Tor and SIEM

I've been doing a piece of work with a client recently using a SIEM tool to monitor web and application logs for suspicious/fraudulent activity. One interesting strategy they are using is to look for Tor exit nodes in the web logs and flag activity in these sessions as suspicious. I think this is a sensible approach, these days there is a lot more to security decisions than the binary allow/deny of a traditional firewall. The fact that it is coming from a Tor exit node does not automatically make it malicious (there are plenty of legitimate uses for Tor) however it is one part of the toolkit that someone with nefarious intent may use to hide their true identity when attempting to breach your systems. This uncertainty means that the traffic from these addresses isn't an appropriate candidate for blacklisting but rather warrants further investigation. There is a wealth of data like this available, much of it freely available, that is useful to correlate with your own data in order to build a picture of the traffic which is reaching your network. For Example:

Tor Exit Nodes Matched against the source IP address
Google Safe Browsing API Matched against the referer in your web logs (anti-phishing)
SANS Top Sources Matched against the source IP address
Team Cymru Lots of interesting data
Project Honey Pot/ More interesting data
...

I suppose the drawback to this approach is that it is still a little reactive and requires human intervention to investigate which may or may not be a problem depending on volumes. One possible enhancement is to use this data as part of the decision making process (possibly with a low weighting) in a preventative mechanism that utilises a scoring mechanism to decide if traffic is malicious such as a WAF or IPS, though I'm sure this is already implemented to some extent.



Leaky LinkedIn

So since I heard about the leak of the LinkedIn passwords, I've been waiting to see what the first analysis of the dumped hashes would reveal. Theoretically LinkedIn is a bit of a different beast to other sites that have been breached, as the target users are working professionals, the type of people who have more than likely been educated again and again on passwords by their employers.

And here are some results from Qualys, where they pretty quickly obtained 2 million passwords with not a great deal of effort, including gems such as 'm0c.nideknil.' Overall something like 98% of the hashes have now been cracked.

As for LinkedIn, using unsalted hashes to store passwords? This is security 101 stuff and quite frankly, embarrassing for a company of their size and age. Of course the unsalted part may not be the worst, the big question still remains about how the passwords got stolen in the first place.

As Richard previously posted - change your password! And if you are interested in seeing if your password was included* in the released ones: http://www.leakedin.org/

(*not specifically YOUR password, but a hash of the same password as the one you were using.)

LinkedIn Password Breach

Atari fail.

This arrived in my inbox yesterday:


Atari recently learned of a potential security violation in connection with the unauthorized access to Cryptic Studios’ user databases that occurred in December 2010.  At that time, Atari owned Cryptic and the intrusion may have affected users on Atari’s databases as well and, therefore, we are taking proactive measures to correct the issue. This includes notifying certain users who are registered on Atari.com and TDU2.com (Test Drive Unlimited 2).
As a precaution, on Atari.com and TDU2.com, we have reset all accounts for users which we believe were affected. This will require you to reset your password upon attempting to log into each site separately to regain access to your account.  To do so, please refer to our website at http://atari.com/pages/cryptic-studios-security-notice-atari-websites for detailed instructions and more information about this issue.
If the existing user name and password was used to access other online accounts, we highly recommend that you update those passwords as well.
We take the security of our user accounts very seriously and are investigating this issue further with Cryptic Studios.   Please note that this was not an intrusion on our existing database, but one that occurred prior to our divestment of Cryptic Studios in July of 2011.  Cryptic no longer manages Atari’s databases.  Our deepest apologies for the inconvenience.
Atari
December 2010? And it took until April 2012 to tell impacted customers? *sigh*.
Look at what else occurred between the breach and the notification:

  • "Arab Spring" uprisings oust leaders in Tunisia, Egypt, Yemen and Libya,
  • Southern Sudan became an independent republic.
  • The earthquake/tsunami and reactor meltdown in Fukushima, Japan
  • British Royal Wedding
  • Osama Bin Laden killed by US special forces
  • End of the US Space shuttle program
  • European economic crisis
  • Severe flooding in Thailand and Fiji
  • The entire 'occupy' movement
  • Encyclopaedia Britannica stops hard-copy publication
  • Steve Jobs, Elizabeth Taylor, Peter Falk, Whitney Houston, the King of Tonga and Randy "Macho Man" Savage all died.
Not good enough Atari. On the bright side, despite once owning the home console market, you're less of a household name than Sony so probably won't get as much press....

