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https://github.com/stanford-esrg/lzr
LZR quickly detects and fingerprints unexpected services running on unexpected ports.
https://github.com/stanford-esrg/lzr
go golang internet-wide-scanning ipv4 network port-scan port-scanner port-scanning scanning security security-tools zgrab zmap
Last synced: 20 days ago
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LZR quickly detects and fingerprints unexpected services running on unexpected ports.
- Host: GitHub
- URL: https://github.com/stanford-esrg/lzr
- Owner: stanford-esrg
- License: apache-2.0
- Created: 2020-02-24T21:50:51.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2024-11-02T04:13:23.000Z (about 1 month ago)
- Last Synced: 2024-11-14T17:03:11.755Z (28 days ago)
- Topics: go, golang, internet-wide-scanning, ipv4, network, port-scan, port-scanner, port-scanning, scanning, security, security-tools, zgrab, zmap
- Language: Go
- Homepage:
- Size: 75.3 MB
- Stars: 153
- Watchers: 11
- Forks: 32
- Open Issues: 6
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
LZR
=========
LZR quickly detects and fingerprints unexpected services running on unexpected ports by working with [ZMap](https://github.com/zmap/zmap). LZR can detect up to 18 unique protocols simultaneously with just two extra packets and can fingerprint over 35 different protocols.
To learn more about LZR's system and performance, check out the original [paper](https://lizizhikevich.github.io/assets/papers/lzr.pdf) appearing at [USENIX Security '21](https://www.usenix.org/conference/usenixsecurity21). To use LZR to fingerprint services across all 65K ports, check out [GPS](https://github.com/stanford-esrg/gps).
## Building
Install and set up [ZMap](https://github.com/zmap/zmap). If also performing full L7 handshakes, set up [ZGrab](https://github.com/zmap/zgrab2).
Set up `$GOPATH` (see https://golang.org/doc/code.html).
```
$ go get github.com/stanford-esrg/lzr
$ cd $GOPATH/src/github.com/stanford-esrg/lzr
```
LZR intercepts connections which ZMap opens; in order to ensure that the kernel does not interfere with LZR, LZR requires a source-ip to be specified for which the kernel drops all RSTs for traffic targeted to the source-ip. The chosen source-ip—which both ZMap and LZR will use—should be passed in as a parameter to make, so the appropriate iptables rule can be set.
```
$ make all source-ip=256.256.256.256/32
```
## Usage
To fingerprint unexpected services on an random port (9002):
```
sudo zmap --target-port=9002 --output-filter="success = 1 && repeat = 0" \
-f "saddr,daddr,sport,dport,seqnum,acknum,window" -O json --source-ip=$source-ip | \
sudo ./lzr --handshakes http,tls
```
To complete full L7 handshakes of unexpected services on an random port (9002), substitute ``port=x`` in ``etc/all.ini`` with ``port=9002`` and run the following command:
```
sudo zmap --target-port=9002 --output-filter="success = 1 && repeat = 0" \
-f "saddr,daddr,sport,dport,seqnum,acknum,window" -O json --source-ip=$source-ip | \
sudo ./lzr --handshakes wait,http,tls -feedZGrab | \
zgrab multiple -c etc/all.ini
```
To scan a custom list of IP:Port (i.e., using LZR rather than ZMap to open connections):
```
The expected input format of an example services list is:
```
1.1.1.1:1234
2.2.2.2:80
```
## Flags
```
$ ./lzr --help
Usage of ./lzr:
-cpuprofile string
write cpu profile to file
-d debug printing on
-f string
json results output file name (default "default_20210227212802.json")
-feedZGrab
send to zgrab ip and fingerprint
-forceAllHandshakes
Complete all handshakes even if data is returned early on. This also turns off HyperACKtive filtering.
-gatewayMac string
gateway Mac Address in format xx:xx:xx:xx:xx:xx
-haf int
number of random ephemeral probes to send to filter ACKing firewalls
-handshakes string
handshakes to scan with (default "http")
-memprofile string
write memory profile to this file
-priorityFingerprint string
fingerprint to prioritize when multiple match
-pushDataOnly
Don't attach data to ack but rather to push only
-rn int
number of data packets to re-transmit (default 1)
-rt int
number of seconds until re-transmitting packet (default 1)
-sendInterface string
network interface to send packets on (default "ens8")
-sendSYNs
will read input from stdin containing a newline-delimited list of ip:port
-sourceIP string
source IP to send syn packets with (if using sendSYNs flag)
-t int
number of seconds to wait in timeout queue for last retransmission (default 5)
-w int
number of worker threads for each channel (default 1)
```
#### Caveats for specific features
Acking Firewall Filtering (-haf): If a host responds both on the expected port and on the random ephemeral port, whichever response comes first will dictate whether the host is marked as having an ACKing firewall.
## LZR's Algorithm
## License and Copyright
Copyright 2020 The Board of Trustees of The Leland Stanford Junior University
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.