Background – The SAM
The Windows registry contains a lot of valuable information for cyber investigators and security analysts alike. The registry lives mainly in C:System32config for the local machine, with user specific registry items contained in each user’s profile in a hidden file named NTUSER.DAT. The SAM file is part of the local machine hive and it is where you’ll be able to find information regarding user accounts. This is also where account credentials are stored.
What is an NTLM hash?
When trying to bruteforce these (In 16 bytes form or 32) I get either wrong cracked passwords or 'Exhausted'. Always, with some certain hashes. Let's say this hash. Jan 26, 2017 If the third field has anything other than that aad3b string, you have an LM hash. This format is extremely weak for a number of different reasons, and John is very good at cracking it. Crack Lm Hash Nt Hash Decrypt Prolapse The Italian Flag Rar Download Virtual Villagers 5 Free Full Version Pc Sims 2 Crack File Pinochio Desene Animate Dublat In Romana Download Flip Q Serial Keygen Ws Reimage License Key Keygen Generator For Medal Of Honor Emg 81 60 Active Pickups Battery. This website allows you to decrypt, if you're lucky, your ntlm hashes, and give you the corresponding plaintext. We proceed by comparing your hash with our online database, which contains more than 1.000.000.000 different hashes. Pwdump7 hash.txt. As you can see below the hashes are extracted and stored in the file named hash.txt. Now once you have the hashes you can use john the ripper or hash suite to crack the passwords. If you want to crack the password using an android device then you can also use hash suite droid. I have written articles on each do read them.
New Technology LAN Manager, or NTLM is a protocol suite in Windows that maintains authentication. The NTLM hash is unsalted, meaning that it is not modified with a known value. This enables the NTLM hash to be used in a practice called “Pass the Hash” where the hash value is used for authentication directly. The NTLM hash appears in the following format:
The information can be broken down into three sections. The first shows a username followed by a colon and double quotes. The colon and quotes can be safely ignored as they are not needed to crack the password. A user’s relative identifier would appear in this spot (500 for Administrator, 501 for Guest, 1000 for first user created account). The next string of characters is the LM hash and is only include for backwards compatibility. The last section is the most important for cracking, this is the NT hash. The NT hash is commonly referred to as the NTLM hash, which can be confusing at the start.
How do you get the NTLM hash?
The answer to this depends on the target system state. Mimikatz is likely the most popular tool for the job. If it is powered down, then the targets hard drive can be removed and mounted (ideally with a write blocker) and the registry files can be accessed. In this scenario, Mimikatz will be used against the SAM file and the SYSTEM file. An example of the command can be seen below.
Defeating the Hash
Once the NTLM hash has been obtained, there are several methods of determining the plain text password. Bear in mind that cryptographic hashes are one-way-functions that cannot be decoded. In order to determine the actual password, we must compare the hashes of known strings to determine if it is a match to the sample.
Cracking
Depending on the hardware of a computer, this method could take anywhere from hours to weeks. I will cover the process I took to begin cracking the hashes. There are various tools available, but I will be focusing a tool named Hashcat due to familiarity. Hashcat, is an opensource password hashing suite that can leverage the power of graphics cards to aid in the calculations. Hashcat itself supports cracking via a dictionary, bruteforce, or a combination there-of. A straight dictionary attack would be the fastest method, but it would require that the password be in the dictionary verbatim. A collection of wordlists can be found on GitHub with the correct search term. A bruteforce method would be slow, but as long as the mask matches it is a more inclusive search method.
![Hash Hash](https://mk0resourcesinfm536w.kinstacdn.com/wp-content/uploads/012513_1511_PasswordCra3.png)
In the above screenshot, I chose to use a GUI frontend on Hashcat for demonstration purposes. I’ll be starting a bruteforce attack assuming the password is between 1 and 9 characters in length and has uppercase, lowercase, and/or numbers in it. This can be seen by the character set #1 with ?l?d?u. The question mark here is used as a wildcard.
Hashcat will then try all the possible solutions to match the sample hash. In my case it is working at 7466MH/s (or 7,466,000,000 hashes a second). Even with the speed, this will take time.
