GitBook: [#3417] No subject

SUMMARY.md

@@ -470,6 +470,7 @@
 * [File Upload](pentesting-web/file-upload/README.md)
   * [PDF Upload - XXE and CORS bypass](pentesting-web/file-upload/pdf-upload-xxe-and-cors-bypass.md)
 * [Formula/Doc/LaTeX Injection](pentesting-web/formula-doc-latex-injection.md)
+* [HTTP Connection Request Smuggling](pentesting-web/http-connection-request-smuggling.md)
 * [HTTP Request Smuggling / HTTP Desync Attack](pentesting-web/http-request-smuggling/README.md)
   * [Request Smuggling in HTTP/2 Downgrades](pentesting-web/http-request-smuggling/request-smuggling-in-http-2-downgrades.md)
 * [HTTP Response Smuggling / Desync](pentesting-web/http-response-smuggling-desync.md)

c2/cobalt-strike.md

@@ -171,3 +171,33 @@ beacon> socks 1080
 
 # SSH connection
 beacon> ssh 10.10.17.12:22 username password</code></pre>
+
+## Avoiding AVs
+
+### Artifact Kit
+
+Usually in `/opt/cobaltstrike/artifact-kit` you can find the code and pre-compiled templates (in `/src-common`) of the payloads that cobalt strike is going to use to generate the binary beacons.
+
+Using [ThreatCheck](https://github.com/rasta-mouse/ThreatCheck) with the generated backdoor (or just with the compiled template) you can find what is making defender trigger. It's usually a string. Therefore you can just modify the code that is generating the backdoor so that string doesn't appear in the final binary.
+
+After modifying the code just run `./build.sh` from the same directory and copy the `dist-pipe/` folder into the Windows client in `C:\Tools\cobaltstrike\ArtifactKit`.
+
+```
+pscp -r root@kali:/opt/cobaltstrike/artifact-kit/dist-pipe .
+```
+
+Don't forget to load the aggressive script `dist-pipe\artifact.cna` to indicate Cobalt Strike to use the resources from disk that we want and not the ones loaded.
+
+### Resource Kit
+
+The ResourceKit folder contains the templates for Cobalt Strike's script-based payloads including PowerShell, VBA and HTA.
+
+Using [ThreatCheck](https://github.com/rasta-mouse/ThreatCheck) with the templates you can find what is defender (AMSI in this case) not liking and modify it:
+
+```
+.\ThreatCheck.exe -e AMSI -f .\cobaltstrike\ResourceKit\template.x64.ps1
+```
+
+Modifying the detected lines one can generate a template that won't be caught.
+
+Don't forget to load the aggressive script `ResourceKit\resources.cna` to indicate Cobalt Strike to luse the resources from disk that we want and not the ones loaded.

pentesting-web/file-upload/README.md

@@ -110,7 +110,7 @@ The `.inc` extension is sometimes used for php files that are only used to **imp
 
 If you can upload a XML file into a Jetty server you can obtain [RCE because **new \*.xml and \*.war are automatically processed**](https://twitter.com/ptswarm/status/1555184661751648256/photo/1)**.** So, as mentioned in the following image, upload the XML file to `$JETTY_BASE/webapps/` and expect the shell!
 
-![](<../../.gitbook/assets/image (1) (3).png>)
+![](<../../.gitbook/assets/image (1) (3) (1).png>)
 
 ## **wget File Upload/SSRF Trick**
 

pentesting-web/http-connection-request-smuggling.md

@@ -0,0 +1,85 @@
+# HTTP Connection Request Smuggling
+
+<details>
+
+<summary><strong>Support HackTricks and get benefits!</strong></summary>
+
+Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
+
+Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
+
+Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
+
+**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
+
+**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
+
+</details>
+
+## Connection state attacks <a href="#state" id="state"></a>
+
+### **First-request validation**
+
+Reverse proxies often use the **Host header** to identify **which back-end server to route** each request to, and have a whitelist of hosts that people are **allowed to access.**
+
+However, some proxies only apply this **whitelist to the first request sent** over a given connection. This means attackers can gain **access to internal** websites by issuing a **request to an allowed** destination, **followed** by one for the **internal site** down the same connection:
+
+```
+GET / HTTP/1.1
+Host: redacted
+
+GET / HTTP/1.1
+Host: intranet.redacted
+```
+
+Mercifully, this **mistake is quite rare**.
+
+### **First-request routing**
+
+First-request routing occurs when the front-end uses the **first request's Host header to decide** which back-end to route the request to, and then **routes all subsequent requests** from the same client connection down the **same back-end connection**.
+
+```
+GET / HTTP/1.1
+Host: example.com
+
+POST /pwreset HTTP/1.1
+Host: psres.net
+```
+
+This could be chained with [**Host header attacks**](https://portswigger.net/web-security/host-header) like password reset poisoning, [**web cache poisoning**](https://portswigger.net/web-security/web-cache-poisoning), and gaining access to other virtual hosts.
+
+{% hint style="info" %}
+You can scan for these two flaws using the 'connection-state probe' option in HTTP Request Smuggler.
+{% endhint %}
+
+## CL.0 browser-compatible desync
+
+This vulnerability occurs when the **Content Length** (CL) header is being completely **ignored** by the **backend server**. Then, the back-end treats the **body** as the **start of the second request's method**. Ignoring the CL is equivalent to treating it as having a value of 0, so this is a CL.0 desync - a [known](https://i.blackhat.com/USA-20/Wednesday/us-20-Klein-HTTP-Request-Smuggling-In-2020-New-Variants-New-Defenses-And-New-Challenges.pdf) but lesser-explored attack class.
+
+![](../.gitbook/assets/image.png)
+
+The attack was possible because the back-end server simply **wasn't expecting a POST request**.
+
+{% hint style="warning" %}
+Note that this vulnerability is being **triggered** by a completely **valid**, specification-compliant **HTTP request**. This meant the **front-end has zero chance of protecting** against it, and it could even be triggered by a browser.
+{% endhint %}
+
+
+
+
+
+<details>
+
+<summary><strong>Support HackTricks and get benefits!</strong></summary>
+
+Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
+
+Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
+
+Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
+
+**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
+
+**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
+
+</details>

pentesting-web/http-request-smuggling/README.md

@@ -1,7 +1,5 @@
 # HTTP Request Smuggling / HTTP Desync Attack
 
-## HTTP Request Smuggling / HTTP Desync Attack
-
 <details>
 
 <summary><strong>Support HackTricks and get benefits!</strong></summary>

pentesting-web/http-request-smuggling/request-smuggling-in-http-2-downgrades.md

@@ -1,7 +1,5 @@
 # Request Smuggling in HTTP/2 Downgrades
 
-## Request Smuggling in HTTP/2 Downgrades
-
 <details>
 
 <summary><strong>Support HackTricks and get benefits!</strong></summary>

pentesting-web/http-response-smuggling-desync.md

@@ -1,7 +1,5 @@
 # HTTP Response Smuggling / Desync
 
-## HTTP Response Smuggling / Desync
-
 <details>
 
 <summary><strong>Support HackTricks and get benefits!</strong></summary>

windows-hardening/active-directory-methodology/external-forest-domain-one-way-outbound.md

@@ -93,7 +93,7 @@ Sometimes when creating a trust relationship, a password must be typed in by the
 
 The cleartext password can be used to perform regular authentication as the trust account, an alternative to requesting a TGT using the Kerberos secret key of the trust account. Here, querying root.local from ext.local for members of Domain Admins:
 
-![](../../.gitbook/assets/image.png)
+![](<../../.gitbook/assets/image (1).png>)
 
 ## References