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https://github.com/ariary/TrojanSourceFinder
🔎 Help find Trojan Source vulnerability in code 👀 . Useful for code review in project with multiple collaborators (CI/CD)
https://github.com/ariary/TrojanSourceFinder
ci-cd code-review golang scanner security trojan
Last synced: 3 months ago
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🔎 Help find Trojan Source vulnerability in code 👀 . Useful for code review in project with multiple collaborators (CI/CD)
- Host: GitHub
- URL: https://github.com/ariary/TrojanSourceFinder
- Owner: ariary
- License: mit
- Created: 2021-11-03T13:46:09.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2023-12-06T07:46:53.000Z (11 months ago)
- Last Synced: 2024-06-20T13:36:37.371Z (5 months ago)
- Topics: ci-cd, code-review, golang, scanner, security, trojan
- Language: Go
- Homepage:
- Size: 2.77 MB
- Stars: 46
- Watchers: 2
- Forks: 19
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-hacking-lists - ariary/TrojanSourceFinder - 🔎 Help find Trojan Source vulnerability in code 👀 . Useful for code review in project with multiple collaborators (CI/CD) (Go)
README
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 🔎
·
Track evil 👀
·
Trojan Source ❓
## Install
### With `go`
*> Via `go install`*
```shell
go install github.com/ariary/TrojanSourceFinder/cmd/tsfinder@latest
```
Make sure `$GOPATH` is in your `$PATH`
*> From source*
```shell
git clone https://github.com/ariary/TrojanSourceFinder
cd TrojanSourceFinder
make before.build
make build.tsfinder
```
If the command `make build.tsfinder` failed, try:
```shell
env GOOS=target-OS GOARCH=target-architecture
go build -o tsfinder cmd/main.go
```
### With `curl`
*> From release*
```shell
curl -lO -L 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 (Unicode bidirectional characaters)*
To detect Trojan source in file or directory *\*:
```shell
tsfinder [path]
```
### Detect only in text file
*> Source code files are likely text files. Withdraw binaries for scan could help to rule out false positives*
```shell
tsfinder -t [path]
```
Add `-v` help to see which file has been skipped by scan.
### Go further *(Homoglyph)*
Trojan Source is not new and isn't the only hazard. Another one is *"Homoglyph"*.(*[Kezako?](https://github.com/ariary/TrojanSourceFinder/blob/main/TrojanSource.md#homoglyph)*)
tsfinder help detecting them with `homoglyph` command:
```shell
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`:
```shell
tsfinder homoglyph [filename] --sibling [path]
```
*Functionality under development, mainly 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 Sources were, you could enable colored output with `-c` flag (also useful with directory scan):
```shell
tsfinder -c -v
```
## Demo
### Homoglyph
## Alternative
As mentioned by `@ioah86` [here](https://www.reddit.com/r/cybersecurity/comments/qlh5j9/my_take_on_trojan_source/), trojan source could also been detected w/ a one liner using grep.
The big difference is the output format and the exit status code (`tsfinder` exit with status code `0` if no Trojan source has been found, `1` otherwise; the opposite for `grep`)
Also, this one-liner does not resolve the homoglyph issue
| Goal | `tsfinder` | `grep` one-liner |
|:----------:|:-------------|:------|
| Scan all files + show lines| `tsfinder -v .` | `grep -arE $'(\u2066\|\u2067\|\u2068\|\u202A\|\u202B\|\u202D\|\u202E\|\u202C\|\u2069\|\u200E\|\u200F\|\u061C\|\u2066\|\u2067\|\u2068)'` |
| Scan only on human-readable files| `tsfinder -t .` | `grep -IrE $'(\u2066\|\u2067\|\u2068\|\u202A\|\u202B\|\u202D\|\u202E\|\u202C\|\u2069\|\u200E\|\u200F\|\u061C\|\u2066\|\u2067\|\u2068)'`|
|Exit with status code 1 if found|default|`[one-liner] && exit 1 \|\| exit 0`|