There must be a better way
I am a firm believer that success in this field has a big part to do with being able to recognize when someone has already done the hard work for you. Most of the time you can find the answers you are looking for by asking the right question to the all-knowing Google. A quick search for NTLM hash cracker will return with a website called hashkiller.co.uk, which just happens to be who created the GUI for Hashcat.
Here, we can take the NT hash from the provided list and see if they have been seen before. I’ll be using the following as an example. The NT hash is highlighted.
Perfect, the password to the user account “cmonster” is “cookie”. This method works for most of the hashes found on the list. There are a few that are not found. I have listed them below.
Crack Lm Hash Nt Hash Decryption
You may have noticed that the hash for “Guest” and “victim” are identical, they must have the same password. We find one, we find both. My thought process for this part of the challenge was to return to Google and ask a different question. Knowing that a hash is a unique string, I figured it might be worth while to paste the hash directly into the search box and see what it returns. Perhaps it’s referenced elsewhere.
![Crack Lm Hash Nt Hash Decrypt Crack Lm Hash Nt Hash Decrypt](/uploads/1/1/9/5/119589824/795348865.jpg)
I stumbled upon the answer in the very first result. It became very obvious to me.
The account I was attempting to find the password for was Guest. The Guest account (sid 501) in Windows does not have a password by default, so it would make sense that it is blank. This must also be true for the victim account.
Unfortunately, I was unable to find any matches to two of the hashes using the easy method. My computer will be set to manual crack these two hashes over the next 8 weeks.
Unfortunately, I was unable to find any matches to two of the hashes using the easy method. My computer will be set to manual crack these two hashes over the next 8 weeks.
Below are the hashes that were able to be defeated using simple research and online tools.
Hashes.com is a hash lookup service. This allows you to input an MD5, SHA-1, Vbulletin, Invision Power Board, MyBB, Bcrypt, Wordpress, SHA-256, SHA-512, MYSQL5 etc hash and search for its corresponding plaintext ('found') in our database of already-cracked hashes.
It's like having your own massive hash-cracking cluster - but with immediate results!
We have been building our hash database since August 2007.
We are not cracking your hash in realtime - we're just caching the hard work of many cracking enthusiasts over the years.
The MD5 message-digest algorithm is a widely used hash function producing a 128-bit hash value. Although MD5 was initially designed to be used as a cryptographic hash function, it has been found to suffer from extensive vulnerabilities. It can still be used as a checksum to verify data integrity, but only against unintentional corruption. It remains suitable for other non-cryptographic purposes, for example for determining the partition for a particular key in a partitioned database. The weaknesses of MD5 have been exploited in the field, most infamously by the Flame malware in 2012. The CMU Software Engineering Institute considers MD5 essentially cryptographically broken and unsuitable for further use. MD5 Decrypt.
In cryptography, SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest – typically rendered as a hexadecimal number, 40 digits long. It was designed by the United States National Security Agency, and is a U.S. Federal Information Processing Standard. Since 2005 SHA-1 has not been considered secure against well-funded opponents, and since 2010 many organizations have recommended its replacement by SHA-2 or SHA-3. Microsoft, Google, Apple and Mozilla have all announced that their respective browsers will stop accepting SHA-1 SSL certificates by 2017. SHA1 Decrypt.
The MySQL5 hashing algorithm implements a double binary SHA-1 hashing algorithm on a users password. MySQL Decrypt.
Crack Password Hash Online
NT (New Technology) LAN Manager (NTLM) is a suite of Microsoft security protocols that provides authentication, integrity, and confidentiality to users. NTLM is the successor to the authentication protocol in Microsoft LAN Manager (LANMAN), an older Microsoft product. The NTLM protocol suite is implemented in a Security Support Provider, which combines the LAN Manager authentication protocol, NTLMv1, NTLMv2 and NTLM2 Session protocols in a single package. Whether these protocols are used or can be used on a system is governed by Group Policy settings, for which different versions of Windows have different default settings. NTLM passwords are considered weak because they can be brute-forced very easily with modern hardware. NTLM Decrypt.
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA). They are built using the Merkle–Damgård structure, from a one-way compression function itself built using the Davies–Meyer structure from a (classified) specialized block cipher. SHA-2 includes significant changes from its predecessor, SHA-1. The SHA-2 family consists of six hash functions with digests (hash values) that are 224, 256, 384 or 512 bits: SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256. SHA256 Decrypt.