MemProcFS-Analyzer does not work if a computer is behind a proxy or if ICMP is filtered by a firewall

[Minoru Kobayashi]

MemProcFS-Analyzer doen't work if a computer is behind a proxy server like below.

Transcript started, output file is C:\tools\MemProcFS-Analyzer\2023-10-13T064208-data.txt

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MemProcFS-Analyzer v0.9 - Automated Forensic Analysis of Windows Memory Dumps for DFIR
(c) 2021-2023 Martin Willing at Lethal-Forensics (https://lethal-forensics.com/)

Analysis date: 2023-10-13 06:42:08 UTC

[Error] f001.backblazeb2.com is NOT reachable. Please check your network connection and try again.

This is because MemProcFS-Analyzer uses Test-Connection. It is using ping.
Therefore, if ICMP packets are filtered by a firewall, it will also not work.

[Martin Willing]

Hi, is following command working for you?

((Test-NetConnection -ComputerName f001.backblazeb2.com -Port 443).TcpTestSucceeded)

[Minoru Kobayashi]

It does not work.
Test-NetConnection is not able to specify a proxy server.

PS C:\Windows\system32> ((Test-NetConnection -ComputerName f001.backblazeb2.com -Port 443).TcpTestSucceeded)
WARNING: TCP connect to (104.153.233.181 : 443) failed
WARNING: Ping to 104.153.233.181 failed with status: TimedOut
False

[Martin Willing]

Pleasy try:

$URL = "https://f001.backblazeb2.com/file/EricZimmermanTools/net6/AmcacheParser.zip"
(Invoke-WebRequest -Uri $URL -UseBasicParsing -DisableKeepAlive | Select-Object StatusCode).StatusCode

[Minoru Kobayashi]

It's working.

PS C:\Windows\system32> $URL = "https://f001.backblazeb2.com/file/EricZimmermanTools/net6/AmcacheParser.zip"
PS C:\Windows\system32> (Invoke-WebRequest -Uri $URL -UseBasicParsing -DisableKeepAlive | Select-Object StatusCode).StatusCode
200

[Martin Willing]

Nice. I will implement it in the next release. The release of MemProcFS-Analyzer v1.0 is planned for the next 1-2 weeks.

Check if Backblaze B2 Platform is reachable

$URL = "https://f001.backblazeb2.com/file/EricZimmermanTools/net6/AmcacheParser.zip"
$StatusCode = (Invoke-WebRequest -Uri $URL -UseBasicParsing -DisableKeepAlive | Select-Object StatusCode).StatusCode
if ($StatusCode -ne "200") 
{
    Write-Host "[Error] f001.backblazeb2.com is NOT reachable. Please check your network connection and try again." -ForegroundColor Red
    $Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
    Exit
}