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Mobile devs love pushing P2W mechanics while leaving the back door wide open.
After digging into the internals of Kingdom Rush Battles, it is clear that security was an afterthought. We are looking at a complete architectural failure that allows for everything from save manipulation to headless PvP botting. This is a technical breakdown of the backend, the encryption, and the protocols they use—or fail to use.
Architecture & Security Flaws:
The game currently has zero detection for root, emulators, or hooks. It is a perfect sandbox for anyone wanting to test headless clients or automated farming scripts.
Anyone else had a look at their CDN bundle structures yet? I am seeing some interesting metadata that could be used for a full card database scrape.
Drop your thoughts on the Photon implementation below.
After digging into the internals of Kingdom Rush Battles, it is clear that security was an afterthought. We are looking at a complete architectural failure that allows for everything from save manipulation to headless PvP botting. This is a technical breakdown of the backend, the encryption, and the protocols they use—or fail to use.
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Architecture & Security Flaws:
- Anti-Cheat Status: Photon Quantum's
is explicitly set to 0 in the production build. The anti-cheat is not just weak; it is physically disabled.Code:
ChecksumInterval - Server Authority: The server trusts the client implicitly. Match results including wins, stars, and trophies are submitted and accepted without any server-side validation.
- Save Encryption: They are using
with a hardcoded key baked directly into the binary. Decrypting and modifying local saves is trivial.Code:
DES-CBC - Authentication: JWTs are signed using
(symmetric signing). The same secret is used for both signing and verification, making the entire auth chain vulnerable if the secret is pulled from the assembly.Code:
HS256
PvP Protocol Reversed:
Fully reversed the Photon Quantum handshake, matchmaking SQL filters, and command serialization. It is possible to document every byte of the real-time communication.
AI Engine & Damage Pipeline:
Re-implemented the game's AI engine in C# as a headless simulation. We have also mapped the binary-level damage pipeline and
(Entity Component System) layout.
Exploit Vectors:
Over 27 documented vulnerabilities were found, including:
Fully reversed the Photon Quantum handshake, matchmaking SQL filters, and command serialization. It is possible to document every byte of the real-time communication.
AI Engine & Damage Pipeline:
Re-implemented the game's AI engine in C# as a headless simulation. We have also mapped the binary-level damage pipeline and
Code:
ECSExploit Vectors:
Over 27 documented vulnerabilities were found, including:
- Race conditions in chest farming.
- Leaderboard manipulation via direct API requests.
- Event ticket pipeline bypasses.
- Extraction of tower and hero stats from CDN bundles.
The game currently has zero detection for root, emulators, or hooks. It is a perfect sandbox for anyone wanting to test headless clients or automated farming scripts.
Anyone else had a look at their CDN bundle structures yet? I am seeing some interesting metadata that could be used for a full card database scrape.
Drop your thoughts on the Photon implementation below.
