The “we have detected a trojan virus" scam is a particularly nasty piece of malware because it's designed to trick you into thinking there is something wrong with your Mac when, in fact, all that's happened is that you've visited a website that's a host to adware.

Firmware replying trojan that uses genuine windows remoting to take over (2024)

Another 4104 Powershell script:

Creating Scriptblock text (2 of 4):

$sb = New-Object System.Text.StringBuilder $textToEscape.Length;
for($i=0; $i -lt $textToEscape.Length; $i++)
{
$curChar = $textToEscape[$i];
if($curChar -eq '\n')
{
$null = $sb.Append("\par");
}
elseif(($curChar -lt 0x20) -or ($curChar -eq '{') -or ($curChar -eq '}') -or ($curChar -eq '\\'))
{
$null = $sb.Append("\'");
$null = $sb.Append(([int]$curChar).ToString("X2", [System.Globalization.CultureInfo]::InvariantCulture));
}
elseif($curChar -lt 0x80)
{
$null = $sb.Append($curChar);
}
else
{
$null = $sb.Append("\u");
$null = $sb.Append(([int]$curChar).ToString([System.Globalization.CultureInfo]::InvariantCulture));
$null = $sb.Append('?');
}

}

return $sb.ToString();

}

function GetDefaultBrowser()
{
[string]$assocString = $null
$dll = "NetworkDiagnosticSnapIn.dll"

try
{
RegSnapin $dll

$assocString = [Microsoft.Windows.Diagnosis.Network.AssociationInfo]::GetAssociation("http","open");
trap [Exception]
{
$assocString = $null;
}
}
finally
{
UnregSnapin $dll
}

return $assocString;
}

function GetWebNDFIncidentData($URL, $DefaultConnectivity)
{
#build entry point parameters
$haXML = "<HelperAttributes><HelperAttribute><Name>URL</Name><Type>AT_STRING</Type><Value><![CDATA[" + $URL + "]]></Value></HelperAttribute>"
if($DefaultConnectivity)
{
#sqm explorer as the client rather than sdiaghost.exe
$haXML += "<HelperAttribute><Name>NDFSQMCallerApplication</Name><Type>AT_STRING</Type><Value>Windows\Explorer.EXE</Value></HelperAttribute>"
$defaultBrowser = GetDefaultBrowser;
if($defaultBrowser)
{
$haXML += "<HelperAttribute><Name>AppID</Name><Type>AT_STRING</Type><Value>"+ $defaultBrowser + "</Value></HelperAttribute>"
}
}
$haXML += "</HelperAttributes>"
return @{"HelperClassName" = "WinInetHelperClass"; "HelperAttributes" =$haXML}
}

function GetValidURL($CandidateURL)
{
$toReturn = $null
$url = IsValidURL $CandidateURL
if($url -eq $null)
{
if($CandidateURL.IndexOf("://") -eq -1)
{
$updatedURL = "http://" + $CandidateURL
$url = IsValidURL $updatedURL
if($url)
{
$toReturn = $url
}
}
}
else
{
$toReturn = $url
}

return $toReturn
}

function GetErrorRTF($Description, $Error)
{
$escapedDesc = EscapeForRTF $Description;
$escapedError = EscapeForRTF $Error;
$rtf = LoadResourceString($ERROR_MSG_RTF_RESOURCE);
return $rtf.Replace("%DESC%", $escapedDesc).Replace("%ERROR%", $escapedError);
}

function WebEntry()
{
$IT_WebChoice = Get-DiagInput -ID "IT_WebChoice"
if($IT_WebChoice -eq $null)
{
#Failed retriving Web Choice
return $null
}

$IT_URL = $DefaultDiagURL
if(!($IT_WebChoice -eq "Internet"))
{
$IT_URL = Get-DiagInput -ID "IT_URL"
if($IT_URL -eq $null) {
#Failed retriving URL
return $null
}

#verify that it is a valid URL
$validURL = GetValidURL $IT_URL[0]
while($validURL -eq $null)
{
#build the RTF text
$replacedError = [System.String]::Format([System.Globalization.CultureInfo]::InvariantCulture, $localizationString.interaction_InvalidURL_FormatError, $IT_URL[0]);
$RTFText = GetErrorRTF ($localizationString.interaction_InvalidURL_Desc) ($replacedError);

#reprompt for input
$IT_URL = Get-DiagInput -ID "IT_Invalid_URL" -p @{"URL" = $IT_URL; "RTFText" = $RTFText}
if($IT_URL -eq $null) {
#Failed retriving URL
return $null
}

$validURL = GetValidURL $IT_URL[0]
}
}

return GetWebNDFIncidentData $validURL $false
}

#function assumes passed in UNC is in \\host\share form (share can be missing)
function ContainsInvalidUNCChars($UNC)
{
&{
#will return an exception if the string has invalid characters
$ignoreResult = [System.IO.Path]::IsPathRooted($UNC)