FUD

This has to be one of the more blatant cases of FUD I have seen in a while

2012 - planning ahead.

2012 is well and truly here. Possibly the end of the world if you believe the Mayan Calendar conspiracy types, but perhaps more likely the end of some businesses (and their employees) if the lessons of 2011 haven't been learned.

Last year felt like a tipping point in the awareness of information security threats in the boardroom. With so many high-profile hacks that saturated the mainstream media, even the most cynical of executives probably caught themselves wondering whether their organization was doing enough to protect their data.

So what sort of questions should business executives be asking themselves? (in no particular order...)


Do you truly understand your critical data and assets?
What is it? Where is it? Who has access to it?
Determine what is critical for your business: is it your e-commerce server? Your customer data? Your R&D data? Once you've identified what it is, you need to understand how valuable it is - try this exercise: imagine you were selling your company tomorrow. How much would it be worth? Now imagine your most critical data asset was not included in the sale - by how much does that decrease the companies' value?
Once you understand what you're trying to protect (any hopefully how valuable it is), you need to locate it - both physically and logically - before you can look at protecting it.

Who is responsible (and accountable!) for protecting that critical data?
If nobody is responsible or accountable, then odds are nobody is protecting your critical data and any data loss or breach will be 'somebody else's problem'. Hopefully by now you have an understanding of the value of your critical data and can see the need to protect it adequately. However identifying and appointing someone is only half the job - do they have the skills and resources required to do the job? Are the objectives of your security program clearly defined? Equally importantly, do they have the authority to make any required changes; to data access, storage location or use? As the expression goes: "if you're responsible for security but don't have the authority to enforce security; then your true role is to take the blame when things go wrong"

How do you measure the effectiveness of that security?
Is your security in the right place? Are the right risks being addressed? Is that security reviewed regularly to ensure it is still adequate? How do you measure that? Have risk appetites for information security-related risks been set?
Many books have been written on measuring security effectiveness, and I doubt there is a single 'right way'. My advice is to measure the things you can control - not the things you cannot. For example, don't measure the number of intrusion attempts from the internet; measure your response metrics from detection to closure.
A clearly defined risk appetite is also critical - not just for information security, but for all of your operational or financial risks. At it's core, Information Security is a practical application of risk management, so having a clear understanding of hown much risk you're willing to tolerate; and under what circumstances; is critical.

Can you detect breaches? Do you know what to do if one occurs?
How mature is your 'security intelligence'? Some organizations have been infiltrated for months before a data breach was detected. Do you have a CERT/CSIRT plan for responding to breaches?
Like Disaster Recovery/BCP or even a fire drill, knowing what to do when something bad happens can stop a bad situation from getting worse. Having a plan alone isn't enough, it must be regularly tested to ensure all participants understand their role and can perform under the pressure of a real security incident where time may be of the essence.

Does your security program meet compliance requirements?
With ever increasing legal requirements does your security program still match up? Have you reviewed your current processes against SOX, HIPPA, PCI-DSS, or any other applicable legislation recently? Are there proposed changes on the horizon that may effect the way you currently protect your data? How often do you review your security, not only against the changing threat landscape, but against changing regulations, technologies and best practice?


Is the company culture 'security aware'?
Information security staff can only do so much. Like a neighbourhood watch, diligent employees are the best defence against information security incidents. Do your employees know not to open random email attachments or how to spot a social engineer? Do they know who to contact if they suspect an incident has occurred? Do they undertake regular security awareness training?


Can your current security practices evolve with the business?
The IT industry is in the middle of one of it's biggest shake-ups in recent history. With the increasing consumerization of IT driving the need for flexibility such as BYOD programs, cloud computing pushing in from all sides and the ever growing need for company data to be highly mobile and accessible, securing your sensitive corporate and customer data has probably never been more challenging. As all of these external pressures aren't going to go away, is your current Information Security program or strategy flexible enough to cope with the changing environment?

There are undoubtedly other important questions you could ask yourself, but if you can answer these few with confidence then you are most likely ahead of some of your peers and on your way to being able to sleep soundly at night.

“By failing to prepare, you are preparing to fail.” - Benjamin Franklin

Killer Virus

While speaking with a friend over Christmas about the pros and cons of quarantining infected PCs from the internet (not a new idea by any means as it was brought up by Microsoft several years ago) and the analogy with diseased humans, one point was that computer viruses haven't killed anyone (yet?).

But might a virus let a killer go free?

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