d4Rk's 1337 h4x0r guide
  • Introduction
  • Reconnaissance
    • Recon
    • OSINT
  • Enumeration
    • Network discovery
    • Port scanning
    • Webserver scanning
    • Exploit detection
    • Fuzzing
    • Process monitoring
  • Exploitation
    • Shells
      • Shells
      • TTY
    • Passwords
      • Hashcat
      • John the Ripper (JTR)
      • Hydra
      • Passwords & credentials
    • Web
      • SQL injection (SQLi)
      • Cross site scripting (XSS)
      • File inclusions (LFI, RFI)
      • Directory traversal
      • Cross site request forgery (CSRF)
      • XML external entity (XXE)
      • Cross origin resource sharing (CORS)
      • Server-side request forgery (SSRF)
      • Server-side template injection (SSTI)
      • Access control vulnerabilities
      • Authentication vulnerabilities
      • JWT attacks
      • File uploads
      • Host header attacks
      • Clickjacking
      • Logic flaws
      • OS command injection
      • HTTP Request smuggling
      • Insecure deserialization
      • DOM-based
      • WebSockets
      • Web cache poisoning
    • Buffer overflow
      • General
      • Linux
      • Windows
    • Misc
      • Evasion
      • SQSH
  • Privilege escalation
    • Linux
      • Overview
    • Windows
      • Overview
      • Mimikatz
      • PowerSploit
      • Juicy Potato, Rotten Potato (NG)
      • JAWS
      • Empire
      • SILENTTRINITY
  • Post exploitation
    • Loot
    • Pivoting
    • Standalone Tools
  • Services
    • TCP
      • TCP 21: FTP
      • TCP 22: SSH
      • TCP 23: Telnet
      • TCP 25, 587: SMTP
      • TCP 53: DNS
      • TCP 80, 443: HTTP(S)
      • TCP 88: Kerberos
      • TCP 110, 995: POP3(S)
      • TCP 111: rpcbind
      • TCP 135: MSRPC
      • TCP 139, 445: NetBIOS, SMB
      • TCP 143, 993: IMAP(S)
      • TCP 389, 636, 3268, 3269: LDAP
      • TCP 1433, UDP 1434: MSSQL Server
      • TCP 2049: NFS
      • TCP 3306: MySQL
      • TCP 3389: RDP
      • TCP 5985: WinRM
      • TCP 6379: Redis
      • TCP 27017: MongoDB
    • UDP
      • UDP 137, 138, TCP 139: NetBIOS
      • UDP 161: SNMP
    • Misc
      • Active Directoy
      • Apache Tomcat
      • Drupal
      • H2 Databases
      • IIS
      • IPsec
      • IRC
      • Java Applets
      • Java RMI
      • Jenkins
      • Joomla
      • Oracle
      • PHP
      • SharePoint
      • WordPress
  • File transfer
    • Overview
    • Wget
    • Pure-FTPd
    • TFTP
    • VBScript: Wget clone
  • Misc
    • Bash
    • Burp Suite
    • Crypto
    • Ebowla
    • Firefox extensions
    • Impacket
    • Memory forensics
    • Metasploit Framework (MSF)
    • MITM
    • Msfvenom
    • Pass the Hash (PTH)
    • PowerShell
    • PowerShell on Linux
    • Wireshark
    • Wordlists and dictionaries
  • Bug Bounty
    • Platforms
    • Tools
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On this page
  • Decrypt file
  • Find cipher used for encryption
Edit on GitHub
  1. Misc

Crypto

Decrypt file

Find cipher used for encryption

ciphers.lst
-aes-256-cbc
-aes-128-cbc
-aes-256-ecb
-aes-128-ecb
-aes-256-ofb
-aes-128-ofb
-rc4
-rc4-cbc
-aria-128-cbc
-des

Generate files of various lengths (in steps of 8)

for i in $(seq 0 8 176); do python -c "print 'A'*$i" > $i; done

Generate encrypted files with various ciphers if various length

for cipher in $(cat ciphers.lst); do
	for length in $(ls | grep ^[0-9]); do
		openssl enc $cipher -e -in $length -out $length$cipher.enc -k Whatever
	done
done

Check which of those match the length of the encrypted file

ls *.enc | xargs wc -c | grep '176 '

Crack it^^

bruteforce-salted-openssl -t 10 -f <wordlist> -c aes-256-cbc -d sha256 <encrypted-file>

Decrypt the file

openssl enc -aes-256-cbc -d -in <encrypted-file> -out <decrypted-file> -k <password>
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Last updated 3 years ago