#check the path for invalid characters
#remove the starting slashes
$tmp = $UNC.Substring(2)
$nextSlash = $tmp.IndexOf("\")
if(($nextSlash -lt 0) -or ($nextSlash -eq ($nextSlash.Length - 1)))
{
#string only contains hostname
#hostname is already validated in IsUNCFormat function
return $false
}
#remove host and backslash after host
$UNCPath = $tmp.Substring($nextSlash+1)

#under certain circ*mstances some of these make it through the above check
#so we do a direct sanity check here
if(!($UNCPath.IndexOfAny(@('/',':','*','?','"','<','>','|')) -eq -1))
{
return $true;
}

return $false;
}
trap [Exception]
{
return $true;
}
}

function GetValidUNC($CandidateUNC)
{
$toReturn = $null

#is it valid
$unc = IsUNCFormat $CandidateUNC
if($unc)
{
$invalidChars = ContainsInvalidUNCChars $unc
if($invalidChars)
{
$toReturn = -1;
}
else
{
$toReturn = $unc
}
}

return $toReturn;
}

function GetUNCNDFIncidentData($UNC)
{
#build entry point parameters
$haXML = "<HelperAttributes><HelperAttribute><Name>UNCPath</Name><Type>AT_STRING</Type><Value><![CDATA[" + $UNC + "]]></Value></HelperAttribute></HelperAttributes>"
return @{"HelperClassName" = "SMBHelperClass"; "HelperAttributes" =$haXML}
}

function FileSharingEntry()
{
$IT_UNC = Get-DiagInput -ID "IT_UNC"
if($IT_UNC -eq $null) {
#Failed retriving UNC path
return $null
}

#assign input to non-array variable to facilitate usage and transform
$validUNC = GetValidUNC $IT_UNC[0]
while((!$validUNC) -or ($validUNC -eq -1))
{
#build the RTF text
#use original entry for re-prompt even though "file://" UNC may have been transformed
$replacedError = "";
if(!$validUNC)
{
$replacedError = [System.String]::Format([System.Globalization.CultureInfo]::InvariantCulture, $localizationString.interaction_InvalidUNC_FormatError, $IT_UNC[0]);
}
else
{
$replacedError = [System.String]::Format([System.Globalization.CultureInfo]::InvariantCulture, $localizationString.interaction_InvalidUNC_CharError, $IT_UNC[0]);
}
$RTFText = GetErrorRTF ($localizationString.interaction_InvalidUNC_Desc) ($replacedError);

#reprompt for input
$IT_UNC = Get-DiagInput -ID "IT_Invalid_UNC" -p @{"UNC" = $IT_UNC; "RTFText" = $RTFText}
if($IT_UNC -eq $null) {
#Failed retriving UNC path
return $null
}

$validUNC = GetValidUNC $IT_UNC[0]
}

return GetUNCNDFIncidentData $validUNC
}

function NetworkAdapterEntry()
{
#enumerate interfaces to build options list
$interfaces = get-wmiobject -class Win32_NetworkAdapter
#hash table with options
$optionList = @()
foreach($curInterface in $interfaces)
{
if($curInterface.GUID -ne $null)
{
$curHash = @{"Name"=$curInterface.NetConnectionID}
$curHash += @{"Description"=$curInterface.NetConnectionID}
$curHash += @{"Value"=$curInterface.GUID}

$optionList += @($curHash)
}
}

if($optionList.Count -gt 1)
{
#add zero guid entry to check all interfaces
$optionList += @(@{"Name"=$localizationString.interaction_AllAdapters; "Description"=$localizationString.interaction_AllAdapters; "Value"="{00000000-0000-0000-0000-000000000000}"; "ExtensionPoint"="<Default />"})

#get interface selection from user
$IT_NetworkAdapter = Get-DiagInput -ID "IT_NetworkAdapter" -c $optionList

if($IT_NetworkAdapter -eq $null) {
throw "Failed retriving Network Connetion ID from user"
}
}
elseif($optionList.Count -eq 1)
{
$IT_NetworkAdapter = $optionList[0]["Value"]
}
else
{
#No NICs, do zero GUID diag
$IT_NetworkAdapter = "{00000000-0000-0000-0000-000000000000}"
}

#build entry point parameters
$haXML = "<HelperAttributes><HelperAttribute><Name>guid</Name><Type>AT_GUID</Type><Value>" + $IT_NetworkAdapter + "</Value></HelperAttribute></HelperAttributes>"
return @{"HelperClassName" = "NetConnection"; "HelperAttributes" =$haXML}
}

function WinsockEntry()
{
$IT_RemoteAddress = Get-DiagInput -ID "IT_RemoteAddress"
if($IT_RemoteAddress -eq $null -or $IT_RemoteAddress[0].Length -eq 0) {
#Failed retriving Remote Address
return $null
}

