CredSpray

Multi-protocol credential validation tool for penetration testing

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Overview

CredSpray is a bash wrapper around NetExec (nxc) designed to streamline credential validation across multiple protocols during penetration testing. It supports both spray mode (testing all users against all passwords) and no-spray mode (paired credential testing).

Perfect for OSCP/CTF/CPTS/PNPT environments, password spraying attacks, targeted credential testing, and multi-protocol enumeration with consolidated results.

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Features

• Mixed Hashes/Password File Handling: Automatically detects and separates hashes from passwords in a combined file
• Interrupt Handling: Skip current test (Ctrl+C once) or exit (Ctrl+C twice)
• Spray & No-Spray Modes: Test all combinations or pair credentials
• Dual Authentication: Supports both domain and local authentication
• Multi-Protocol Support: SMB, WinRM, RDP, SSH, MSSQL, LDAP, FTP, WMI, VNC, NFS
• Results Tracking: Automatically saves successful authentications
• Troubleshooting Hints: Built-in error detection with solutions (see Common Issues Gist)

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CTF/OSCP/CPTS/PNPT Use Cases & Examples

Common Scenarios

Scenario 1: Same file contains both usernames and passwords

# For paired testing (spraying usernames as passwords)
credspray.sh -t 192.168.1.100 -u usernames.txt -p usernames.txt --no-spray

Scenario 2: Found credentials in different formats with orphaned hashes and users

# Create a combined file with all findings
vim findings.txt
admin:Password123
strikoder:8846f7eaee8fb117ad06bdd830b7586c
:Welcome2024
:8846f7eaee8fb117ad06bdd830b7586445

# Test all credentials against target
credspray.sh -t 10.10.10.100 -u findings.txt -c findings.txt

Scenario 3: Password spraying with common passwords

# Check out NagoyaSpray for common password lists
# https://github.com/strikoder/NagoyaSpray

# Spray across all protocols
credspray.sh -t 10.10.10.100 -u users.txt -p nagoyapasswords.txt

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Installation

Prerequisites

NetExec (nxc) - Required for credential testing

pip install netexec

Install CredSpray

Manual installation

# Clone the repository
git clone https://github.com/strikoder/CredSpray.git
cd CredSpray

# Make the script executable
chmod +x credspray.sh

# Optional: Move to system path
sudo cp credspray.sh /usr/local/bin/credspray

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Usage

credspray.sh -t <target> -u <username|userfile> [-p <password|passfile>] [-H <hash|hashfile>] [-c <combined_file>] [-a <auth_type>] [--spray|--no-spray]

Options

Option	Description
-t <target>	Target IP or hostname (required)
-u <user>	Username or file with usernames (required)
-p <password>	Password or file with ONLY passwords
-H <hash>	NTLM hash or file with ONLY hashes
-c <file>	Combined file with mixed format (user:pass, user:hash, etc.)
-a <auth_type>	Authentication type: both (default), local, domain
--spray	Spray mode: test all users with all passwords (DEFAULT)
--no-spray	No-spray mode: pair credentials (user1:pass1, user2:pass2)

Important Notes

• Default mode is spray - use --no-spray for paired testing
• Default authentication mode is both (domain + local) - use -a to specify domain or local only

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Supported Protocols by NXC

Protocol	Port	Hash Support	Local Auth
SMB	445	Yes	Yes
WinRM	5985	Yes	Yes
RDP	3389	Yes	Yes
SSH	22	No	N/A
MSSQL	1433	Yes	Yes
LDAP	389	Yes	Yes
FTP	21	No	N/A
WMI	135	Yes	Yes
VNC	5900	No	Yes
NFS	2049	No	Yes

Protocol Selection

After running the script, you'll be prompted to select protocols:

Examples:

• 1,2,3 - Test SMB, WinRM, and RDP
• 1-5 - Test protocols 1 through 5
• all - Test all available protocols

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File Formats

User File (users.txt)

administrator
strikoder

Password File (passwords.txt)

Password123!
Summer2024

Hash File (hashes.txt)

NTLM hashes:

8846f7eaee8fb117ad06bdd830b7586c
32ed87bdb5fdc5e9cba88547376818d4

Combined File Format (-c option)

Spray Mode - Extracts all users and all credentials separately:

user1:password1          → extracts: user1, password1
user2:hash123...         → extracts: user2, hash123...
user3:                   → extracts: user3 (no credential)
:orphan_password         → extracts: orphan_password
standalone_username      → extracts as username
:unknown_credential    → smart detection (hash vs password)

No-Spray Mode - Pairs credentials when the same file used twice -u creds.txt -p creds.txt (skips unpaired entries):

user1:password1          → tests: user1:password1
user2:hash123...         → tests: user2:hash123...
user3:                   → SKIPPED (no credential)
:orphan_password         → SKIPPED (no username)
standalone_username      → SKIPPED (no credential)

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Acknowledgments

• NetExec - The powerful network protocol testing tool that powers CredSpray. Check out the NXC Cheatsheet
• OSCP/CTF Community - For inspiring practical penetration testing tools

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Made with care for the penetration testing community