TrojanSourceFinder

TrojanSourceFinder helps developers detect “Trojan Source” vulnerability in source code.

Trojan Source vulnerability allows an attacker to make malicious code appear innocent.
In general, the attacker tries to lure by passing his code off as a comment (visually). It is a serious threat because it concerns many languages. Projects with multiple “untrusted” sources could be concerned


Detect evil ๐Ÿ”Ž
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Track evil ๐Ÿ‘€
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Trojan Source โ“

Install

With go

> Via go install

go install github.com/ariary/cmd/[email protected]

Make sure $GOPATH is in your $PATH

> From source

git clone https://github.com/ariary/TrojanSourceFinder
cd TrojanSourceFinder
make before.build
make build.tsfinder

If the command make build.tsfinder failed, try:

env GOOS=target-OS GOARCH=target-architecture
go build -o tsfinder cmd/main.go

With curl

> From release

curl -lO https://github.com/ariary/TrojanSourceFinder/releases/latest/download/tsfinder && chmod +x tsfinder

Detect Trojan Source

> Help the detection of Trojan source for manual code review or with CI/CD pipelines

To detect Trojan source in file or directory <path>:

tsfinder [path]

Go further (Homoglyph)

Trojan Source is not new and isn’t the only hazard. Another one is “Homoglyph”.(Kezako?)

tsfinder help detecting them with homoglyph command:

tsfinder homoglyph [filename] [flags]

You could see if there is a sibling (ie word with same “skeleton”) for the homographs found in path using the flag --sibling:

tsfinder homoglyph [filename] --sibling [path] 

Functionality under development, depending on other project

Visualize Trojan Source

> Visualize how the code is really interpreted by machines/compiler

tsfinder is deliberately not very verbose. By default, it will only output if Trojan Source code has been detected. To have more verbosity and visualize the dangerous line add the flag -v

To better see where Trojan Source were you have for colored output with -c flag (also useful with directory scan):

tsfinder -c -v <directory>

Demo

demo

Homoglyph

demo

GitHub

View Github