$IT_Protocol = Get-DiagInput -ID "IT_Protocol"
if($IT_Protocol -eq $null -or $IT_Protocol[0].Length -eq 0) {
#Failed retriving Remote Port
return $null
}

$IT_ApplicationID = Get-DiagInput -ID "IT_ApplicationID"
if($IT_ApplicationID -eq $null -or $IT_ApplicationID[0].Length -eq 0) {
#Failed retriving Application ID
return $null
}

#build entry point parameters
$haXML = "<HelperAttributes><HelperAttribute><Name>remoteaddr</Name><Type>AT_SOCKADDR</Type><Value>" + $IT_RemoteAddress + "</Value></HelperAttribute>";
$haXML += "<HelperAttribute><Name>protocol</Name><Type>AT_UINT32</Type><Value>" + $IT_Protocol + "</Value></HelperAttribute>";
$haXML += "<HelperAttribute><Name>localaddr</Name><Type>AT_SOCKADDR</Type><Value>0.0.0.0</Value></HelperAttribute>";
$haXML += "<HelperAttribute><Name>appid</Name><Type>AT_STRING</Type><Value>" + $IT_ApplicationID + "</Value></HelperAttribute>";
$haXML += "</HelperAttributes>";
return @{"HelperClassName" = "Winsock"; "HelperAttributes" =$haXML}
}

function GroupingEntry()
{
$IT_GroupName = Get-DiagInput -ID "IT_GroupName"
if($IT_GroupName -eq $null -or $IT_GroupName[0].Length -eq 0) {
#Failed retriving Remote Address
return $null
}

#build entry point parameters
$haXML = "<HelperAttributes><HelperAttribute><Name>groupname</Name><Type>AT_STRING</Type><Value>" + $IT_GroupName + "</Value></HelperAttribute></HelperAttributes>"
return @{"HelperClassName" = "GroupingHelperClass"; "HelperAttributes" =$haXML}
}

function InboundEntry()
{
$staticOptionRes = @($INBOUND_FILESHARE_RESOURCE, $INBOUND_REMOTEDESKTOP_RESOURCE, $INBOUND_DISCOVERY_RESOURCE)
$staticOptions = @($INBOUND_FILESHARE_PARAM, $INBOUND_REMOTEDESKTOP_PARAM, $INBOUND_DISCOVERY_PARAM)
# If defined for the corresponding option, the item will be filtered out if the current sku matches anything in the list
# Sku values as defined in the OperatingSystemSKU property of Win32_OperatingSystem
$SKUFilters = @($null, @(2,3,5,11), $null)

#get the SKU, to filter out inappropriate static options
$SKUObject = get-wmiobject -class Win32_OperatingSystem -property "OperatingSystemSKU"
$SKU = $SKUObject.OperatingSystemSKU

$optionList = @()
$curOptionIndex = 0
for($curStaticOption = 0; $curStaticOption -lt $staticOptions.Length; $curStaticOption++)
{
$SKUFilter = $SKUFilters[$curStaticOption]
if($SKUFilter)
{
if($SKUFilter -contains $SKU)
{
#should filter out this option from the list because it is not present in the SKU
continue;
}
}

$curApp = LoadResourceString($staticOptionRes[$curStaticOption])
$curHash = @{}
$curHash.Add("Name",$curApp)
$curHash.Add("Value",$curOptionIndex)
$curHash.Add("Description",$curApp)
$curHash.Add("HelperAttributeName","serviceid")
$curHash.Add("HelperAttributeValue",$staticOptions[$curStaticOption])
$optionList += $curHash
$curOptionIndex++
}

#add dynamic options (do not fail if call fails)
$script:ExpectingException = $true

$dll = "NetworkDiagnosticSnapIn.dll"

try
{
RegSnapin $dll

$droppedApps = [Microsoft.Windows.Diagnosis.Network.FirewallApi.ManagedMethods]::GetDiagnosticAppInfo()
$script:ExpectingException = $false
if($droppedApps)
{
foreach($droppedApp in $droppedApps)
{
#omit svchosts since we cannot display a friendly name for them
if($droppedApp.Path.IndexOf("svchost") -eq -1)
{
$appEntryDisplayStr = [System.String]::Format([System.Globalization.Cul

ScriptBlock ID: 9dde433b-59f7-43ff-9724-da85bd9a7705
Path: C:\Users\Chaz\AppData\Local\Temp\SDIAG_fc401818-2c95-4b72-9b00-d91a618105c1\UtilityFunctions.ps1

Firmware replying trojan that uses genuine windows remoting to take over (2024)

FAQs

How do I get rid of Trojan Virus permanently? ›