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Open the Analyst Desktop --> Investigations (or the folder where "pcap_artifact5.txt" resides) and open the file in a viewer (Notepad/Notepad++/less) to quickly profile the encoding. Look for telltale patterns: Base64: only A-Z, a-z, 0-9, +, /, with optional = padding; often wrapped across lines
Base32: A-Z and 2-7, with optional = padding
Hex: only 0-9 and a-f (or A-F), usually even-length pairs URL-encoded: lots of %xx sequences ROT13/Caesar: readable letters but shifted; looks "alphabetic nonsense" without digits/symbols
Nested encodings: a decoded blob turns into another encoded blob (repeat until plain text)

If you're on Windows (PowerShell), use this decision path and save exactly to the Analyst Desktop as
"pcap_artifact5_decoded.txt".

PowerShell - try Base64 first (most common in PCAP artifacts)

Start --> Windows PowerShell

Run (adjust the input path if needed):
$in = Get-Content -Raw "$env:USERPROFILE\Desktop\pcap_artifact5.txt"
try {
$bytes = [Convert]::FromBase64String($in -replace '\s','');
$text = [Text.Encoding]::UTF8.GetString($bytes);
Set-Content -NoNewline -Path "$env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt" -Value $text;

Write-Host "Base64 decode succeeded";
} catch { Write-Host "Not clean Base64;
try other decoders"; }

If Base64 fails, test URL-decode (common after Base64 or alone)
Add-Type -AssemblyName System.Web
$in = Get-Content -Raw "$env:USERPROFILE\Desktop\pcap_artifact5.txt"
$txt = [System.Web.HttpUtility]::UrlDecode($in)
Set-Content -NoNewline "$env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt" -Value $txt

If hex-encoded text is suspected
$raw = Get-Content -Raw "$env:USERPROFILE\Desktop\pcap_artifact5.txt"
$hex = ($raw -replace '[^0-9A-Fa-f]','')
$bytes = for($i=0;$i -lt $hex.Length;$i+=2){ [Convert]::ToByte($hex.Substring($i,2),16) }
$text = [Text.Encoding]::UTF8.GetString($bytes)
Set-Content -NoNewline "$env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt" -Value $text

If text looks like ROT13 (letters only, "gurer", "pbqr", etc.)
$in = Get-Content -Raw "$env:USERPROFILE\Desktop\pcap_artifact5.txt"
$rot13 = ($in.ToCharArray() | ForEach-Object {
$c=[int][char]$_;
if(($c -ge 65 -and $c -le 90)){ char } elseif(($c -ge 97 -and $c -le 122)){ char }
else{ [char]$c }
}) -join ''
Set-Content -NoNewline "$env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt" -Value $rot13

If the first decode yields another encoded blob, repeat the appropriate step but set the input to the
previously produced decoded file
$in = Get-Content -Raw "$env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt"...then re-run the relevant decoder until you get clean, readable text.

If you're on Linux/macOS (Terminal), use this decision path and save the output file to the Desktop.

Base64 (first try) tr -d '\r\n\t ' < ~/Desktop/pcap_artifact5.txt | base64 -d > /Desktop/pcap_artifact5_decoded.txt 2>/Desktop/
pcap_artifact5.err

If Base64 fails, try Base32 base32 -d ~/Desktop/pcap_artifact5.txt > /Desktop/pcap_artifact5_decoded.txt 2>/Desktop/
pcap_artifact5.err

If hex is suspected (strip non-hex, then convert) tr -cd '0-9A-Fa-f' < ~/Desktop/pcap_artifact5.txt | xxd -r -p > ~/Desktop/pcap_artifact5_decoded.txt

If URL-encoded python3 - << 'PY' > ~/Desktop/pcap_artifact5_decoded.txt
import sys, urllib.parse
data=sys.stdin.read()
print(urllib.parse.unquote(data), end="")
PY
< ~/Desktop/pcap_artifact5.txt

If ROT13 tr 'A-Za-z' 'N-ZA-Mn-za-m' < ~/Desktop/pcap_artifact5.txt > ~/Desktop/pcap_artifact5_decoded.txt

If decoding reveals another layer (e.g., Base64 --> URL-encoded --> text), feed the new output back through the appropriate decoder until you end with clear text (repeat the relevant command with input = pcap_artifact5_decoded.txt and write back to the same file or a temp, then move it to the required filename).

Validate the final output and ensure the exact filename/location Open the resulting file to confirm it's human-readable and complete: Windows: notepad $env:USERPROFILE\Desktop\pcap_artifact5_decoded.txt Linux/macOS: less ~/Desktop/pcap_artifact5_decoded.txt

Ensure the file is named exactly pcap_artifact5_decoded.txt and sits on the Analyst Desktop.
If the decoded content appears binary (e.g., shows "PK" or "%PDF"), you still save the decoded text form if the assignment requires text; otherwise, note the artifact type separately and extract text only if instructed.