FiveM security notes
How malicious FiveM resources work - backdoors, PerformHttpRequest abuse, RCE, unsafe net events - and where static analysis stops. By the team behind FXScan.
Want to check a resource rather than read about one? The FiveM backdoor scanner traces these patterns for you, and the detection rules list every one of them.
RSS feedFiveM RCE: how remote code execution gets into a server
Remote code execution in FiveM rarely needs an exploit - it ships inside resources. The five paths to load() and ExecuteCommand, with Lua examples and fixes.
5 min readdetection, lua, rce, server-security
load and loadstring in FiveM: legitimate uses and backdoor tricks
load() turns a string into running Lua - the sink almost every FiveM backdoor ends in. Legitimate uses, the disguises backdoors use, and how to review it.
4 min readdetection, lua, rce, obfuscation
PerformHttpRequest security: when a FiveM HTTP call becomes a backdoor
PerformHttpRequest is in thousands of honest FiveM resources and almost every backdoor. How to tell them apart, with Lua examples and a review checklist.
6 min readdetection, lua, rce, exfiltration
What a FiveM security scan cannot tell you
A clean FiveM resource scan means no rule matched, not that it is safe. Exactly where static analysis stops and what you still need to check.
3 min readmethodology, limits
Unsafe net events: the most common FiveM vulnerability is not a backdoor
The most common FiveM exploit: a server event that trusts the client. What an unsafe RegisterNetEvent handler looks like and the server-side fix.
3 min readdetection, lua, server-security
Anatomy of a FiveM backdoor: fetch, decode, execute
How FiveM backdoors work in real Lua: PerformHttpRequest fetches a payload, a decoder hides it, load() runs it. How to spot each step by hand.
3 min readdetection, lua, rce