How to Install and Use Sipvicious on Kali Linux [Complete Guide]

At its core, Sipvicious works as a small toolkit that lets you audit SIP servers and check how secure VoIP systems really are. Instead of just talking theory, in this post we’ll walk through how it works, look at the tools it offers, and then go over install Sipvicious on Kali Linux so you can try it yourself. And if you don’t want to run it on your own hardware, Eldernode has Linux VPS plans where you can test everything safely.

How Sipvicious Works

At its core, Sipvicious is just a set of small programs that poke around SIP-based VoIP systems. With it, you can do things like scan a network to spot SIP servers, list out the extensions they’re running, and even try weak passwords to see if authentication holds up when using Sipvicious in Kali Linux environment.

Each part of Sipvicious has its own job one tool handles scanning, another looks for extensions, while others focus on password checks or reporting.

1–> Svcrack

2–> Svcrash

3–> Svmap

4–> Svreport

5–> Svwar

In the continuation of this article from the Kali Linux training series, we intend to teach you How to Install Sipvicious and its tools on Kali Linux.

Installing Sipvicious on Kali Linux

To install the toolset on Kali Linux, just open your terminal and run the following command:

sudo apt install sipvicious

Now, we will review different tools of Sipvicious:

How to Use Svcrack tool of Sipvicious

Svcrack is one of the most commonly used parts of Sipvicious. It’s an online password-guessing tool for SIP services that tries different credentials against devices using SIP’s hashed authentication system. In simple terms, you can use it to test weak or guessable passwords on SIP devices within your Kali Linux setup.

To see the available options, run:

svcrack -h

How to Use Svcrash tool of Sipvicious

Within the Sipvicious suite, the Svcrash module plays a defensive role, answering requests in a way that can reveal weaknesses in outdated SIP servers. Its job is to respond to Svwar and Svcrack SIP requests in a way that causes older and unpatched SIP systems to crash. In practice, it can be used to test how resilient a SIP service is against malformed or unexpected traffic, especially when experimenting with this VoIP auditing toolkit in a Kali environment.

To view its options, run:

svcrash -h

How to Use Svmap tool of Sipvicious

Svmap works as a simple SIP scanner. You can point it at a network range, and it will look for active SIP devices that respond. This makes it useful for quickly mapping VoIP phones or PBX systems inside a network, especially while using Kali Linux.

To see the available options, just run:

svmap -h

How to Use Svreport tool of Sipvicious

Svreport manages sessions created by other tools and exports them to pdf, xml, csv and plain text. You can use the following command to run it specifically on Kali Linux:

svreport -h

How to Use Svwar tool of Sipvicious

Svwar identifies active extension lines in a PBX and can determine whether the extension line requires authentication or not. Run it by using the following command:

svwar -h

When to Use Sipvicious (Real-world Use Cases)

Most people who try out Sipvicious don’t just fire it up for fun. It usually shows up in pretty specific situations. For example, I’ve seen admins use it when they suspect their PBX might have weak extensions that anyone could guess. In training labs, students run Sipvicious on Kali Linux just to get a feel for how VoIP attacks look in practice it’s safer to break things in a lab than on a real network.

I’ve also run into cases where a quick scan with svmap exposed SIP phones nobody in the company even remembered were online. For example, running:

svmap 192.168.1.0/24

on a test network can quickly list all SIP devices that respond, which is often an eye-opener for admins. And on red team jobs, Sipvicious is one of those lightweight go-to tools to pressure-test passwords or map out extensions before moving deeper.

The key point: it belongs in controlled environments a lab, a throwaway VPS, or during an authorized test. That way, you find weak spots before somebody with bad intentions does.

Conclusion

So, that’s Sipvicious in a nutshell. It’s a small but powerful toolkit for poking at SIP-based VoIP systems scanning, listing extensions, and testing weak passwords. We also covered how to install and use Sipvicious toolkit on Kali Linux, which means you can set it up and start experimenting right away.

Once you get the hang of Sipvicious, you’ll probably want to push things a bit further. In my own tests, I’ve found SIPp handy for blasting out SIP traffic just to see how a server holds up. And tools like VoIPmonitor are great when you actually want to dig into call quality or see the flow of messages. Playing with them alongside Sipvicious in a small lab setup feels a lot closer to what happens on real VoIP networks messy, unpredictable, and much more interesting.