Metaphorically Exploited | TechSNAP 258

chris

6 years ago

The theoretical Android flaw becomes reality, a simple phishing scam hits some major companies & why your PIN has already been leaked.

Plus great questions, our answers, a rocking round up & much, much more!

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Show Notes:

W2 Phishing scams hit a number of companies

“Payday lending firm Moneytree is the latest company to alert current and former employees that their tax data — including Social Security numbers, salary and address information — was accidentally handed over directly to scam artists”
“Seattle-based Moneytree sent an email to employees on March 4 stating that “one of our team members fell victim to a phishing scam and revealed payroll information to an external source.”
“Moneytree was apparently targeted by a scam in which the scammer impersonated me (the company co-founder) and asked for an emailed copy of certain information about the Company’s payroll including Team Member names, home addresses, social security numbers, birthdates and W2 information,” Moneytree co-founder Dennis Bassford wrote to employees.”
Why that would even be a reasonable request, I don’t know
“Unfortunately, this request was not recognized as a scam, and the information about current and former Team Members who worked in the US at Moneytree in 2015 or were hired in early 2016 was disclosed. The good news is that our servers and security systems were not breached, and our millions of customer records were not affected. The bad news is that our Team Members’ information has been compromised.”
Moneytree joins a growing list of companies disclosing to employees that they were duped by W2 phishing scams, which this author first warned about in mid-February. Earlier this month, data storage giant Seagate acknowledged that a similar phishing scam had compromised the tax and personal data on thousands of current and past employees.
“On March 1, Seagate Technology learned that the 2015 W-2 tax form information for current and former U.S.-based employees was sent to an unauthorized third party in response to the phishing email scam. The information was sent by an employee who believed the phishing email was a legitimate internal company request.”
“W2 information is highly prized by fraudsters involved in tax refund fraud, a multi-billion dollar problem in which thieves claim a large refund in the victim’s name, and ask for the funds to be electronically deposited into an account the crooks control.”
“For better or worse, most companies that have notified employees about a W2 phish this year are offering employees the predictable free credit monitoring, which is of course useless to prevent tax fraud and many other types of identity theft. But in a refreshing departure from that tired playbook, Moneytree says it will be giving employees an extra $50 in their next paycheck to cover the initial cost of placing a credit freeze (for more information on the different between credit monitoring and a freeze and why a freeze might be a better idea, check out Credit Monitoring vs. Freeze and How I Learned to Stop Worrying and Embrace the Security Freeze).”
““When something like this happens, the right thing to do is to disclose what you know as soon as possible, take care of the people affected, and learn from what went wrong. To make good on that last point, we will be ramping up our information security efforts company-wide, because we never want to have to write an email like this to you again”.”

New exploit developed for Android Stagefright

“Security researchers have successfully exploited the Android-based Stagefright bug and remotely hacked a phone, which may leave millions devices vulnerable to attack.”
“Israeli software research company NorthBit claimed it had “properly” exploited the Android bug that was originally described as the “worst ever discovered”.”
“The exploitation, called Metaphor, is detailed in a research paper (PDF) from NorthBit and also a video showing the exploit being run on a Nexus 5. NorthBit said it had also successfully tested the exploit on a LG G3, HTC One and Samsung Galaxy S5.”
“The Stagefright vulnerability was first highlighted by security firm Zimperium in July 2015. The hack was said to be able to execute remote code on Android devices and could possibly affect up to 95 percent of Android devices.”
“A second critical vulnerability exploited issues in .mp3 and .mp4 files, which when opened were claimed to be able to remotely execute malicious code, was dubbed Stagefright 2.0 in October.”
The flaws were originally thought to not be easily exploitable, but this new research provides a simple remote exploit case
“The researchers from NorthBit say they have been able to create an exploit that can be used against Stagefright on Android 2.2, 4.0, 5.0 and 5.1. Other versions are not affected.”
Android 5.0 and above are protected by ASLR, however “Dabah claims the exploit “depicts a way to bypass” address space layout randomisation (ASLR)”
“”We managed to exploit it to make it work in the wild,” Dabah said. The research paper reads: “Breaking ASLR requires some information about the device, as different devices use slightly different configurations which may change some offsets or predictable addresses locations.”
“”I would be surprised if multiple professional hacking groups do not have working Stagefright exploits by now. Many devices out there are still vulnerable, so Zimperium has not published the second exploit in order to protect the ecosystem”.”
Researcher PDF
I am glad my phone runs Android 6.0.1 with the March 2016 Security Updates applied

PIN analysis

“There are 10,000 possible combinations that the digits 0-9 can be arranged to form a 4-digit pin code. Out of these ten thousand codes, which is the least commonly used?”
“People are notoriously bad at generating random passwords. I hope this article will scare you into being a little more careful in how you select your next PIN number. Are you curious about what the least commonly used PIN number might be?”
“I was able to find almost 3.4 million four digit passwords. Every single one of the of the 10,000 combinations of digits from 0000 through to 9999 were represented in the dataset”
“A staggering 26.83% of all passwords could be guessed by attempting the top 20 combinations”
“The first “puzzling” password I encountered was 2580 in position #22. What is the significance of these digits? Why should so many people select this code to make it appear so high up the list?”
This turns out to be straight down the middle of a telephone style number pad. Not the same as on on a computer, but most ABMs use the telephone style
“Another fascinating piece of trivia is that people seem to prefer even numbers over odd, and codes like 2468 occur higher than a odd number equivalent, such as 1357”
“Statistically, one third of all codes can be guessed by trying just 61 distinct combinations! The 50% cumulative chance threshold is passed at just 426 codes (far less than the 5,000 that a random uniformly distribution would predict)”
The most unpopular pin is: 8068
“Warning Now that we’ve learned that, historically, 8068 is (was?) the least commonly used password 4-digit PIN, please don’t go out and change yours to this! Hackers can read too! They will also be promoting 8068 up their attempt trees in order to catch people who read this (or similar) articles.”
“Many of the high frequency PIN numbers can be interpreted as years, e.g. 1967 1956 1937 … It appears that many people use a year of birth (or possibly an anniversary) as their PIN. This will certainly help them remember their code, but it greatly increases its predictability”
Pins that start with 19 dominate the top 10%, and all appear within the top 20%
The heatmap also shows that people tend to use Birthdays a lot as well (MMDD)