"Is this coupon real?" Introducing a case study on preventing payment forgery and reward abuse with LIAPP

"Is this coupon real?" Introducing a case study on preventing payment forgery and reward abuse with LIAPP

In the digital transformation era, O2O (Online to Offline) services have become deeply embedded in our daily lives. From delivery apps, taxi calls, accommodation reservations, to shared mobility—most O2O platforms offer benefits such as discount coupons, accumulated points, and promotional rewards to attract users. However, this is where security vulnerabilities arise. There are endless cases of some users or hackers modifying apps or manipulating rewards to infinitely repeat discounts or forge points.

To prevent such financial losses and system abuse, there is a solution that many O2O companies have chosen. It is the 'mobile security service LIAPP'.

Today, we will introduce in detail a case study where payment forgery and reward abuse were actually prevented through LIAPP.

Common reward abuse methods in O2O services

The method of exploiting O2O apps is not technically difficult. Anyone with a publicly available rooting tool or memory manipulation app can do the following:
 • Use discount coupons repeatedly
 • Unlimited payments through point manipulation
 • Attempt to cancel payments by blocking the network after app payment
 • Repeatedly execute reward payment routines to create unlimited points
 • Disable specific event conditions by modifying app code

These actions can cause losses of millions to tens of millions of won for even a single user, destroy fairness between users, and have a major impact on brand reliability.

LIAPP, a powerful security solution for O2O apps

LIAPP is a security solution that can be easily applied within mobile apps,
providing various abnormal behavior detection and blocking functions that can occur on the client side.
In particular, it has optimized protection functions for reward manipulation, payment forgery, and coupon abuse that frequently occur in O2O services.

Key security features
 • Memory manipulation detection: Detect attempts to change memory values at runtime
 • Rooting detection and blocking: Restrict app execution on jailbroken/rooted devices
 • Debugging and hooking blocking: Prevents analysis in advance using Frida, Xposed, etc.
 • Integrity check: Checks for app code modification and automatically terminates the app
 • Network bypass detection: Detects arbitrary blocking or modification of communication with the payment server

Actual application case: Prevents coupon/point abuse

A domestic mid-sized franchise-based delivery O2O platform has been suffering from coupon abuse and point manipulation issues since its service launch.

Problem situation
 • New member coupon 5,000 won → Rooting users repeatedly create new accounts and use coupons infinitely
 • Referral reward system → arbitrarily changes the referral number by manipulating the app
 • A specific hacker manipulated points from 0 to 10,000 to complete payment

As a result, reward financial losses amounting to tens of millions of won per month occurred, and internal audits were unable to track all related activities.

Countermeasures: Introduction of LIAPP
 • Implemented rooting detection and execution blocking functions in apps
 • Strengthened memory integrity check when granting/using points
 • Encrypted and prevented hooking of referral system access functions
 • Automatically terminated app after debugging detection when applying coupons

As a result
 • Blocked more than 90% of malicious rooting users
 • Reduced number of cases of point manipulation to 0
 • Sharp decrease in inquiries about coupons and objections through customer service center
 • Stabilized operation of reward system

Will there be no inconvenience for users? Business can continue only when security is maintained

Many security systems have difficulty maintaining a balance between enhanced security and user convenience.
However, LIAPP is designed to apply real-time security with minimal performance load so that general users can use the app without any inconvenience.
In addition, even in cases where abnormal behavior is determined, guided security responses are possible through warning messages or execution restrictions within the app.

As the number of users of O2O services increases, security threats also increase exponentially. Even if just one reward exploitation routine is discovered, malicious users who replicate it will increase in an instant. Now, a security strategy that focuses on preemptive blocking, not post-response, is essential. LIAPP is an advanced mobile security solution that detects real-time threats and blocks malicious behavior before it even occurs.

Are you still putting the security of your O2O app on the back burner? Now, completely block payment forgery and reward abuse. LIAPP protects your business profits.

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