How To Hide Files in a Image

-



Method 1: Using Command Line (e.g., on Windows or Linux)

You can use the copy command (Windows) or cat (Linux/macOS) to combine files:

On Windows (Command Prompt):

Shell

copy /b image.jpg + secret.zip output.jpg

Show more lines

  • image.jpg: the cover image
  • secret.zip: the file you want to hide
  • output.jpg: the resulting image with the hidden file

You can still open output.jpg as a normal image, but if you open it with a zip tool (like WinRAR or 7-Zip), you'll see the hidden file.

On Linux/macOS (Terminal):

Shell

cat image.jpg secret.zip > output.jpg

 How to Extract the Hidden File

To retrieve the hidden file:

  1. Open output.jpg with a zip tool (e.g., 7-Zip, WinRAR).
  2. You’ll see the hidden secret.zip contents inside.

  Notes & Considerations

  • This method doesn’t encrypt the hidden file it just hides it. Anyone who knows the trick can extract it.
  • For more secure hiding, you can encrypt the file before embedding it.
  • This works best with formats like .jpg or .png, but not all image viewers or editors will preserve the hidden data if the image is modified.

 How to encrypt the files. 

Step 1: Encrypt the File

You can use tools like:

1. Using ZIP with Password (Simple Encryption)

This is a quick way to encrypt a file:

Shell

zip -e secret.zip secret.txt

  • -e enables encryption.
  • You’ll be prompted to enter a password.
  • This creates secret.zip with encrypted contents.

2. Using OpenSSL (Stronger Encryption)

For stronger encryption using AES:

Shell

openssl enc -aes-256-cbc -salt -in secret.txt -out secret.enc

Show more lines

  • This encrypts secret.txt into secret.enc using AES-256.
  • You’ll be prompted for a password.

To decrypt later:

Shell

openssl enc -d -aes-256-cbc -in secret.enc -out secret.txt

Step 2: Hide the Encrypted File in an Image

Once encrypted, you can hide it in an image using:

Windows:
copy /b image.jpg + secret.enc output.jpg
Linux:
cat image.jpg secret.enc > output.jpg

Step

Tool

Purpose

1

zip -e or openssl

Encrypt the file

2

copy /b or cat

Hide encrypted file in image

 

 

 

Popular posts from this blog

WSUS CVE-2025-59287 Mitigation

-
Image
CVE-2025-59287 is a critical Remote Code Execution (RCE) vulnerability affecting Windows Server Update Services (WSUS) . Here's a detailed breakdown of what it is, how it works, and what you should do about it: Overview Disclosed: October 2025 Patch Tuesday CVSS Score: 9.8 (Critical) Affected Systems: Windows Server 2012 through 2025 (including Server Core installations) Exploitability: Microsoft rates it as “Exploitation More Likely” Technical Details The vulnerability arises from unsafe deserialization of untrusted data in WSUS. Specifically, the GetCookie() endpoint in WSUS processes encrypted AuthorizationCookie objects without proper type validation. The deserialization occurs via .NET BinaryFormatter , which is known to be insecure when handling untrusted input. Attackers can send a crafted SOAP request to WSUS over port 8530 , containing a malicious AuthorizationCookie . The cookie is decrypted using a hardcoded AES key and then deserialized, allow...
Read more

Microsoft Defender for Endpoint (DFE) and Mitigation for It

-
Image
  The recent vulnerability affecting Microsoft Defender for Endpoint (DFE) involves critical flaws in how the agent communicates with its cloud backend, potentially allowing attackers to bypass authentication and manipulate incident response processes. Key Vulnerabilities in Defender for Endpoint (DFE) Authentication Bypass : Attackers can impersonate the Defender agent using only the machine ID and tenant ID, which are accessible to low-privileged users via registry reads. This allows them to spoof commands and responses. Command Interception : By querying endpoints like /edr/commands/cnc , attackers can intercept or fake responses (e.g., falsely reporting a device as isolated), undermining actual security status. Certificate Pinning Circumvention : Researchers bypassed HTTPS protections by patching memory functions (e.g., CRYPT32!CertVerifyCertificateChainPolicy ) to inspect traffic in plaintext using tools like Burp Suite and WinDbg. Azure Blob Upload Exploits : Attackers c...
Read more

Oracle has disclosed a critical vulnerability (CVE-2025-61882) (Patch Notes)

-
Image
  Oracle has disclosed a critical vulnerability (CVE-2025-61882) affecting E-Business Suite versions 12.2.3 through 12.2.14. This pre-authentication remote code execution (RCE) flaw enables unauthenticated attackers to exploit multiple chained weaknesses — including SSRF, CRLF injection, authentication bypass, and unsafe XSLT processing — to gain full control of affected systems. Risk Assessment: Severity: Critical (CVSS 9.8) Exposure: Internet-facing Oracle EBS instances are at immediate risk Threat Activity: Active exploitation confirmed by threat intelligence sources, including Cl0p ransomware group Business Impact: Potential compromise of financial systems, data exfiltration, and operational disruption Recommended Actions: Immediate Patch Deployment: Apply Oracle’s July 2025 Critical Patch Update to all affected EBS environments. Network Segmentation: Restrict public access to Oracle EBS systems. Ensure they are isolated from internet-facing zones. Threat Monito...
Read more