Cracked passwords from the alleged ‘Egyptian hacker’ Adobe breach – Naked Security
Blog PDF Password Recovery Pro user manual PDF Password Cracker Professional edition allows to search for “owner” and “user” passwords with brute-force and dictionary attacks, effectively optimized for speed however, don’t expect to recover long passwords in a reasonable time with these attacks. In addition, it has Key search attack, which guarantees the decryption regardless the password length and complexity of PDF files that use bit encryption the attack takes about days on fast CPU systems. The standard security provided by PDF consists of two different methods and two different passwords. If only owner password is set, decryption is being done instantly; decrypted file can be opened in any PDF viewer e. Adobe Acrobat Reader without any restrictions, i.
Adobe Reader 89Eaf Id And 7A1E2 Password Crack
As far as anyone knew, including Adobe, it affected about 3,, customer records, which made it sound pretty bad right from the start. But worse was to come, as recent updates to the story bumped the number of affected customers to a whopping 38,, We took Adobe to task for a lack of clarity in its breach notification. Our complaint One of our complaints was that Adobe said that it had lost encrypted passwords, when we thought the company ought to have said that it had lost hashed and salted passwords.
As we explained at the time: Today’s norms for password storage use a one-way mathematical function called a hash that [ And] you also usually add some salt: Even if two users choose the same password, their salts will be different, so they’ll end up with different hashes, which makes things much harder for an attacker.
It seems we got it all wrong, in more than one way. The breach data A huge dump of the offending customer database was recently published online, weighing in at 4GB compressed, or just a shade under 10GB uncompressed, listing not just 38,, breached records, but ,, of them.
As breaches go, you may very well see this one in the book of Guinness World Records next year, which would make it astonishing enough on its own. We used a sample of 1,, items from the published dump to help you understand just how much more. We took every tenth record from the first MB of the comressed dump until we reached 1,, records.
We think this provided a representative sample without requiring us to fetch all million records. The dump looks like this: By inspection, the fields are as follows: Fewer than one in 10, of the entries have a username — those that do are almost exclusively limited to accounts at adobe. The user IDs, the email addresses and the usernames were unnecessary for our purpose, so we ignored them, simplifying the data as shown below.
We kept the password hints, because they were very handy indeed, and converted the password data from base64 encoding to straight hexadecimal, making the length of each entry more obvious, like this: The password data certainly looks pseudorandom, as though it has been scrambled in some way, and since Adobe officially said it was encrypted, not hashed, we shall now take that claim at face value.
Stream ciphers are commonly used in network protocols so you can encrypt one byte at a time, without having to keep padding your input length to a multiple of a fixed number of bytes. Anyone who computes, guesses or acquires the decryption key immediately gets access to all the passwords in the database. The reason that ECB is never used other than as the basis for the more complex encryption modes is that the same input block encrypted with the same key always gives the same output.
We took an RGB image of the Sophos logo, where each pixel most of which are some sort of white or some sort of blue takes three bytes, divided it into 8-byte blocks, and encrypted each one using DES in ECB mode. Treating the resulting output file as another RGB image delivers almost no disguise: Cipher modes that disguise plaintext patterns require more than just a key to get them started — they need a unique initialisation vector, or nonce number used once , for each encrypted item.
The nonce is combined with the key and the plaintext in some way, so that that the same input leads to a different output every time. Perhaps the encryption used the User ID of each entry, which we can assume is unique, as a counter-type nonce? Because there are — close to 20 million million million — possible bit values for each cipertext block, we should expect no repeated blocks anywhere in the 1,, records of our sample set.
When Gawker Media got hacked three years ago, for example, the top passwords that were extracted from the stolen hashes came out like this: This previous data combined with the password hints leaked by Adobe makes building a crib sheet pretty easy: Note that the 8-character passwords and password are actually encrypted into 16 bytes, denoting that the plaintext was at least 9 bytes long.
A highly likely explanation for this is that the input text consisted of: In other words, we are on safe ground if we infer that e2aba09ab is the ciphertext that signals an input block of eight zero bytes. The scale of the blunder With very little effort, we have already recovered an awful lot of information about the breached passwords, including: Follow NakedSecurity on Twitter for the latest computer security news. Free tools.
How to Break or Crack Password from PDF File
Free PDF password remover, cracker, reset, and recovery tools for Windows Most PDF password cracker tools fall into one or more of three major categories: tools . Screenshot of the Document Open Password prompt in Adobe Reader. The structures contributed increased less than 5, The altitudes was linked pure bracings by Protecting down all injuries along organic earthquakes or. This article provides three ways to help crack PDF password without losing Chrome comes packed with a native PDF reader and does not.
Method 2: But, this method will only work if you already know the password. If you do not know the password, skip to the next method in this article. Chrome comes packed with a native PDF reader and does not require any additional plugin.
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The leak includes database entries, supposedly split between Adobe,. Edu” and many many more companies around the world! The occasional email addresses from countries as far apart as Argentina, Australia, New Zealand and the UK remind us of the global nature of the data he claims to have stolen.
VIDEO: How to Break or Crack PDF Password Protected File
If somebody creates a PDF and then forgets the password, they need some way to a login page on page 1, where the viewer enters their username and password. From that point on, Adobe’s reader may prevent access if the file has been. An allegedly Egyptian hacker going by the name ViruS_HimA has allegedly hacked into Adobe. Wherever the data actually comes from. The thing is, the problem is not only with the Adobe Reader. If u have a password on this kind of file. How do I crack the password of a protected PDF file?.