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voipsecurityblog
I am a 50 year old, married, guy with four daughters, computer security professional.
Interests: my family, poker, exercise, hacking UC/VoIP
Recent Activity
11/03/2016 - The day the 911 network stood still http://www.networkworld.com/article/3137526/security/the-day-the-911-network-stood-still.html 10/24/2016 - DHS working to protect emergency call centers against denial-of-service attacks https://gcn.com/articles/2016/10/24/tdos-dhs.aspx?admgarea=TC_SecCybersSec 09/22/2016 - Schumer calling for increased security of 911 communications nationwide http://www.watertowndailytimes.com/news03/schumer-calling-for-increased-security-of-911-communications-nationwide-20160922 09/13/2016 - Answering the call... Continue reading
Posted Nov 12, 2016 at Mark Collier's VoIP/UC Security Blog
There have been multiple articles describing a “botnet” of 1000’s of compromised smartphones, which all make calls to a 911 Public Safety Answering Point (PSAP) or some other target. A smartphone-based attack is the primary way to generate a TDoS... Continue reading
Posted Nov 11, 2016 at Mark Collier's VoIP/UC Security Blog
I don't know how widely "The Cyber Shield" is distributed. I believe we get it because some of our folks have security clearances (so if true, lots of people get it). Anyway, there is some info about our recent article... Continue reading
Posted Nov 7, 2016 at Mark Collier's VoIP/UC Security Blog
See the article below about a young hacker who "accidentally" or so he says, generated a Telephony Denial of Service (TDoS) attack against 911 facilities in the Phoenix area. The hacker had a twitter account with some 12,000 followers and... Continue reading
Posted Nov 2, 2016 at Mark Collier's VoIP/UC Security Blog
See the follow up article below in GCN, describing how the Department of Homeland Security (DHS) Science and Technology (S&T) Cyber Security Division (CSD) is working with SecureLogix help address the issue of Telephony Denial of Service (TDoS) attacks in... Continue reading
Posted Oct 27, 2016 at Mark Collier's VoIP/UC Security Blog
Check out the following articles on Telephony Denial of Service (TDoS) and how it could affect 911 systems. The threat described involves how a botnet of affected smart phones, could be used to flood a 911 center in the same... Continue reading
Posted Oct 10, 2016 at Mark Collier's VoIP/UC Security Blog
There have been several articles about a bust of at least 70 people in India, who are behind some of the IRS scam phone scam. We have been working the the IRS/TIGTA, the FTC, and DHS CSD on this issue... Continue reading
Posted Oct 7, 2016 at Mark Collier's VoIP/UC Security Blog
Here are a couple of links to the Department of Homeland Security (DHS) Cyber Security Division (CSD) showcase earlier this year. They did a great job of recording the videos of all the presenters. We were fortunate to be a... Continue reading
Posted Oct 6, 2016 at Mark Collier's VoIP/UC Security Blog
It is time to start blogging again. I have been really busy. Aside from normal work, I am ramping up my work with the Cyber Security Division (CSD) of DHS S&T, to focus on addressing calling number spoofing/lack of authentication,... Continue reading
Posted Jul 24, 2016 at Mark Collier's VoIP/UC Security Blog
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Here is a video from last years DefCon on how to use a burner cell phone to generate a bunch of calls for a Telephony Denial of Service (TDoS) attack. This allows an attacker to create a virtually untraceable and... Continue reading
Posted Aug 12, 2015 at Mark Collier's VoIP/UC Security Blog
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The Department of Homeland Security, Science and Technology Directorate, Cyber Security Division hosted their annual show case late last year. This event gives all active researchers the opportunity to briefly cover their area of research. DHS just posted the videos.... Continue reading
Posted Aug 10, 2015 at Mark Collier's VoIP/UC Security Blog
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A new Internet based tool is available now to simplify making calls with spoofed calling number. The main difference with this tool, is that it only accepts Bitcoin, so it is more anonymous. It certainly lowers the bar provides another... Continue reading
