# gunzip
# Decompress gzip-compressed data (often used in multi-stage payload extraction)
# FOR610 Labs: 3.4 | Sections: 3

% compression, extraction

# Basic usage
gunzip -c compressed.gz > output.bin


# --- Recipes (multi-tool chains) ---

# >> Decode Base64 + Gzip Payload
# Find Base64 strings in the script
base64dump.py <script.ps1> -n 10
# Decode Base64 and decompress gzip in one chain
base64dump.py <script.ps1> -s <selection> -d | gunzip > decoded.ps1

# >> Full Office Macro Decode Chain
# Step 1: List streams and extract VBA
oledump.py <document>
oledump.py <document> -s <macro_stream> -v
# Step 2: Extract Base64 from data stream
oledump.py <document> -s <data_stream> -d | base64dump.py -s 1 -d > stage1.ps1
# Step 3: Decode second Base64 layer + decompress
base64dump.py stage1.ps1 -s 3 -d | gunzip > stage2.ps1
# Step 4: XOR decode the shellcode
base64dump.py stage2.ps1 -s 2 -d | translate.py 'byte ^ 35' > shellcode.bin
# Step 5: Emulate the shellcode
scdbgc /f shellcode.bin /s -1