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In a ping response TTL:\
127 = Windows\
254 = Cisco\
Lo demás,algunlinux
$1$- md5\
$2$or $2a$ - Blowfish\
$5$- sha256\
$6$- sha512
If you do not know what is behind a service, try to make and HTTP GET request.
**UDP Scans**\
nc -nv -u -z -w 1 \ 160-16
An empty UDP packet is sent to a specific port. If the UDP port is open, no reply is sent back from the target machine. If the UDP port is closed, an ICMP port unreachable packet should be sent back from the target machine.\
UDP port scanning is often unreliable, as firewalls and routers may drop ICMP\
packets. This can lead to false positives in your scan, and you will regularly see\
UDP port scans showing all UDP ports open on a scanned machine.\
o Most port scanners do not scan all available ports, and usually have a preset list\
of “interesting ports” that are scanned.
# CTF - Tricks
In **Windows** use **Winzip** to search for files.\
**Alternate data Streams**: _dir /r | find ":$DATA"_\
```
binwalk --dd=".*" #Extract everything
binwalk -M -e -d=10000 suspicious.pdf #Extract, look inside extracted files and continue extracing (depth of 10000)
```
## Crypto
**featherduster**\
**Basae64**(6—>8) —> 0...9, a...z, A…Z,+,/\
**Base32**(5 —>8) —> A…Z, 2…7\
**Base85** (Ascii85, 7—>8) —> 0...9, a...z, A...Z, ., -, :, +, =, ^, !, /, \*, ?, &, <, >, (, ), \[, ], {, }, @, %, $, #\
**Uuencode** --> Start with "_begin \ \_" and weird chars\
**Xxencoding** --> Start with "_begin \ \_" and B64\
\
**Vigenere** (frequency analysis) —> [https://www.guballa.de/vigenere-solver](https://www.guballa.de/vigenere-solver)\
**Scytale** (offset of characters) —> [https://www.dcode.fr/scytale-cipher](https://www.dcode.fr/scytale-cipher)
**25x25 = QR**
factordb.com\
rsatool
Snow --> Hide messages using spaces and tabs
# Characters
%E2%80%AE => RTL Character (writes payloads backwards)
Support HackTricks and get benefits!
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- 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 by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**