Categories: Kali Linux

Token Reverser : Word List Generator To Crack Security Tokens

Token Reverser is a word list generator to crack security tokens.

Example Use Case

You are testing reset password function
Reset password token was sent to your email box (e.g. 582431d4c7b57cb4a3570041ffeb7e10)
You suppose, it is a md5 hash of the data you provided during registration process
You remember that on registration you entered the following data:
- First name: Foo
- Last name: Bar
- Email: foo.bar@example.com
- Birth date: 1985-05-23
- Phone: 202-555-0185
- Address: 3634 Forest Drive
In addition, you have an access to the following extra data:
- Application user ID: 74824
- Date of the reset password HTTP request (“Date” response header): Tue, 10 Mar 2020 17:12:59 GMT
You use Token Reverser to generate word list from the known data:

./token-reverser.py –date “Tue, 10 Mar 2020 17:12:59 GMT” Foo Bar foo.bar@example.com 1985-05-23 202-555-0185 “3634 Forest Drive” 74824 > words

You use hashcat to crack reset password token:

hashcat64.exe -m 0 582431d4c7b57cb4a3570041ffeb7e10 words
hashcat (v5.1.0) starting…
[…]
582431d4c7b57cb4a3570041ffeb7e10:74824!Foo!Bar!foo.bar@example.com!1583860379
Session……….: hashcat
Status………..: Cracked
Hash.Type……..: MD5
Hash.Target……: 582431d4c7b57cb4a3570041ffeb7e10
[…]

Now you know that reset password tokens are generated as follow:

md5(user ID!first name!last name!email!current timestamp)

Also Read – Pickl3 : Windows Active User Credential Phishing Tool

Usage

usage: token-reverser.py [-h] [-d DATE] [-o TIMESTAMP_OFFSET] [-s SEPARATORS]
data [data …]

Word list generator to crack security tokens v1.1

Positional arguments:
data data chunks

Optional arguments:
-h, –help show this help message and exit
-d DATE, –date DATE timestamp from this date will be used as an additional data chunk, example: Tue, 10 Mar 2020 14:06:36 GMT
-o TIMESTAMP_OFFSET, –timestamp-offset TIMESTAMP_OFFSET
how many previous (to timestamp from date) timestamps
should be used as an additional data chunk, default: 1
-s SEPARATORS, –separators SEPARATORS data chunks separators to check, default: ~`!@#$%^&*()_+-={}|[]\:”;'<>?,./ \t

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