Anti-Dump

Anti-dump prevents an attacker from extracting your .NET application out of memory while it runs, closing a path that bypasses static protections entirely.

.NET

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See it in ByteHide Shield

TL;DR

Static protections protect the application on disk. But while it runs, it is loaded into memory, and an attacker can try to dump that memory to recover an unprotected copy. Anti-dump is a runtime self-protection that detects and blocks memory dumping, closing that path.

Definition

What is anti-dump?

Anti-dump is a protection that prevents an application from being extracted from memory while it is running. It addresses a specific bypass: even when code is obfuscated on disk, the runtime needs a workable form in memory to execute it.

An attacker who cannot make progress against the file on disk can let the application start, then dump its memory to capture that workable form. Memory dumping is a common way to defeat static-only protection.

Anti-dump closes this path. It is a runtime, RASP-style protection that detects dumping attempts and interferes with them, so the in-memory image cannot be cleanly extracted and reused.

Mechanism

How anti-dump works

Anti-dump combines several runtime techniques:

Dump attempt detection. The application detects when a process is attempting to read or capture its memory.
Memory protection. The in-memory layout is structured so a captured dump is not a usable, complete assembly.
Configurable response. On detection, the application can terminate, corrupt the dump, or alter behavior.

The application runs normally, but its in-memory form cannot be cleanly lifted out.

Example

Anti-dump example

The same key-loading method. Anti-dump changes what an attacker can lift out of memory while it runs.

Without anti-dump

An attacker lets your obfuscated application start, dumps its process memory, and recovers a workable copy of the assembly.

With anti-dump

The same attempt is detected, the dump is incomplete or corrupted, and the captured memory is not a usable assembly.

Without anti-dumpKeyVault.cs

public byte[] LoadMasterKey()
{
    return SecureStorage.Read(KeyId);
}

With anti-dumpKeyVault.cs

public byte[] LoadMasterKey()
{
    return SecureStorage.Read(KeyId);
}

Use cases

When to use anti-dump

Anti-dump matters most when your .NET application:

Is protected with obfuscation that you do not want bypassed through memory.
Contains sensitive logic an attacker would try to recover from a running process.
Must resist runtime extraction, not only static analysis.

It pairs with anti-debugging and anti-tamper as a runtime hardening layer: together they defend the application while it executes, not only on disk.

Platform availability

Anti-dump and the .NET platform

.NET
Anti-dump protection against memory extraction of the running assembly. It is a runtime hardening protection within the .NET Shield set.

Frequently asked questions

What is anti-dump?

Anti-dump is a .NET runtime self-protection that detects and blocks attempts to extract a running application from memory, closing a path attackers use to bypass static protections.

Does anti-dump affect performance?

The runtime cost is minimal. Anti-dump checks are lightweight and do not affect normal execution.

Why is anti-dump needed if my code is obfuscated?

Obfuscation protects the code on disk. While the application runs, a workable form exists in memory. Anti-dump prevents that in-memory form from being extracted.

Can anti-dump be bypassed?

A determined attacker can attempt advanced dumping techniques, which is why anti-dump is layered with anti-debugging and obfuscation. The goal is to make extraction impractical.

Which platforms support anti-dump?

ByteHide Shield provides anti-dump for .NET.