Metamask Vault Decryptor

POC tool to decrypt metamask vault wallets

This tool is proudly the first publicly released Metamask Vault decryptor / cracker to support the new Metamask wallet vaults which have a dynamic iteration.

./metamask_decryptor_amd64.bin -h metamask_json.txt -w wordlist.txt
 ------------------------------------ 
| Cyclone's Metamask Vault Decryptor |
 ------------------------------------ 

Vault file:     metamask_json.txt
Valid Vaults:   1
CPU Threads:    16
Wordlist:       wordlist.txt
Working...

Decrypted: 0/1  5430.89 h/s     00h:01m:00s

Info:

• Supports previous Metamask vaults as well as new vaults with "KeyMetadata" which have dynamic iterations
• If you need help extracting Metamask vaults, use Metamask Extractor https://github.com/cyclone-github/metamask_extractor
• Metamask Vault Decryptor will be superseded by hashcat once a custom hashcat kernel is released, however, Metamask Vault Decryptor also displays the seed phrase alongside the vault password, which hashcat does not currently support

Example vaults supported:

• Old vault format: {"data": "","iv": "","salt": ""}
• New vault format: {"data": "","iv": "","keyMetadata": {"algorithm": "PBKDF2","params": {"iterations": }},"salt": ""}

Usage example:

• ./metamask_decryptor.bin -h {wallet_json} -w {wordlist}

Output example:

If the tool successfully decrypts the vault, tool will print the vault json, seed phrase and vault password

Decrypted Vault: '{}'
Seed Phrase:    ''
Vault Password: ''

Compile from source:

• If you want the latest features, compiling from source is the best option since the release version may run several revisions behind the source code.
• This assumes you have Go and Git installed
  • git clone https://github.com/cyclone-github/metamask_decryptor.git
  • cd metamask_decryptor
  • go mod init metamask_decryptor
  • go mod tidy
  • go build -ldflags="-s -w" metamask_decryptor.go
• Compile from source code how-to:
  • https://github.com/cyclone-github/scripts/blob/main/intro_to_go.txt