The security researchers at High-Tech Bridge have been
taking a close look
at Pastebin.com, a site which is used legitimately by programmers to
share code – but also popular with hackers who wish to anonymously dump
stolen data to provide evidence of a successful breach.
Having discarded from its study obvious fakes, duplicates and minor
information leaks involving more than 100 users, High-Tech Bridge
discovered evidence that details of 311,095 compromised accounts
(usernames and passwords) had been published on Pastebin in the last 12
months.
And it didn’t stop there, according to the Swiss firm, which noted
that on average each leak recorded on Pastebin contained 1000 user
credentials:
In many cases other personal details, such as credit card
numbers, addresses and phone numbers of the victims were also published
by the hackers.
Worst of all, according to researchers, the details published on
Pastebin often reflected a mere “0.01% – 1% of the total information
compromised by the hackers.”
High-Tech Bridge CEO Ilia Ilia Kolochenko believes the problem seen on Pastebin to be just the tip of the iceberg:
“300,000 compromised user accounts during the last twelve
months is a huge number if we take into consideration that this amount
of information is being stored just on one single legitimate website.
Moreover, these 300,000 are just a small percentage of the stolen
information posted publically by hackers. It’s impossible to make a
precise estimate of how many user accounts were really compromised, but I
think we can speak about several hundreds of millions at least. People
finally need to understand that the Internet is very hostile place,
while online service providers need to finally start taking network
security seriously.”
Effectively, the hackers are using Pastebin as a means to advertise
their hacks, and their capabilities, whilst still impacting thousands of
computer users and firms around the world.
Some companies have become so worried about their private data
appearing on Pastebin that they use search engine bots to automatically
scour the site at regular intervals, hunting for confidential
information which may relate to their business.
So what kind of information is being leaked on Pastebin?
As the following chart shows, the most common source for the leaked information published on Pastebin are email systems:
Main source of leakages posted on Pastebin
Source of Leakage |
Percentage from Total |
Email Systems |
40.9% |
Miscellaneous / Mixed / Unknown |
40.6% |
Social Networks |
13.1% |
Online Games |
2.8% |
Online Payment Systems |
1.5% |
Online Shops |
1.1% |
Two webmail services rule the roost when it comes to the most likely
leaked credentials: Gmail and Yahoo. Perhaps that’s not surprising
considering the popularity of the email services.
Most frequent compromised emails posted on Pastebin
Most Popular Domain |
Percentage from Total |
gmail.com |
25.1% |
yahoo.com |
22.0% |
hotmail.com |
7.6% |
mail.ru |
5.2% |
Others |
38.2% |
By the way, in case you are wondering, social networking login
credentials are often frequently posted on Pastebin by hackers. And
there are no surprises at all which social network tops the chart.
Facebook accounts for a massive 92% of all compromised social network
accounts listed on Pastebin, with Twitter taking up most of the
remaining space with 7.8%.
For its part, Pastebin says that it receives a large volume of emails from users
reporting abuse on its site, and does attempt to take “appropriate action” within 24 hours.
Of course, by then it’s often too late.
You can learn more about High-Tech Bridge’s examination of compromised accounts published on Pastebin, on the
security firm’s website.