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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
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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
I will be participating with Cisco in a webinar on Telephony Denial of Service (TDoS) October the 28th at 10:00 AM CST. You can check it out and register at the following link: https://communities.cisco.com/message/166030#166030 Continue reading
Posted Oct 14, 2014 at Mark Collier's VoIP/UC Security Blog
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The Federal Trade Commission (FTC) is continuing their fight against those annoying robocalls, by sponsoring their Zapping Rachel challenge at the most recent DEFCON 22 conference. The focus of the challenge was phone honey pots (phonypots), which are used to... Continue reading
Posted Sep 15, 2014 at Mark Collier's VoIP/UC Security Blog
See the video in the link below. This is another case of robocalls, specifically automated debt collection calls, gaining significant national attention: http://abcnews.go.com/Nightline/video/robocalls-cell-phone-money-24768246 We all know that these calls are a big issue for consumers on their land lines. The... Continue reading
Posted Jul 31, 2014 at Mark Collier's VoIP/UC Security Blog
The FBI just released another private industry notification to warn enterprises about contined Telephony Denial of Service (TDoS) attacks. The FBI warns that the attacks tend to target hospitals and Public Safety Access Points (PSAPs), the administrative part of a... Continue reading
Posted Jul 12, 2014 at Mark Collier's VoIP/UC Security Blog
Back in 2011, a firm was hit with toll fraud and racked up a $35,000 bill. The firm refused to pay and fought the issue in court. The court found in favor of the firm and ruled that the service... Continue reading
Posted Jul 9, 2014 at Mark Collier's VoIP/UC Security Blog
Jon Arnold made several blog posts on toolbox.com on VoIP security. Here is a link to the latest one, discussing toll fraud: http://it.toolbox.com/blogs/voip-news/two-more-things-to-know-about-toll-fraud-61803 There are several other articles - check them out. Continue reading
Posted Jun 27, 2014 at Mark Collier's VoIP/UC Security Blog
For those not familiar with STIR, it is an effort (working group) attempting to solve the issue of spoofed calling number (caller ID). It has become so easy to generate calls with random anonymous numbers or specific/targeted spoofed numbers, that... Continue reading
Posted Jun 12, 2014 at Mark Collier's VoIP/UC Security Blog
Here is an interesting article about the relevance and techniques for wardialing in 2014. http://www.freehowtohackwifi.com/general-wifi-hacking/war-dialing/ Wardialing and modems are still a reality despite the wide adoption of VoIP. Also, the available of VoIP at the war dialing tool side, has... Continue reading
Posted Jun 5, 2014 at Mark Collier's VoIP/UC Security Blog
Here is a link to a good video on VoIP and SIP security. http://www.securitytube.net/video/10151 Patrick McNeil covers how to hack SIP servers, at service providers and enterprises, to make money. The presentation is useful because it covers why someone might... Continue reading
Posted Jun 5, 2014 at Mark Collier's VoIP/UC Security Blog