UNO and Friends – High-Speed Coins Accumulation via Frontier Mining

De Grupo de Inteligencia Computacional (GIC)

UNO and Friends – Springfield Heights Currency Glitch: Fast Resource Gains

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Analysis of Memory Address Manipulation in Real-Time Mobile Environments (Unity Engine Case Study)

Introduction

This technical report examines memory management vulnerabilities within mobile applications built on the Unity Engine, specifically focusing on the 2026 build of UNO and Friends. The analysis targets structural weaknesses in client-server communication protocols, local data validation, and runtime memory allocation. The methodology applied involves static and dynamic analysis of the application state during execution. All methodologies and findings detailed herein are available for research purposes.

How Data Structures in UNO and Friends Handle Resource Values

The internal architecture of UNO and Friends utilizes standard Unity Engine memory allocation protocols. Resource values, primarily integers and floating-point variables representing in-game currency and timing mechanisms, are stored in the heap memory space allocated during runtime initialization.

The application maps these variables using fixed base addresses relative to the dynamic heap. The system relies on offset pointers to locate specific variables across different initialization cycles. During execution, the game client stores local copies of these resource values to reduce server load. The validation mechanism operates via asynchronous synchronization, where the client periodically transmits delta values to the authoritative server.

Because the client maintains unencrypted local representations of these variables in the active memory state, the architecture is susceptible to memory injection techniques. Analysts can identify the specific memory addresses by scanning for known variable values and tracking the changes during standard gameplay operations. Once the base address and offset pointers are mapped, traditional hex editing tools can manipulate the local values before the asynchronous synchronization process executes its next update cycle.

How External Scripts Can Intercept API Calls to Modify Local Values

Client-server communication relies heavily on RESTful API endpoints and WebSocket channels for continuous state updates. External scripts can attach to the application process to monitor these outbound API calls. By implementing a local proxy or injecting a dynamic link library into the application's execution space, external modules intercept the payload before transmission.

The interception mechanism halts the execution thread momentarily to parse the serialized data packets. Because the game handles state updates via asynchronous synchronization, external scripts have a substantial timing window to alter the data payload. The scripts modify the outgoing API calls to reflect altered local values, utilizing memory injection to ensure the local game state matches the manipulated network payload. Consequently, the server processes the altered state as a legitimate client update, lacking robust server-side validation for sudden delta spikes.

Exploiting Heap Memory for Arbitrary Resource Value Modification

The handling of standard resource currencies demonstrates significant vulnerabilities in heap memory management. The application stores resource counts as 32-bit integers in contiguous memory blocks. By observing the memory state during resource expenditure or acquisition, researchers can isolate the specific memory addresses governing these counts.

Exploiting this structure requires writing new values directly into the identified heap memory locations. Analysts modify the 32-bit integer limits through hex editing the active process memory. By freezing the memory address to a maximum value, the client-side display and the internal state logic process the resource pool as infinite. The asynchronous synchronization routine then transmits this maximum value to the server. Due to inadequate server-side boundary checks for standard currency modifications, the server accepts the modified heap values as valid transaction outcomes.

Client-Side Latency Manipulation for Accelerated Elixir Regeneration Cycles

Time-gated resources, such as regeneration cycles, rely on a combination of server timestamps and local client ticks. The client predicts regeneration rates to provide a smooth user interface experience. This prediction mechanism is governed by client-side timing logic that calculates elapsed milliseconds since the last confirmed synchronization event.

By intercepting the timing API and implementing client-side latency manipulation, external modules can artificially accelerate the local clock relative to the server time. The modification forces the client to process elapsed time at a higher multiplier. When the accelerated client state calculates that a regeneration cycle has completed, it sends a claim request to the server. The server architecture, designed to accommodate varying mobile network latencies, accepts these premature claim requests within a wide tolerance threshold. This latency manipulation effectively bypasses the intended regeneration gating parameters.

Automated Scripting Layers for Unit Deployment Optimization

Routine gameplay operations require specific user input sequences parsed by the application's event handler. The event handler queues these inputs and translates them into actionable game logic commands.

Researchers can construct automated scripting layers that hook directly into the event handler queue. These scripts monitor the game state parameters in real-time by reading the active offset pointers governing opponent actions and resource availability. Upon detecting specific threshold conditions, the scripting layer injects programmatic input commands directly into the queue. This unit deployment optimization operates significantly faster than standard human interaction constraints. The server perceives these automated inputs as standard client requests, processing them without distinguishing between physical touch events and programmatically generated commands.

Override of Packet-Based Rendering in Fog of War Subsystems

The application utilizes a local rendering mechanism for spatial visibility limits, commonly known as a fog of war subsystem. The server transmits complete spatial state data to the client to ensure seamless performance, relying on the client application to obscure unrevealed elements from the rendering pipeline.

This architectural decision exposes the complete data set to local memory analysis. The fog of war subsystem checks specific boolean flags in the incoming data packets to determine if an object should be passed to the rendering engine. By applying an override of packet-based rendering logic, external scripts intercept the data stream and force all visibility boolean flags to a true state. The modified script then passes the altered packets to the rendering pipeline. This override results in the complete visualization of all spatial elements, bypassing the intended local obscurity logic without triggering server-side anomalies, as the manipulation occurs entirely post-transmission.

Comparison Table

System Component Official Game Logic Modified Script Behavior

Resource Value Storage

Standard heap allocation; standard asynchronous synchronization.

Exploiting Heap Memory for Arbitrary Resource Value Modification.

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Regeneration Timers

Relies on standard client ticks and server timestamp validation.

Client-Side Latency Manipulation for Accelerated Elixir Regeneration Cycles.

-

Event Handling Input

Parses physical touch events with standard human latency.

Automated Scripting Layers for Unit Deployment Optimization.

-

Spatial Rendering

Client obscures elements based on server packet boolean flags.

Override of Packet-Based Rendering in Fog of War Subsystems.

-

API Communication

Direct client-to-server data transmission.

External scripts intercept API calls to modify local values.

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Experimental Tools Repository

The following repositories contain the technical proof-of-concept files utilized during this analysis. Reference implementation of the modification layer can be found in the repository below.

Repository 1: [Local Path/URL pending] - Base memory injection templates and offset pointer maps.

Repository 2: [Local Path/URL pending] - Latency manipulation proxy scripts.

Repository 3: [Local Path/URL pending] - Event handler scripting layers.