🦑Elliptic Curve Cryptography (ECC) Encryption and decryption.:

Process of Implementation
I implemented ECC in a way that could be useful for malware development by encrypting shellcode with a public key and then decrypting it using both the corresponding private key and an additional component called the R Point. This approach adds an extra layer of security, ensuring that only those with the correct private key and R Point can decrypt and execute the shellcode.

Note: Please go through the main function where i explained function features.

I generate random public and private keys then,

I have converted Keys into bytes for ease of handling, then reconstruct these keys for use in encryption and decryption. The encryption process involves using the public key to encrypt the shellcode and generate an R Point, which is serialized into bytes. To decrypt, you need this R Point along with the private key, which together allow the shellcode to be recovered and executed. However, my method of executing the shellcode is basic and could potentially be detected by security software, so more sophisticated execution methods would be necessary for real-world scenarios.

This Proof of Concept shows how ECC can be adapted for stealthy malware operations by leveraging its inherent security properties.

Small Snippet to encrypt and decrypt Messages
Write the Encrypt and decrypt function

// #![allow(deprecated)]
pub use k256::{elliptic_curve::{sec1::FromEncodedPoint, AffinePoint, Field}, EncodedPoint, ProjectivePoint, Scalar, Secp256k1};
pub use sha2::{Digest, Sha256};
pub use rand::rngs::OsRng;
pub use k256::elliptic_curve::group::GroupEncoding;
pub use k256::ecdsa::VerifyingKey;

fn encode_shellcode(
    shellcode: &[u8],
    public_key: &AffinePoint<Secp256k1>,
) -> (EncodedPoint, Vec<u8>) {
    let mut rng = OsRng;

    // generate the ephemeral keypair
    let k = Scalar::random(&mut rng);
    let r = (ProjectivePoint::generator() * k).to_affine();

    // compute shared secret
    let shared_secret = *public_key * k;
    let shared_secret_bytes = shared_secret.to_bytes();

    // derive encryption key from shared secret
    let mut hasher = Sha256::new();
    hasher.update(shared_secret_bytes);
    let encryption_key = hasher.finalize();

    // Encrypt shellcode
    let encrypted_shellcode: Vec<u8> = shellcode
        .iter()
        .zip(encryption_key.iter().cycle())
        .map(|(&byte, &key)| byte ^ key)
        .collect();

    (EncodedPoint::from(&r), encrypted_shellcode)
}

fn decode_shellcode(
    encrypted_shellcode: &[u8],
    r: &EncodedPoint,
    private_key: &Scalar,
) -> Vec<u8> {
    // Compute shared secret
    let r_point = ProjectivePoint::from_encoded_point(r).expect("Invalid R point");
    let shared_secret = r_point * private_key;
    let shared_secret_bytes = shared_secret.to_bytes();

    // derive decryption key from shared secret
    let mut hasher = Sha256::new();
    hasher.update(shared_secret_bytes);
    let decryption_key = hasher.finalize();

    // Decrypt shellcode
    encrypted_shellcode
        .iter()
        .zip(decryption_key.iter().cycle())
        .map(|(&byte, &key)| byte ^ key)
        .collect()
}

>> Write the main function for operation

fn main() {
    // Example string => lets name it as shellcode ie (placeholder)
    let shellcode: &[u8] = b;"Hello, World!"

    // Generate ECC key pair
    let private_key = Scalar::random(&mut OsRng);
    let public_key = (ProjectivePoint::generator() * private_key).to_affine();

    println!("Private Key: {:?}", private_key);
    println!("Public Key: {:?}", public_key);

    // Convert AffinePoint to VerifyingKey (or PublicKey)
    VerifyingKey::from_encoded_point(&EncodedPoint::from(public_key))
        .expect("Invalid public key");

    let (r, encrypted_shellcode) = encode_shellcode(shellcode, &public_key);

    println!("Encrypted Shellcode: {:?}", encrypted_shellcode);

    // Decode the shellcode
    let decrypted_shellcode = decode_shellcode(&encrypted_shellcode, &r, &private_key);

    println!(
        "Decrypted Shellcode: {:?}",
     

Ref: github by Kavinarasu I
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🦑Free Deep Fake Models List :


https://github.com/MitchellX/deepfake-models

🦑10 awesome GitHub repos to learn and practice API Security

1. awesome-api-security
- https://lnkd.in/gKSX8Sj8

2. 30-API-security-tests
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3. API-Security-Checklist
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Ref: Ankita Gupta
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🦑In Active Directory Domain Services (ADDS), you can enforce Group Policy updates across all computers in your domain using the following command:

#security #tips

gpupdate /force

This ensures that any recent changes to Group Policies are applied immediately, enhancing security and compliance.

Ref: Milandeep kaur S.
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🦑New AI Jailbreak Meth:

Suicide Bot: New AI Attack Causes LLM to Provide Potential “Self-Harm” Instructions

https://youtu.be/AS2kJgOgyQ4


» Doc :
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@UndercodeCommunity
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🦑Top Malware Analysis Tools:

Ref: Harun Seker, CISSP
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🦑New (free) Course Launch- from the Open University Cisco ASC - focussing on UK Legislation for Digital and Cyber - it is currently a beta, however all educators and students may use this resource

🦑𝐇𝐨𝐰 𝐃𝐨𝐞𝐬 𝐚 𝐖𝐀𝐅 𝐰𝐨𝐫𝐤?
A Web Application Firewall (WAF) functions by monitoring and filtering HTTP/HTTPS traffic to and from web applications.

𝐊𝐞𝐲 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐜𝐨𝐦𝐩𝐨𝐧𝐞𝐧𝐭𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞: -

𝐓𝐫𝐚𝐟𝐟𝐢𝐜 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬: It scrutinizes incoming and outgoing requests to pinpoint anomalies or potential threats.

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𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞-𝐁𝐚𝐬𝐞𝐝 𝐃𝐞𝐭𝐞𝐜𝐭𝐢𝐨𝐧**This method involves recognizing established attack patterns based on known signatures.

**𝐁𝐞𝐡𝐚𝐯𝐢𝐨𝐫𝐚𝐥 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬: Leveraging machine learning algorithms, the WAF can identify suspicious behaviors that may deviate from normal activity. Unlike traditional antivirus solutions that rely solely on signature detection,
WAFs utilize more sophisticated detection mechanisms.

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𝐄𝐯𝐞𝐧𝐭 𝐋𝐨𝐠𝐠𝐢𝐧𝐠: Recording incidents for further investigation and analysis, facilitating continued improvement of security postures.

Image credit: Cyber Edition
Ref: Praveen Singh
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