Posted Aug 2, 2015 at Mark Collier's VoIP/UC Security Blog
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The National Law Review included a brief article on Telephony Denial of Service. Mostly talking about the impacts to health care and emergency services. Check out the article at the link below: Link to National Law Review Article on TDoS Continue reading
Posted Jul 24, 2015 at Mark Collier's VoIP/UC Security Blog
This is my first post. Soheila Continue reading
Posted Jul 14, 2015 at SoheilaCollierBlog
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For those following my blog, you know that Telephony Denial of Service (TDoS) is a flood of unwanted inbound calls, typically to an enterprise contact center. The calls can arrive at any enterprise or any part of an enterprise, but... Continue reading
Posted Jul 10, 2015 at Mark Collier's VoIP/UC Security Blog
This is one of the best articles I have read in a while. It covers how Pakistan captured multiple individuals on the FBI's most wanted list - responsible for millions of dollars of toll fraud and International Revenue Sharing Fraud... Continue reading
Posted Jun 23, 2015 at Mark Collier's VoIP/UC Security Blog
Here is a link to a YouTube video describing a new VoIP Security scanner/penetration tool named "Bluebox-ng". I have not played with it, but it looks pretty cool. It has been a while since we have seen any new VoIP... Continue reading
Posted Jun 22, 2015 at Mark Collier's VoIP/UC Security Blog
Here is a link to a recent webinar I did back in March on Telephony Denial of Service (TDoS). We did this with one of our partners, iSight. The focus was on dealing with this issue in contact centers. http://www.slideshare.net/isightsoftware/keeping-denial-of-service-and-financial-fraud-out-of-your-contact-center Continue reading
Posted Jun 22, 2015 at Mark Collier's VoIP/UC Security Blog
I haven't been posting much to my blog. It is so easy to post info to LinkedIn, Twitter, and Google+. I need to get back into it. I have several posts that I will be putting up soon. I am... Continue reading
Posted Jun 22, 2015 at Mark Collier's VoIP/UC Security Blog
I attached a briefing from the Florida Department of Law Enforcement describing a threat from Anonymous to target federal and local law enforcement and Child Protective Services (CPS) with Telephony Denial of Service (TDoS) attacks. The attack is supposed to... Continue reading
Posted Mar 4, 2015 at Mark Collier's VoIP/UC Security Blog
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The article below describes a new Telephony Denial of Service (TDoS) generation tool: http://securityaffairs.co/wordpress/33867/cyber-crime/tnt-gang-released-tdos-tool.html This tool appears to be an evolution of the one described in the following article: http://www.webroot.com/blog/2014/01/16/new-tdos-market-segment-entrant-introduces-96-sim-cards-compatible-custom-gsm-module-positions-market-disruptor/ As stated in the article, TDoS is a flood of... Continue reading
Posted Feb 24, 2015 at Mark Collier's VoIP/UC Security Blog
There have been several advertisements for Telephony Denial of Service (TDoS) attack services popping up. I provided a link to one below. These seem to come and go, as they are removed from sites, but this one has been up... Continue reading
Posted Jan 31, 2015 at Mark Collier's VoIP/UC Security Blog
Here is a link to the webinar I did this week, along with Cisco, on Telephony Denial of Service. You do have to register, but that is a small price to pay :) http://tools.cisco.com/gems/cust/customerSite.do?METHOD=E&LANGUAGE_ID=E&SEMINAR_CODE=S21445&PRIORITY_CODE=000566573 Continue reading
Posted Oct 31, 2014 at Mark Collier's VoIP/UC Security Blog
Here is a link to a good article in a national publication, the New York Times, on the growing issue of toll fraud. Toll fraud has been around for many years, but continues to get worse for a number of... Continue reading
Posted Oct 22, 2014 at Mark Collier's VoIP/UC Security Blog
Here is a link on Youtube of a recent video we did on Telephony Denial of Service (TDoS). It covers the concept and then the various types of attacks that we are seeing, including manual TDoS, social networking TDoS, and... Continue reading
Posted Oct 14, 2014 at Mark Collier's VoIP/UC Security Blog